From ae5f073996625779d191002c94d6e2e608afe35a Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Sun, 18 Jan 2015 19:20:29 +0000
Subject: [PATCH] Major refactoring work to minimize tables in BridgeCompute class.

---
 app/app.iml                                                                 |   11 
 app/src/main/res/layout/main.xml                                            |    8 
 app/src/main/java/net/jacekk/bridge/BridgeResult.java                       |    6 
 app/src/main/res/values/strings.xml                                         |   14 
 app/src/main/java/net/jacekk/bridge/android/MainActivity.java               |   85 ++---
 app/src/main/java/net/jacekk/bridge/BridgeInput.java                        |   50 +++
 app/src/main/res/values-pl/strings.xml                                      |   12 
 app/src/main/java/net/jacekk/bridge/android/BridgeInputExceptionMapper.java |   24 +
 app/src/androidTest/java/net/jacekk/bridge/BrydzLicz.java                   |  206 +++++++--------
 .idea/misc.xml                                                              |    3 
 app/src/main/java/net/jacekk/bridge/BridgeCompute.java                      |  214 ++++++++-------
 app/src/main/java/net/jacekk/bridge/BridgeInputException.java               |   20 +
 app/src/androidTest/java/net/jacekk/bridge/BridgeComputeTest.java           |  110 ++++++++
 13 files changed, 478 insertions(+), 285 deletions(-)

diff --git a/.idea/misc.xml b/.idea/misc.xml
index 1f6b7aa..7855c83 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="EntryPointsManager">
+    <entry_points version="2.0" />
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" assert-keyword="true" jdk-15="true" project-jdk-name="1.7" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/classes" />
   </component>
diff --git a/app/app.iml b/app/app.iml
index c6c55c4..4753f0d 100644
--- a/app/app.iml
+++ b/app/app.iml
@@ -86,6 +86,17 @@
     <orderEntry type="library" exported="" name="appcompat-v7-21.0.3" level="project" />
     <orderEntry type="library" exported="" name="support-annotations-21.0.3" level="project" />
     <orderEntry type="library" exported="" name="support-v4-21.0.3" level="project" />
+    <orderEntry type="module-library" scope="TEST">
+      <library name="JUnit4">
+        <CLASSES>
+          <root url="jar://$APPLICATION_HOME_DIR$/lib/junit-4.11.jar!/" />
+          <root url="jar://$APPLICATION_HOME_DIR$/lib/hamcrest-core-1.3.jar!/" />
+          <root url="jar://$APPLICATION_HOME_DIR$/lib/hamcrest-library-1.3.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
   </component>
 </module>
 
diff --git a/app/src/androidTest/java/net/jacekk/bridge/BridgeComputeTest.java b/app/src/androidTest/java/net/jacekk/bridge/BridgeComputeTest.java
index f283084..d5f952d 100644
--- a/app/src/androidTest/java/net/jacekk/bridge/BridgeComputeTest.java
+++ b/app/src/androidTest/java/net/jacekk/bridge/BridgeComputeTest.java
@@ -1,7 +1,109 @@
 package net.jacekk.bridge;
 
-/**
- * Created by jacek on 18.01.15.
- */
-public class BridgeComputeTest {
+import junit.framework.TestCase;
+
+public class BridgeComputeTest extends TestCase {
+    BridgeCompute compute = new BridgeCompute();
+    BrydzLicz computeExpected = new BrydzLicz();
+
+    public void testGetIMPs() {
+        assertEquals(0, compute.getIMPs(0));
+        assertEquals(0, compute.getIMPs(10));
+        assertEquals(1, compute.getIMPs(20));
+        assertEquals(1, compute.getIMPs(30));
+        assertEquals(1, compute.getIMPs(40));
+        assertEquals(2, compute.getIMPs(50));
+
+        assertEquals(23, compute.getIMPs(3999));
+        assertEquals(24, compute.getIMPs(4000));
+        assertEquals(24, compute.getIMPs(4001));
+    }
+
+    public void testGetPercent() {
+        assertEquals(50, compute.getPercent(20, 0, 0));
+        assertEquals(44, compute.getPercent(21, 0, 0));
+    }
+
+    public void testGetResultForBasic() throws BridgeInputException {
+        BridgeInput input = new BridgeInput();
+        input.bid = 0;
+        input.PC = 20;
+        input.weVulnerable = false;
+        input.theyVulnerable = false;
+        input.suit = BridgeInput.Suit.MINOR;
+        input.contract = BridgeInput.Contract.NORMAL;
+        BridgeResult result;
+
+        result = compute.getResultForInput(input);
+        assertEquals(BridgeResult.Side.They, result.winners);
+        assertEquals(0, result.IMPs);
+        assertEquals(50, result.percent);
+
+        input.PC = 21;
+        result = compute.getResultForInput(input);
+        assertEquals(BridgeResult.Side.They, result.winners);
+        assertEquals(2, result.IMPs);
+        assertEquals(56, result.percent);
+
+        input.PC = 24;
+        result = compute.getResultForInput(input);
+        assertEquals(BridgeResult.Side.They, result.winners);
+        assertEquals(5, result.IMPs);
+        assertEquals(56, result.percent);
+
+        input.PC = 25;
+        result = compute.getResultForInput(input);
+        assertEquals(BridgeResult.Side.They, result.winners);
+        assertEquals(7, result.IMPs);
+        assertEquals(74, result.percent);
+    }
+
+    public void testGetResultForFull() throws BridgeInputException {
+        int contract;
+        int suit;
+        int game;
+        int vulnerability;
+        int PC;
+        int tricks;
+        BridgeInput input = new BridgeInput();
+        BridgeResult result;
+        BrydzLicz.BrydzWynik expectedResult;
+
+        for (contract = 0; contract <= 7; contract++) {
+            input.bid = contract;
+            for (suit = 0; suit <= 2; suit++) {
+                input.suit = BridgeInput.Suit.values()[suit];
+                for (game = 0; game <= 2; game++) {
+                    input.contract = BridgeInput.Contract.values()[game];
+                    for (vulnerability = 0; vulnerability <= 3; vulnerability++) {
+                        input.weVulnerable = vulnerability / 2 >= 1;
+                        input.theyVulnerable = vulnerability % 2 >= 1;
+                        for (PC = 0; PC <= 40; PC++) {
+                            input.PC = PC;
+                            for (tricks = 0; tricks <= 13; tricks++) {
+
+                                input.tricks = tricks;
+                                try {
+                                    result = compute.getResultForInput(input);
+                                } catch (Exception e) {
+                                    if (contract > 0) {
+                                        throw e;
+                                    }
+                                    continue;
+                                }
+
+                                expectedResult = computeExpected.policz(contract, suit, game, vulnerability, PC, tricks);
+
+                                assertEquals(input.toString(), expectedResult.dla, result.winners.ordinal());
+                                assertEquals(input.toString(), expectedResult.punkty_przed, result.pointsBefore);
+                                assertEquals(input.toString(), expectedResult.punkty, result.points);
+                                assertEquals(input.toString(), expectedResult.IMP, result.IMPs);
+                                assertEquals(input.toString(), expectedResult.procent, result.percent);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
 }
diff --git a/app/src/androidTest/java/net/jacekk/bridge/BrydzLicz.java b/app/src/androidTest/java/net/jacekk/bridge/BrydzLicz.java
index e1e1ae1..997075c 100644
--- a/app/src/androidTest/java/net/jacekk/bridge/BrydzLicz.java
+++ b/app/src/androidTest/java/net/jacekk/bridge/BrydzLicz.java
@@ -8,206 +8,204 @@
 package net.jacekk.bridge;
 
