Fixes #14

app/src/main/java/sudoku/structure/SudokuFactory.java

@@ -291,4 +291,28 @@ public class SudokuFactory {
 			return null;
 		}
 	}
+
+	public static MultiDoku createBasicEmptyRandomBlockDoku(int blockSize, List<Constraint> constraints) {
+		int blockCellCount = blockSize * blockSize;
+		List<Cell> cells = initCells(blockCellCount);
+		List<Cell> homeLessCells = new ArrayList<>();
+		homeLessCells.addAll(cells);
+		List<Block> blocks = new ArrayList<>();
+		Random r = new Random();
+		for (int i = 0 ; i < blockCellCount; i++) {
+			Block b = new Block();
+			for (int j = 0; j < blockCellCount; j++) {
+				int cellIndex = r.nextInt(homeLessCells.size());
+				Cell cell = homeLessCells.remove(cellIndex);
+				b.addCell(cell);
+				cell.setBlock(b);
+			}
+			blocks.add(b);
+		}
+		Sudoku sudoku = new Sudoku(cells, blocks, constraints);
+		for (Block block : blocks) {
+			block.getSudokus().add(sudoku);
+		}
+		return new MultiDoku(Arrays.asList(sudoku));
+	}
 }