Method discoveredCheck

src/main/java/game/Board.java:804–816

(Piece king, Cell coordinate)

    }

    private boolean discoveredCheck(Piece king, Cell coordinate) {
        //knight and pawn can't give discoveries
        final Line line = new Line(coordinate, king.position);
        if (line.isStraight) {
            for (int row = king.position.row + line.rowDiff, col = king.position.col + line.colDiff; Utils.withinBoardLimits(row, col); row = row + line.rowDiff, col = col + line.colDiff) {
                if (!isEmpty(row, col)) {
                    final Piece piece = pieces.get(Cell.get(row, col));
                    return piece.color != king.color && (piece.sameType(PieceType.QUEEN) || piece.sameType(line.minorPieceType));
                }
            }
        }
        return false;
    }

    @Override
    public String toString() {