 public class BrydzLicz {
+    public class BrydzWynik {
+        public int dla;
+        public int punkty_przed;
+        public int punkty;
+        public int IMP;
+        public int procent;
+    }
+
     protected int lewy[][] = {
-        {0, 20, 40, 60, 80, 100, 120, 140}, // młodsze
-        {0, 30, 60, 90, 120, 150, 180, 210}, // starsze
-        {0, 40, 70, 100, 130, 160, 190, 220} // bez atu
+            {0, 20, 40, 60, 80, 100, 120, 140}, // młodsze
+            {0, 30, 60, 90, 120, 150, 180, 210}, // starsze
+            {0, 40, 70, 100, 130, 160, 190, 220} // bez atu
     };
-    
+
     protected int wpadki[][][] = {
-        {   // przed partią
-            {0, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650}, // normalnie
-            {0, 100, 300, 500, 700, 900, 1100, 1300, 1500, 1700, 1900, 2100, 2300, 2500}, // kontra
-            {0, 200, 600, 1000, 1400, 1800, 2200, 2600, 3000, 3400, 3800, 4200, 4600, 5000} // rekontra
-        },
-        {   // po partii
-            {0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300}, // normalnie
-            {0, 200, 500, 800, 1100, 1400, 1700, 2000, 2300, 2600, 2900, 3200, 3500, 3800}, // kontra
-            {0, 400, 1000, 1600, 2200, 2800, 3400, 4000, 4600, 5200, 5800, 6400, 7000, 7600} // rekontra
-        }
+            {   // przed partią
+                    {0, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650}, // normalnie
+                    {0, 100, 300, 500, 700, 900, 1100, 1300, 1500, 1700, 1900, 2100, 2300, 2500}, // kontra
+                    {0, 200, 600, 1000, 1400, 1800, 2200, 2600, 3000, 3400, 3800, 4200, 4600, 5000} // rekontra
+            },
+            {   // po partii
+                    {0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300}, // normalnie
+                    {0, 200, 500, 800, 1100, 1400, 1700, 2000, 2300, 2600, 2900, 3200, 3500, 3800}, // kontra
+                    {0, 400, 1000, 1600, 2200, 2800, 3400, 4000, 4600, 5200, 5800, 6400, 7000, 7600} // rekontra
+            }
     };
-    
+
     protected int PC[][][] = {
-        {   // MY: przed, WY: przed partią
-            {-1400, -1400, -1400, -1400, -1200, -1100, -1000, -900, -700, -600, -490, -460, -430, -400, -350, -300, -200, -110, -70, -50, 0, 50, 70, 110, 200, 300, 350, 400, 430, 460, 490, 600, 700, 900, 1000, 1100, 1200, 1400, 1400, 1400, 1400},
-            // MY: przed, WY: po partii
-            {-2100, -2100, -2100, -2100, -1800, -1650, -1500, -1350, -1050, -800, -690, -660, -630, -600, -520, -440, -290, -110, -70, -50, 0, 50, 70, 110, 200, 300, 350, 400, 430, 460, 490, 600, 700, 900, 1000, 1100, 1200, 1400, 1400, 1400, 1400}
-        },
-        {   // MY: po, WY: przed partią
-            {-1400, -1400, -1400, -1400, -1200, -1100, -1000, -900, -700, -600, -490, -460, -430, -400, -350, -300, -200, -110, -70, -50, 0, 50, 70, 110, 290, 440, 520, 600, 630, 660, 690, 800, 1050, 1350, 1500, 1650, 1800, 2100, 2100, 2100, 2100},
-            // MY: po, WY: po partii
-            {-2100, -2100, -2100, -2100, -1800, -1650, -1500, -1350, -1050, -800, -690, -660, -630, -600, -520, -440, -290, -110, -70, -50, 0, 50, 70, 110, 290, 440, 520, 600, 630, 660, 690, 800, 1050, 1350, 1500, 1650, 1800, 2100, 2100, 2100, 2100}
-        }
+            {   // MY: przed, WY: przed partią
+                    {-1400, -1400, -1400, -1400, -1200, -1100, -1000, -900, -700, -600, -490, -460, -430, -400, -350, -300, -200, -110, -70, -50, 0, 50, 70, 110, 200, 300, 350, 400, 430, 460, 490, 600, 700, 900, 1000, 1100, 1200, 1400, 1400, 1400, 1400},
+                    // MY: przed, WY: po partii
+                    {-2100, -2100, -2100, -2100, -1800, -1650, -1500, -1350, -1050, -800, -690, -660, -630, -600, -520, -440, -290, -110, -70, -50, 0, 50, 70, 110, 200, 300, 350, 400, 430, 460, 490, 600, 700, 900, 1000, 1100, 1200, 1400, 1400, 1400, 1400}
+            },
+            {   // MY: po, WY: przed partią
+                    {-1400, -1400, -1400, -1400, -1200, -1100, -1000, -900, -700, -600, -490, -460, -430, -400, -350, -300, -200, -110, -70, -50, 0, 50, 70, 110, 290, 440, 520, 600, 630, 660, 690, 800, 1050, 1350, 1500, 1650, 1800, 2100, 2100, 2100, 2100},
+                    // MY: po, WY: po partii
+                    {-2100, -2100, -2100, -2100, -1800, -1650, -1500, -1350, -1050, -800, -690, -660, -630, -600, -520, -440, -290, -110, -70, -50, 0, 50, 70, 110, 290, 440, 520, 600, 630, 660, 690, 800, 1050, 1350, 1500, 1650, 1800, 2100, 2100, 2100, 2100}
+            }
     };
-    
+
     protected int IMP[] = {0, 20, 50, 90, 130, 170, 220, 270, 320, 370, 430, 500, 600, 750, 900, 1100, 1300, 1500, 1750, 2000, 2250, 2500, 3000, 3500, 4000, 9999999};
-    
+
     protected int procenty_punkty[][] = {
-        {0, 50, 90, 120, 150, 180, 210, 300, 400, 430, 460, 490, 520, 800, 920, 940, 980, 990, 1020, 1400, 1440, 1520, 1530, 9999999}, // przed
-        {0, 50, 90, 120, 150, 180, 210, 500, 600, 360, 660, 690, 720, 810, 1370, 1390, 1430, 1440, 1470, 1700, 2000, 2220, 2230, 9999999} //po
+            {0, 50, 90, 120, 150, 180, 210, 300, 400, 430, 460, 490, 520, 800, 920, 940, 980, 990, 1020, 1400, 1440, 1520, 1530, 9999999}, // przed
+            {0, 50, 90, 120, 150, 180, 210, 500, 600, 630, 660, 690, 720, 810, 1370, 1390, 1430, 1440, 1470, 1700, 2000, 2220, 2230, 9999999} //po
     };
-    
+
     protected int procenty_PC[] = {0, 6, 10, 16, 21, 25, 31, 35, 9999999};
-    
+
     protected int procenty[][] = {
-        {-1, -1, -1, 50, 44, 26, 8, 0},
-        {83, 74, 65, 56, 47, 29, 11, 0},
-        {86, 77, 68, 59, 50, 32, 14, 0},
-        {89, 80, 71, 62, 53, 35, 17, 0},
-        {92, 83, 74, 65, 56, 38, 20, 2},
-        {95, 86, 77, 68, 59, 41, 23, 5},
-        {98, 89, 80, 71, 62, 44, 26, 8},
-        {100, 92, 83, 74, 65, 47, 29, 11},
-        {100, 95, 86, 77, 68, 50, 32, 14},
-        {100, 98, 89, 80, 71, 53, 35, 17},
-        {100, 100, 92, 83, 74, 56, 38, 20},
-        {100, 100, 95, 86, 77, 59, 41, 23},
-        {100, 100, 98, 89, 80, 62, 44, 26},
-        {100, 100, 100, 92, 83, 65, 47, 29},
-        {100, 100, 100, 95, 86, 68, 50, 32},
-        {100, 100, 100, 98, 89, 71, 53, 35},
-        {100, 100, 100, 100, 92, 74, 56, 38},
-        {100, 100, 100, 100, 95, 77, 59, 41},
-        {100, 100, 100, 100, 98, 80, 62, 44},
-        {100, 100, 100, 100, 100, 83, 65, 47},
-        {100, 100, 100, 100, 100, 86, 68, 50},
-        {100, 100, 100, 100, 100, 89, 71, 53},
