diff --git a/app/src/main/java/sudoku/Bloc.java b/app/src/main/java/sudoku/Bloc.java
deleted file mode 100644
index ca9069b..0000000
--- a/app/src/main/java/sudoku/Bloc.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package sudoku;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class Bloc {
-
-	private final List<Case> cases;
-
-	public Bloc(List<Case> cases) {
-		this.cases = cases;
-	}
-
-	public Bloc() {
-		this.cases = new ArrayList<>();
-	}
-
-	public List<Case> getCases() {
-		return cases;
-	}
-
-	void addCase(Case newCase) {
-		this.cases.add(newCase);
-	}
-
-}
diff --git a/app/src/main/java/sudoku/Block.java b/app/src/main/java/sudoku/Block.java
new file mode 100644
index 0000000..ec12bc4
--- /dev/null
+++ b/app/src/main/java/sudoku/Block.java
@@ -0,0 +1,26 @@
+package sudoku;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Block {
+
+	private final List<Cell> cells;
+
+	public Block(List<Cell> cells) {
+		this.cells = cells;
+	}
+
+	public Block() {
+		this.cells = new ArrayList<>();
+	}
+
+	public List<Cell> getCells() {
+		return cells;
+	}
+
+	void addCell(Cell newCell) {
+		this.cells.add(newCell);
+	}
+
+}
diff --git a/app/src/main/java/sudoku/Case.java b/app/src/main/java/sudoku/Cell.java
similarity index 56%
rename from app/src/main/java/sudoku/Case.java
rename to app/src/main/java/sudoku/Cell.java
index 7f340ad..36d9d3b 100644
--- a/app/src/main/java/sudoku/Case.java
+++ b/app/src/main/java/sudoku/Cell.java
@@ -1,19 +1,19 @@
 package sudoku;
 
-public class Case {
+public class Cell {
 
 	private static int NOSYMBOLE = -1;
 	private int symboleIndex;
-	private Bloc bloc = null;
+	private Block block = null;
 
-	public Case(int symboleIndex) {
+	public Cell(int symboleIndex) {
 		this.symboleIndex = symboleIndex;
 	}
 
 	/**
 	 * @brief Default constructor, empty square
 	 */
-	public Case() {
+	public Cell() {
 		this(NOSYMBOLE);
 	}
 
@@ -29,18 +29,19 @@ public class Case {
 		setSymboleIndex(NOSYMBOLE);
 	}
 
-	public Bloc getBloc() {
-		return this.bloc;
+	public Block getBlock() {
+		return this.block;
 	}
 
-	void setBloc(Bloc bloc) {
-		this.bloc = bloc;
+	// only SudokuFactory should access this
+	void setBlock(Block block) {
+		this.block = block;
 	}
 
 	@Override
 	public boolean equals(Object obj) {
-		if (obj instanceof Case autreCase)
-			return autreCase.getSymboleIndex() == this.getSymboleIndex();
-		return super.equals(obj);
+		if (obj instanceof Cell otherCell)
+			return otherCell.getSymboleIndex() == this.getSymboleIndex();
+		return false;
 	}
 }
diff --git a/app/src/main/java/sudoku/Sudoku.java b/app/src/main/java/sudoku/Sudoku.java
index da29fba..3e0fded 100644
--- a/app/src/main/java/sudoku/Sudoku.java
+++ b/app/src/main/java/sudoku/Sudoku.java
@@ -8,29 +8,22 @@ import java.util.List;
  */
 public class Sudoku {
 
-	private final List<Bloc> blocs;
-	private final List<Case> cases;
+	private final List<Block> blocks;
+	private final List<Cell> cells;
 
-	public Sudoku(List<Case> cases, List<Bloc> blocs) {
-		// assert(symbolCount >= 2);
-		// // initialisation des cases
-		// this.cases = new ArrayList<>(symbolCount * symbolCount);
-		// Collections.fill(this.cases, new Case());
-		// // initialisation des blocs
-		// this.blocs = new ArrayList<>(symbolCount);
-		// Collections.fill(this.blocs, new Bloc(null));
-		this.cases = cases;
-		this.blocs = blocs;
+	public Sudoku(List<Cell> cells, List<Block> blocks) {
+		this.cells = cells;
+		this.blocks = blocks;
 	}
 
-	public Case getCase(int x, int y) {
+	public Cell getCell(int x, int y) {
 		int index = y * getSize() + x;
 		assert(index < getSize() * getSize());
-		return this.cases.get(index);
+		return this.cells.get(index);
 	}
 
 	public int getSize() {
-		return this.blocs.size();
+		return this.blocks.size();
 	}
 