-        {100, 100, 100, 100, 100, 100, 95, 90}
+            {-1, -1, -1, 50, 44, 26, 8, 0},
+            {83, 74, 65, 56, 47, 29, 11, 0},
+            {86, 77, 68, 59, 50, 32, 14, 0},
+            {89, 80, 71, 62, 53, 35, 17, 0},
+            {92, 83, 74, 65, 56, 38, 20, 2},
+            {95, 86, 77, 68, 59, 41, 23, 5},
+            {98, 89, 80, 71, 62, 44, 26, 8},
+            {100, 92, 83, 74, 65, 47, 29, 11},
+            {100, 95, 86, 77, 68, 50, 32, 14},
+            {100, 98, 89, 80, 71, 53, 35, 17},
+            {100, 100, 92, 83, 74, 56, 38, 20},
+            {100, 100, 95, 86, 77, 59, 41, 23},
+            {100, 100, 98, 89, 80, 62, 44, 26},
+            {100, 100, 100, 92, 83, 65, 47, 29},
+            {100, 100, 100, 95, 86, 68, 50, 32},
+            {100, 100, 100, 98, 89, 71, 53, 35},
+            {100, 100, 100, 100, 92, 74, 56, 38},
+            {100, 100, 100, 100, 95, 77, 59, 41},
+            {100, 100, 100, 100, 98, 80, 62, 44},
+            {100, 100, 100, 100, 100, 83, 65, 47},
+            {100, 100, 100, 100, 100, 86, 68, 50},
+            {100, 100, 100, 100, 100, 89, 71, 53},
+            {100, 100, 100, 100, 100, 100, 95, 90}
     };
-    
+
     protected int IMP(int punkty) {
         int i = 0;
-        while( IMP[i+1] <= punkty ) {
+        while (IMP[i + 1] <= punkty) {
             i++;
         }
         return i;
     }
-    
+
     protected int procenty(int PC, int punkty, int partia) {
         int punkty_i = 0;
         int PC_i = 0;
-        
-        while(this.procenty_punkty[partia][punkty_i+1] <= punkty) {
+
+        while (this.procenty_punkty[partia][punkty_i + 1] <= punkty) {
             punkty_i++;
         }
-        
-        while(this.procenty_PC[PC_i+1] <= PC) {
+
+        while (this.procenty_PC[PC_i + 1] <= PC) {
             PC_i++;
         }
-        
+
         return this.procenty[punkty_i][PC_i];
     }
-    
+
     public BrydzWynik policz(int kontrakt, int kolor, int kontra, int partia, int PC, int lewy) {
         BrydzWynik wynik = new BrydzWynik();
         int my_partia = partia / 2;
         int wy_partia = partia % 2;
-        
+
         // 4 pasy
-        if( kontrakt == 0 ) {
+        if (kontrakt == 0) {
             wynik.dla = 1;
             wynik.punkty = this.PC[my_partia][wy_partia][PC];
             wynik.IMP = this.IMP(wynik.punkty);
-            wynik.procent = 100-this.procenty(PC, 0, my_partia);
-            
+            wynik.procent = 100 - this.procenty(PC, 0, my_partia);
+
             return wynik;
         }
-        
-        
+
+
         // Wynik w punktach
         int wynik_punkty;
         // Punkty za lewy kontraktowe
         int wynik_lewy;
         // Wynik w punktach, uwzględniając ilość PC
         int wynik_punkty_PC;
-        
+
         // Ilość nadróbek
         int nadrobki = lewy - 6 - kontrakt;
-        
+
         // Mnożnik przy kontrze
-        int mnoznik = kontra+1;
-        if( mnoznik == 3 ) {
+        int mnoznik = kontra + 1;
+        if (mnoznik == 3) {
             mnoznik = 4;
         }
-        
+
         // Kontrakt ugrany
-        if( nadrobki >= 0 ) {
+        if (nadrobki >= 0) {
             // "Nadróbki: jak za lewy"
-            if( mnoznik == 1 ) {
+            if (mnoznik == 1) {
                 wynik_lewy = this.lewy[kolor][kontrakt];
                 wynik_punkty = this.lewy[kolor][lewy - 6];
             }
             // Kontra lub rekontra
-            else
-            {
+            else {
                 wynik_lewy = this.lewy[kolor][kontrakt] * mnoznik;
                 wynik_punkty = wynik_lewy;
-                
+
                 // Za wygranie z kontrą
                 wynik_punkty += 25 * mnoznik;
                 // Za nadróbki
                 wynik_punkty += nadrobki * (my_partia == 0 ? 50 : 100) * mnoznik;
             }
-            
-            if(kontrakt == 6) {
+
+            if (kontrakt == 6) {
                 // Za szlemika
                 wynik_punkty += (my_partia == 0 ? 500 : 750);
-            }
-            else if(kontrakt == 7) {
+            } else if (kontrakt == 7) {
                 // Za szlema
                 wynik_punkty += (my_partia == 0 ? 1000 : 1500);
             }
-            
-            if(wynik_lewy >= 100) {
+
+            if (wynik_lewy >= 100) {
                 // Za partię
                 wynik_punkty += (my_partia == 0 ? 300 : 500);
-            }
-            else
-            {
+            } else {
                 // Za częściówkę
                 wynik_punkty += 50;
             }
         }
         // Wpadka
-        else
-        {
+        else {
             // Punkty za wpadkę
             wynik_punkty = -1 * this.wpadki[my_partia][kontra][-1 * nadrobki];
         }
-        
+
         // Uwzględniamy ilość punktów, którą trzeba było zdobyć
         wynik_punkty_PC = wynik_punkty - this.PC[my_partia][wy_partia][PC];
-        
+
         // Zapis dla przeciwników
-        if( wynik_punkty_PC < 0 ) {
+        if (wynik_punkty_PC < 0) {
             wynik.dla = 1;
             wynik.punkty_przed = -1 * wynik_punkty;
             wynik.punkty = -1 * wynik_punkty_PC;
             wynik.IMP = IMP(wynik.punkty);
-            if( wynik_punkty < 0 ) {
+            if (wynik_punkty < 0) {
                 wynik.procent = procenty(40 - PC, -1 * wynik_punkty, wy_partia);
-            }
-            else
-            {
+            } else {
                 wynik.procent = 100 - procenty(PC, wynik_punkty, my_partia);
             }
         }
         // Zapis dla rozgrywających
-        else
-        {
+        else {
             wynik.dla = 0;
             wynik.punkty_przed = wynik_punkty;
             wynik.punkty = wynik_punkty_PC;
             wynik.IMP = IMP(wynik.punkty);
-            if( wynik_punkty > 0 ) {
+            if (wynik_punkty > 0) {
                 wynik.procent = procenty(PC, wynik_punkty, my_partia);
-            }
-            else
-            {
+            } else {
                 wynik.procent = 100 - procenty(40 - PC, -1 * wynik_punkty, wy_partia);
             }
         }
-        
+
         return wynik;
     }
 }
diff --git a/app/src/main/java/net/jacekk/bridge/BridgeCompute.java b/app/src/main/java/net/jacekk/bridge/BridgeCompute.java
index 57fd304..202189a 100644
--- a/app/src/main/java/net/jacekk/bridge/BridgeCompute.java
+++ b/app/src/main/java/net/jacekk/bridge/BridgeCompute.java
@@ -1,50 +1,33 @@
 package net.jacekk.bridge;
 
+import java.util.Arrays;
+
 public class BridgeCompute {
-    // Points for tricks
-    protected int tricks[][] = {
-            {0, 20, 40, 60, 80, 100, 120, 140},  // minor suits
-            {0, 30, 60, 90, 120, 150, 180, 210}, // major suits
-            {0, 40, 70, 100, 130, 160, 190, 220} // no trump
-    };
+
+    // Points for tricks (minor, major, no trump)
+    protected int tricks[] = {20, 30, 30};
 
     // Points for [i] undertricks
     protected int undertricks[][][] = {
             {   // non vulnerable
-                    {0, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650},            // normal
-                    {0, 100, 300, 500, 700, 900, 1100, 1300, 1500, 1700, 1900, 2100, 2300, 2500},   // double
+                    {0, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650},// normal
+                    {0, 100, 300, 500, 700, 900, 1100, 1300, 1500, 1700, 1900, 2100, 2300, 2500},// double
                     {0, 200, 600, 1000, 1400, 1800, 2200, 2600, 3000, 3400, 3800, 4200, 4600, 5000} // redouble
             },
             {   // vulnerable
-                    {0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300},       // normal
-                    {0, 200, 500, 800, 1100, 1400, 1700, 2000, 2300, 2600, 2900, 3200, 3500, 3800}, // double
-                    {0, 400, 1000, 1600, 2200, 2800, 3400, 4000, 4600, 5200, 5800, 6400, 7000, 7600}// redouble
+                    {0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300},// normal
+                    {0, 200, 500, 800, 1100, 1400, 1700, 2000, 2300, 2600, 2900, 3200, 3500, 3800},// double
+                    {0, 400, 1000, 1600, 2200, 2800, 3400, 4000, 4600, 5200, 5800, 6400, 7000, 7600} // redouble
             }
     };
 