 }
diff --git a/app/src/main/java/sudoku/SudokuFactory.java b/app/src/main/java/sudoku/SudokuFactory.java
index 4773b4f..644b9b2 100644
--- a/app/src/main/java/sudoku/SudokuFactory.java
+++ b/app/src/main/java/sudoku/SudokuFactory.java
@@ -5,38 +5,38 @@ import java.util.List;
 
 public class SudokuFactory {
 
-	private static List<Case> initCases(int size) {
-		List<Case> cases = new ArrayList<>(size * size);
+	private static List<Cell> initCells(int size) {
+		List<Cell> cells = new ArrayList<>(size * size);
 		for (int i = 0; i < size * size; i++) {
-			cases.add(new Case());
+			cells.add(new Cell());
 		}
-		return cases;
+		return cells;
 	}
 
-	private static List<Bloc> initRectangleBlocs(List<Case> cases, int width, int height) {
-		List<Bloc> blocs = new ArrayList<>();
+	private static List<Block> initRectangleBlocs(List<Cell> cells, int width, int height) {
+		List<Block> blocs = new ArrayList<>();
 		int size = width * height;
 		for (int i = 0; i < size; i++) {
-			Bloc newBloc = new Bloc();
-			int blocX = i % height;
-			int blocY = i / height;
+			Block newBlock = new Block();
+			int blockX = i % height;
+			int blockY = i / height;
 			for (int y = 0; y < height; y++) {
 				for (int x = 0; x < width; x++) {
-					int index = ((y + blocY * height) * size + (x + blocX * width));
-					Case caseBloc = cases.get(index);
-					caseBloc.setBloc(newBloc);
-					newBloc.addCase(caseBloc);
+					int index = ((y + blockY * height) * size + (x + blockX * width));
+					Cell blockCell = cells.get(index);
+					blockCell.setBlock(newBlock);
+					newBlock.addCell(blockCell);
 				}
 			}
-			blocs.add(newBloc);
+			blocs.add(newBlock);
 		}
 		return blocs;
 	}
 
 	public static MultiDoku createBasicEmptyRectangleSudoku(int width, int height) {
 		int symbolCount = width * height;
-		List<Case> cases = initCases(symbolCount);
-		List<Bloc> blocs = initRectangleBlocs(cases, width, height);
+		List<Cell> cases = initCells(symbolCount);
+		List<Block> blocs = initRectangleBlocs(cases, width, height);
 		Sudoku s = new Sudoku(cases, blocs);
 		List<Sudoku> ss = new ArrayList<>();
 		ss.add(s);
diff --git a/app/src/main/java/sudoku/constraint/BlockConstraint.java b/app/src/main/java/sudoku/constraint/BlockConstraint.java
index dc537e1..18be660 100644
--- a/app/src/main/java/sudoku/constraint/BlockConstraint.java
+++ b/app/src/main/java/sudoku/constraint/BlockConstraint.java
@@ -1,15 +1,15 @@
 package sudoku.constraint;
 
-import sudoku.Bloc;
-import sudoku.Case;
+import sudoku.Block;
+import sudoku.Cell;
 import sudoku.Sudoku;
 
 public class BlockConstraint implements IConstraint{
 
 	@Override
 	public boolean canBePlaced(final Sudoku s, int x, int y, int newSymbolIndex) {
-		Bloc bloc = s.getCase(x, y).getBloc();
-		return !bloc.getCases().contains(new Case(newSymbolIndex));
+		Block bloc = s.getCell(x, y).getBlock();
+		return !bloc.getCells().contains(new Cell(newSymbolIndex));
 	}
 
 }
diff --git a/app/src/main/java/sudoku/constraint/ColumnConstraint.java b/app/src/main/java/sudoku/constraint/ColumnConstraint.java
index ef71445..4c74ef2 100644
--- a/app/src/main/java/sudoku/constraint/ColumnConstraint.java
+++ b/app/src/main/java/sudoku/constraint/ColumnConstraint.java
@@ -7,7 +7,7 @@ public class ColumnConstraint implements IConstraint {
 	@Override
 	public boolean canBePlaced(final Sudoku s, int x, int y, int newSymbolIndex) {
 		for (int i = 0; i < s.getSize(); i++) {
-			if (s.getCase(x, newSymbolIndex).getSymboleIndex() == newSymbolIndex)
+			if (s.getCell(x, newSymbolIndex).getSymboleIndex() == newSymbolIndex)
 				return false;
 		}
 		return true;
diff --git a/app/src/main/java/sudoku/constraint/LineConstraint.java b/app/src/main/java/sudoku/constraint/LineConstraint.java
index f6836cd..8837229 100644
--- a/app/src/main/java/sudoku/constraint/LineConstraint.java
+++ b/app/src/main/java/sudoku/constraint/LineConstraint.java
@@ -7,7 +7,7 @@ public class LineConstraint implements IConstraint {
 	@Override
 	public boolean canBePlaced(final Sudoku s, int x, int y, int newSymbolIndex) {
 		for (int i = 0; i < s.getSize(); i++) {
-			if (s.getCase(newSymbolIndex, y).getSymboleIndex() == newSymbolIndex)
+			if (s.getCell(newSymbolIndex, y).getSymboleIndex() == newSymbolIndex)
 				return false;
 		}
 		return true;