-    // Points required per Milton Work Point Count
-    protected int PC[][][] = {
-            {   // We: non vulnerable, they: non vulnerable
-                    {-1400, -1400, -1400, -1400, -1200, -1100, -1000,  -900,  -700,  -600,  -490,
-                             -460,  -430,  -400,  -350,  -300,  -200,  -110,   -70,   -50,     0,
-                               50,    70,   110,   200,   300,   350,   400,   430,   460,   490,
-                              600,   700,   900,  1000,  1100,  1200,  1400,  1400,  1400,  1400},
-                // We: non vulnerable, they: vulnerable
-                    {-2100, -2100, -2100, -2100, -1800, -1650, -1500, -1350, -1050,  -800,  -690,
-                             -660,  -630,  -600,  -520,  -440,  -290,  -110,   -70,   -50,     0,
-                               50,    70,   110,   200,   300,   350,   400,   430,   460,   490,
-                              600,   700,   900,  1000,  1100,  1200,  1400,  1400,  1400,  1400}
+    // Points required per Milton Work Point Count (from 20 up)
+    protected int PC[][] = {
+            {0, 50, 70, 110, 200, 300, 350, 400, 430, 460, 490, 600, 700, 900,
+                    1000, 1100, 1200, 1400, 1400, 1400, 1400
             },
-            {   // We: vulnerable, they: non vulnerable
-                    {-1400, -1400, -1400, -1400, -1200, -1100, -1000,  -900,  -700,  -600,  -490,
-                             -460,  -430,  -400,  -350,  -300,  -200,  -110,   -70,   -50,     0,
-                               50,    70,   110,   290,   440,   520,   600,   630,   660,   690,
-                              800,  1050,  1350,  1500,  1650,  1800,  2100,  2100,  2100,  2100},
-                // We: vulnerable, they: vulnerable
-                    {-2100, -2100, -2100, -2100, -1800, -1650, -1500, -1350, -1050,  -800,  -690,
-                             -660,  -630,  -600,  -520,  -440,  -290,  -110,   -70,   -50,     0,
-                               50,    70,   110,   290,   440,   520,   600,   630,   660,   690,
-                              800,  1050,  1350,  1500,  1650,  1800,  2100,  2100,  2100,  2100}
+            {0, 50, 70, 110, 290, 440, 520, 600, 630, 660, 690, 800, 1050, 1350,
+                    1500, 1650, 1800, 2100, 2100, 2100, 2100
             }
     };
 
@@ -57,17 +40,17 @@
     // See: http://www.gplewniak.republika.pl/strony/zapis.html
 
     // Points received - [i] used to access row from percent variable
-    protected int percent_points[][] = {
+    protected int percentPoints[][] = {
             {0, 50, 90, 120, 150, 180, 210, 300, 400, 430, 460, 490, 520, 800, 920, 940, 980, 990,
                     1020, 1400, 1440, 1520, 1530, 9999999}, // non vulnerable
-            {0, 50, 90, 120, 150, 180, 210, 500, 600, 360, 660, 690, 720, 810, 1370, 1390, 1430,
+            {0, 50, 90, 120, 150, 180, 210, 500, 600, 630, 660, 690, 720, 810, 1370, 1390, 1430,
                     1440, 1470, 1700, 2000, 2220, 2230, 9999999} // vulnerable
     };
 
     // Work Point Count - [i] used to access column from property percent
-    protected int percent_PC[] = {0, 6, 10, 16, 21, 25, 31, 35, 9999999};
+    protected int percentPCs[] = {0, 6, 10, 16, 21, 25, 31, 35, 9999999};
 
-    // Percent score per [i] - points scored, [j] - PC had
+    // Percent score per [i] - points scored, [j] - PCs had
     protected int percent[][] = {
             {-1, -1, -1, 50, 44, 26, 8, 0},
             {83, 74, 65, 56, 47, 29, 11, 0},
@@ -95,130 +78,163 @@
     };
 
     // Finds IMP score for points given (using IMPs property)
-    protected int IMP(int points) {
-        int i = 0;
-        while (IMPs[i + 1] <= points) {
-            i++;
+    protected int getIMPs(int points) {
+        int position = Arrays.binarySearch(this.IMPs, points);
+        if (position < 0) {
+            return -position - 2;
         }
-        return i;
+        return position;
     }
 
     // Finds percent score for data given (using percent* properties)
-    protected int percent(int PC, int points, int vulnerability) {
-        int points_i = 0;
-        int PC_i = 0;
+    protected int getPercent(int PC, int points, int vulnerability) {
+        int positionPoints = Arrays.binarySearch(this.percentPoints[vulnerability], points);
+        int positionPCs = Arrays.binarySearch(this.percentPCs, PC);
+        if (positionPoints < 0) positionPoints = -positionPoints - 2;
+        if (positionPCs < 0) positionPCs = -positionPCs - 2;
 
-        while (this.percent_points[vulnerability][points_i + 1] <= points) {
-            points_i++;
-        }
-
-        while (this.percent_PC[PC_i + 1] <= PC) {
-            PC_i++;
-        }
-
-        return this.percent[points_i][PC_i];
+        return this.percent[positionPoints][positionPCs];
     }
 
-    public BridgeResult compute(int bid, int color, int dbl, int vulnerability, int PC, int tricks) {
+    public void validateInput(BridgeInput input) throws BridgeInputException {
+        if (input.bid < 0 || input.bid > 7) {
+            throw new BridgeInputException(BridgeInputException.Error.CONTRACT_LEVEL_INVALID);
+        }
+
+        if (input.suit == null) {
+            throw new BridgeInputException(BridgeInputException.Error.CONTRACT_SUIT_INVALID);
+        }
+
+        if (input.contract == null) {
+            throw new BridgeInputException(BridgeInputException.Error.CONTRACT_DOUBLE_INVALID);
+        }
+
+        if (input.PC < 0 || input.PC > 40) {
+            throw new BridgeInputException(BridgeInputException.Error.PC_INVALID);
+        }
+
+        if (input.tricks < 0 || input.tricks > 13) {
+            throw new BridgeInputException(BridgeInputException.Error.TRICKS_INVALID);
+        }
+
+        if (input.bid == 0 && input.PC < 20) {
+            throw new BridgeInputException(BridgeInputException.Error.PASSES_INVALID);
+        }
+    }
+
+    public BridgeResult getResultForInput(BridgeInput input) throws BridgeInputException {
+        validateInput(input);
+
+        int weVulnerable = (input.weVulnerable) ? 1 : 0;
+        int theyVulnerable = (input.theyVulnerable) ? 1 : 0;
+        int bid = input.bid;
+
         BridgeResult result = new BridgeResult();
-        int weVulnerable = vulnerability / 2;
-        int theyVulnerable = vulnerability % 2;
 
         // 4 passes
-        if (bid == 0) {
-            result.pointsFor = BridgeResult.PointsFor.Them;
-            result.points = this.PC[weVulnerable][theyVulnerable][PC];
-            result.IMPs = this.IMP(result.points);
-            result.percent = 100 - this.percent(PC, 0, weVulnerable);
-
+        if (input.bid == 0) {
+            result.winners = BridgeResult.Side.They;
+            result.points = this.PC[weVulnerable][input.PC - 20];
+            result.IMPs = this.getIMPs(result.points);
+            result.percent = 100 - this.getPercent(input.PC, 0, weVulnerable);
             return result;
         }
 
 
+        int multiplier = input.contract.multiplier;
+        int dbl = input.contract.tableIndex;
+        int tricks = input.tricks;
+
         // Result in points
-        int resultPoints;
-        // Points for tricks
-        int pointsForTricks;
+        int points;
+        // Points for tricks bid
+        int pointsForTricksBid;
         // Result minus points required, according to PC property
         int pointsForScoring;
 
         // Number of overtricks (or undertricks if negative)
         int additionalTricks = tricks - 6 - bid;
 
-        // Double/redouble multiplier
-        int multiplier = dbl + 1;
-        if (multiplier == 3) {
-            multiplier = 4;
-        }
-
         // Contract made
         if (additionalTricks >= 0) {
+            pointsForTricksBid = this.tricks[input.suit.tableIndex] * bid * multiplier;
+            if (input.suit.equals(BridgeInput.Suit.NOTRUMP)) {
+                // First trick in no trump game is worth 10 points more
+                pointsForTricksBid += 10 * multiplier;
+            }
+            points = pointsForTricksBid;
+
+            // Add points for overtricks
+
             // Ordinary contract
-            if (multiplier == 1) {
-                pointsForTricks = this.tricks[color][bid];
-                resultPoints = this.tricks[color][tricks - 6];
+            if (input.contract.equals(BridgeInput.Contract.NORMAL)) {
+                points += this.tricks[input.suit.tableIndex] * additionalTricks;
             }
             // Contract doubled/redoubled
             else {
-                pointsForTricks = this.tricks[color][bid] * multiplier;
-                resultPoints = pointsForTricks;
+                points += (!input.weVulnerable ? 50 : 100) * multiplier * additionalTricks;
 
                 // Bonus for winning doubled/redoubled contract
-                resultPoints += 25 * multiplier;
-                // For overtricks
-                resultPoints += additionalTricks * (weVulnerable == 0 ? 50 : 100) * multiplier;
+                points += 25 * multiplier;
             }
 
             if (bid == 6) {
                 // Bonus for small slam
-                resultPoints += (weVulnerable == 0 ? 500 : 750);
+                points += (!input.weVulnerable ? 500 : 750);
             } else if (bid == 7) {
                 // Bonus for grand slam
-                resultPoints += (weVulnerable == 0 ? 1000 : 1500);
+                points += (!input.weVulnerable ? 1000 : 1500);
             }
 
-            if (pointsForTricks >= 100) {
+            if (pointsForTricksBid >= 100) {
                 // Bonus for game
-                resultPoints += (weVulnerable == 0 ? 300 : 500);
+                points += (!input.weVulnerable ? 300 : 500);
             } else {
                 // Bonus for part-game
-                resultPoints += 50;
+                points += 50;
             }
         }
         // Contract defeated
         else {
             // Points for undertricks (for defending side)
-            resultPoints = -1 * this.undertricks[weVulnerable][dbl][-1 * additionalTricks];
+            points = -1 * this.undertricks[weVulnerable][dbl][-1 * additionalTricks];
         }
 
         // Deduct points required
-        pointsForScoring = resultPoints - this.PC[weVulnerable][theyVulnerable][PC];
+        if (input.PC >= 20) {
+            pointsForScoring = points - this.PC[weVulnerable][input.PC - 20];
+        } else {
+            pointsForScoring = points + this.PC[theyVulnerable][20 - input.PC];
+        }
 
         // Score for defeaters
         if (pointsForScoring < 0) {
-            result.pointsFor = BridgeResult.PointsFor.Them;
-            result.pointsBefore = -1 * resultPoints;
+            result.winners = BridgeResult.Side.They;
+            result.pointsBefore = -1 * points;
             result.points = -1 * pointsForScoring;
-            result.IMPs = IMP(result.points);
-            if (resultPoints < 0) {
-                result.percent = percent(40 - PC, -1 * resultPoints, theyVulnerable);
+
+            if (points < 0) {
+                result.percent = getPercent(40 - input.PC, -points, theyVulnerable);
             } else {
-                result.percent = 100 - percent(PC, resultPoints, weVulnerable);
+                result.percent = 100 - getPercent(input.PC, points, weVulnerable);
             }
         }
         // Score for declarers
         else {
-            result.pointsFor = BridgeResult.PointsFor.Us;
-            result.pointsBefore = resultPoints;
+            result.winners = BridgeResult.Side.We;
+            result.pointsBefore = points;
             result.points = pointsForScoring;
-            result.IMPs = IMP(result.points);
-            if (resultPoints > 0) {
-                result.percent = percent(PC, resultPoints, weVulnerable);
+
+            if (points > 0) {
+                result.percent = getPercent(input.PC, points, weVulnerable);
             } else {
-                result.percent = 100 - percent(40 - PC, -1 * resultPoints, theyVulnerable);
+                result.percent = 100 - getPercent(40 - input.PC, -points, theyVulnerable);
             }
         }
 
+        result.IMPs = getIMPs(result.points);
+
+
         return result;
     }
 }
diff --git a/app/src/main/java/net/jacekk/bridge/BridgeInput.java b/app/src/main/java/net/jacekk/bridge/BridgeInput.java
index e47323d..baf18a2 100644
--- a/app/src/main/java/net/jacekk/bridge/BridgeInput.java
+++ b/app/src/main/java/net/jacekk/bridge/BridgeInput.java
@@ -1,7 +1,51 @@
 package net.jacekk.bridge;
 
-/**
- * Created by jacek on 18.01.15.
- */
 public class BridgeInput {
+    public enum Suit {
+        MINOR(0), MAJOR(1), NOTRUMP(2);
+
+        public final int tableIndex;
+
+        Suit(int tableIndex) {
+            this.tableIndex = tableIndex;
+        }
+    }
+
+    public enum Contract {
+        NORMAL(1, 0), DOUBLED(2, 1), REDOUBLED(4, 2);
+
+        public final int multiplier;
+        public final int tableIndex;
+
+        Contract(int multiplier, int tableIndex) {
+            this.multiplier = multiplier;
+            this.tableIndex = tableIndex;
+        }
+    }
+
+    public int bid;
+    public Suit suit;
+    public Contract contract;
+    public boolean weVulnerable;
+    public boolean theyVulnerable;
+    public int PC;
+    public int tricks;
+
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append(bid).append(' ').append(suit.name()).append(' ');
+        builder.append(contract.name()).append(' ');
+
+        if (weVulnerable)
+            builder.append('V');
+        else
+            builder.append('N');
+        if (theyVulnerable)
+            builder.append('V');
+        else
+            builder.append('N');
+        builder.append(' ');
+        builder.append(PC).append("PC, tricks: ").append(tricks);
+        return builder.toString();
+    }
 }
diff --git a/app/src/main/java/net/jacekk/bridge/BridgeInputException.java b/app/src/main/java/net/jacekk/bridge/BridgeInputException.java
index 8b3c0f6..f61f66f 100644
--- a/app/src/main/java/net/jacekk/bridge/BridgeInputException.java
+++ b/app/src/main/java/net/jacekk/bridge/BridgeInputException.java
@@ -1,7 +1,19 @@
 package net.jacekk.bridge;
 
-/**
- * Created by jacek on 18.01.15.
- */
-public class BridgeInputException {
+public class BridgeInputException extends Exception {
+    public enum Error {
+        CONTRACT_LEVEL_INVALID, CONTRACT_SUIT_INVALID,
+        CONTRACT_DOUBLE_INVALID, PC_INVALID,
+        TRICKS_INVALID, PASSES_INVALID
+    }
+
+    final Error error;
+
+    public BridgeInputException(Error error) {
+        this.error = error;
+    }
+
+    public Error getError() {
+        return error;
+    }
 }
diff --git a/app/src/main/java/net/jacekk/bridge/BridgeResult.java b/app/src/main/java/net/jacekk/bridge/BridgeResult.java
index 090cc20..c637519 100644
--- a/app/src/main/java/net/jacekk/bridge/BridgeResult.java
+++ b/app/src/main/java/net/jacekk/bridge/BridgeResult.java
@@ -1,11 +1,11 @@
 package net.jacekk.bridge;
 
 public class BridgeResult {
-    public enum PointsFor {
-        Us, Them
+    public enum Side {
+        We, They
     }
 
-    public PointsFor pointsFor;
+    public Side winners;
     public int pointsBefore;
     public int points;
     public int IMPs;
diff --git a/app/src/main/java/net/jacekk/bridge/android/BridgeInputExceptionMapper.java b/app/src/main/java/net/jacekk/bridge/android/BridgeInputExceptionMapper.java
index 7f929c0..d225598 100644
--- a/app/src/main/java/net/jacekk/bridge/android/BridgeInputExceptionMapper.java
+++ b/app/src/main/java/net/jacekk/bridge/android/BridgeInputExceptionMapper.java
@@ -1,7 +1,25 @@
 package net.jacekk.bridge.android;
 
-/**
- * Created by jacek on 18.01.15.
- */
+import net.jacekk.bridge.BridgeInputException;
+import net.jacekk.bridge.R;
+
+import java.util.HashMap;
+import java.util.Map;
+
 public class BridgeInputExceptionMapper {
+    public static final Map<BridgeInputException.Error, Integer> errorMap;
+
+    static {
+        errorMap = new HashMap<>();
+        errorMap.put(BridgeInputException.Error.CONTRACT_LEVEL_INVALID, R.string.invalid_level);
+        errorMap.put(BridgeInputException.Error.CONTRACT_SUIT_INVALID, R.string.invalid_color);
+        errorMap.put(BridgeInputException.Error.CONTRACT_DOUBLE_INVALID, R.string.invalid_contract);
+        errorMap.put(BridgeInputException.Error.PC_INVALID, R.string.invalid_pc);
+        errorMap.put(BridgeInputException.Error.TRICKS_INVALID, R.string.invalid_tricks);
+        errorMap.put(BridgeInputException.Error.PASSES_INVALID, R.string.invalid_passes);
+    }
+
+    public static int map(BridgeInputException e) {
+        return errorMap.get(e.getError());
+    }
 }
diff --git a/app/src/main/java/net/jacekk/bridge/android/MainActivity.java b/app/src/main/java/net/jacekk/bridge/android/MainActivity.java
index 9c60f4e..eb1677f 100644
--- a/app/src/main/java/net/jacekk/bridge/android/MainActivity.java
+++ b/app/src/main/java/net/jacekk/bridge/android/MainActivity.java
@@ -10,9 +10,11 @@
 import android.widget.TextView;
 import android.widget.ToggleButton;
 
-import net.jacekk.bridge.R;
 import net.jacekk.bridge.BridgeCompute;
+import net.jacekk.bridge.BridgeInput;
+import net.jacekk.bridge.BridgeInputException;
 import net.jacekk.bridge.BridgeResult;
+import net.jacekk.bridge.R;
 
 public class MainActivity extends Activity {
     private SeekBar BidSlider;
@@ -34,7 +36,7 @@
     private EditText PCInput;
     private EditText TricksInput;
 
-    private TextView resultText;
+    private TextView ResultsText;
 
     public BridgeCompute bridgeCompute;
 
@@ -49,15 +51,14 @@
         InitializeApp();
     }
 
-    @Override
-    public void onBackPressed() {
-        // Reset
+    private void resetInputs() {
         BidSlider.setProgress(0);
         MinorSuitsToggle.setChecked(true);
         ContractToggle.setChecked(true);
         NNToggle.setChecked(true);
         PCInput.setText("");
         TricksInput.setText("");
+        ResultsText.setText(getString(R.string.enter_data));
     }
 
     private void InitializeApp() {
@@ -82,7 +83,7 @@
         PCInput = (EditText) findViewById(R.id.PCInput);
         TricksInput = (EditText) findViewById(R.id.TricksInput);
 
-        resultText = (TextView) findViewById(R.id.ResultsText);
+        ResultsText = (TextView) findViewById(R.id.ResultsText);
 
         CompoundButton.OnCheckedChangeListener changeListener;
 
@@ -203,6 +204,27 @@
     }
 
     public void updateResults() {
+        BridgeInput input = getBridgeInput();
+
+        BridgeResult result;
+        try {
+            result = bridgeCompute.getResultForInput(input);
+        } catch (BridgeInputException e) {
+            int errorStringId = BridgeInputExceptionMapper.map(e);
+            ResultsText.setText(getString(errorStringId));
+            return;
+        }
+
+        ResultsText.setText(
+                (result.winners == BridgeResult.Side.We ? getString(R.string.result_for_us)
+                        : getString(R.string.result_for_them)) +
+                        "\n" + getString(R.string.result_pts_wo_pc) + " " + result.pointsBefore +
+                        "\n" + getString(R.string.result_pts) + " " + result.points +
+                        "\n" + getString(R.string.result_imps) + " " + result.IMPs +
+                        "\n" + getString(R.string.result_percent) + " " + result.percent);
+    }
+
+    private BridgeInput getBridgeInput() {
         int bid = BidSlider.getProgress();
 
         int color = 0;
@@ -237,47 +259,14 @@
         } catch (NumberFormatException ignored) {
         }
 
-        if (bid < 0 || bid > 7) {
-            resultText.setText(getString(R.string.invalid_bid));
-            return;
-        }
-
-        if (color != 0 && color != 1 && color != 2) {
-            resultText.setText(getString(R.string.invalid_color));
-            return;
-        }
-
-        if (dbl < 0 || dbl > 2) {
-            resultText.setText(getString(R.string.invalid_dbl));
-            return;
-        }
-
-        if (vulnerability < 0 || vulnerability > 3) {
-            resultText.setText(getString(R.string.invalid_baba));
-            return;
-        }
-
-        if (PC < 0 || PC > 40) {
-            resultText.setText(getString(R.string.invalid_pc));
-            return;
-        }
-
-        if (tricks < 0 || tricks > 13) {
-            resultText.setText(getString(R.string.invalid_tricks));
-            return;
-        }
-
-        if (bid == 0 && PC < 20) {
-            resultText.setText(getString(R.string.invalid_pass));
-            return;
-        }
-
-        BridgeResult result = bridgeCompute.compute(bid, color, dbl, vulnerability, PC, tricks);
-        resultText.setText(
-                (result.pointsFor == BridgeResult.PointsFor.Us ? getString(R.string.result_for_us) : getString(R.string.result_for_them)) +
-                        "\n" + getString(R.string.result_pts_wo_pc) + " " + result.pointsBefore +
-                        "\n" + getString(R.string.result_pts) + " " + result.points +
-                        "\n" + getString(R.string.result_imps) + " " + result.IMPs +
-                        "\n" + getString(R.string.result_percent) + " " + result.percent);
+        BridgeInput input = new BridgeInput();
+        input.bid = bid;
+        input.suit = BridgeInput.Suit.values()[color];
+        input.contract = BridgeInput.Contract.values()[dbl];
+        input.weVulnerable = vulnerability / 2 >= 1;
+        input.theyVulnerable = vulnerability % 2 >= 1;
+        input.PC = PC;
+        input.tricks = tricks;
+        return input;
     }
 }
diff --git a/app/src/main/res/layout/main.xml b/app/src/main/res/layout/main.xml
index 6683a97..d31e456 100644
--- a/app/src/main/res/layout/main.xml
+++ b/app/src/main/res/layout/main.xml
@@ -55,9 +55,9 @@
             android:layout_height="wrap_content"
             android:layout_weight="0.25"
             android:checked="false"
-            android:text="@string/no_trumph"
-            android:textOff="@string/no_trumph"
-            android:textOn="@string/no_trumph" />
+            android:text="@string/no_trump"
+            android:textOff="@string/no_trump"
+            android:textOn="@string/no_trump" />
     </LinearLayout>
 
     <LinearLayout
@@ -189,7 +189,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginTop="10dp"
-        android:text="@string/invalid_empty"
+        android:text="@string/enter_data"
         android:textAppearance="?android:attr/textAppearanceMedium" />
 </LinearLayout>
 
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index b607da1..29d49e9 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -4,7 +4,7 @@
 
     <string name="minor_suits">♣ / ♦</string>
     <string name="major_suits">♥ / ♠</string>
-    <string name="no_trumph">NT</string>
+    <string name="no_trump">NT</string>
 
     <string name="before_before">przed/przed</string>
     <string name="before_after">przed/po</string>
@@ -18,14 +18,14 @@
     <string name="pc">PC:</string>
     <string name="tricks">Lew:</string>
 
-    <string name="invalid_empty">Podaj wszystkie dane.</string>
-    <string name="invalid_bid">Niepoprawny kontrakt.</string>
+    <string name="enter_data">Podaj wszystkie dane.</string>
+    <string name="invalid_level">Niepoprawny kontrakt.</string>
     <string name="invalid_color">Niepoprawny kolor kontraktu.</string>
-    <string name="invalid_dbl">Niepoprawna informacja o kontrze.</string>
-    <string name="invalid_baba">Niepoprawna informacja o partii.</string>
+    <string name="invalid_contract">Niepoprawna informacja o kontrze.</string>
+    <string name="invalid_vulnerability">Niepoprawna informacja o partii.</string>
     <string name="invalid_pc">Niepoprawna ilość punktów.</string>
     <string name="invalid_tricks">Niepoprawna ilość wziętych lew.</string>
-    <string name="invalid_pass">Przy czterech pasach podaj większą liczę punktów.</string>
+    <string name="invalid_passes">Przy czterech pasach podaj większą liczę punktów.</string>
 
     <string name="result_for_us">Zapis dla rozgrywających.</string>
     <string name="result_for_them">Zapis dla przeciwników.</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6ffd67e..dda0d92 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -4,11 +4,11 @@
 
     <string name="minor_suits">♣ / ♦</string>
     <string name="major_suits">♥ / ♠</string>
-    <string name="no_trumph">NT</string>
+    <string name="no_trump">NT</string>
 
     <string name="before_before">non./non</string>
     <string name="before_after">non./vuln.</string>
-    <string name="after_before">vunl./non.</string>
+    <string name="after_before">vuln./non.</string>
     <string name="after_after">vuln./vuln.</string>
 
     <string name="bid_normal">norm.</string>
@@ -18,14 +18,14 @@
     <string name="pc">PC:</string>
     <string name="tricks">Tricks:</string>
 
-    <string name="invalid_empty">Enter required information.</string>
-    <string name="invalid_bid">Invalid contract level.</string>
+    <string name="enter_data">Enter required information.</string>
+    <string name="invalid_level">Invalid contract level.</string>
     <string name="invalid_color">Invalid contract color.</string>
-    <string name="invalid_dbl">Invalid information about doubling/redoubling.</string>
-    <string name="invalid_baba">Invalid information about vulnerability.</string>
+    <string name="invalid_contract">Invalid information about doubling/redoubling.</string>
+    <string name="invalid_vulnerability">Invalid information about vulnerability.</string>
     <string name="invalid_pc">Invalid number for Milton Work Point Count.</string>
     <string name="invalid_tricks">Invalid number of tricks taken.</string>
-    <string name="invalid_pass">For four passes enter data for side with more PCs.</string>
+    <string name="invalid_passes">For four passes enter data for side with more PCs.</string>
 
     <string name="result_for_us">Score for declaring side.</string>
     <string name="result_for_them">Score for defending side.</string>

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