uqac-ia-sudoku-csp/uqac-ia-sudoku-csp/Solver/Constraints/ColumnConstraint.cs

using uqac_ia_sudoku_csp.Interfaces;

namespace uqac_ia_sudoku_csp.Solver.Constraints
{
    public class ColumnConstraint : IConstraint
    {
        public bool Check(Board board, int x, int y)
        {
            var cell = board.GetNumber(x, y).Value;
            for (var yy = 0; yy < board.Size; ++yy)
            {
                if (cell == board.GetNumber(x, yy) && yy != y)
                {
                    return false;
                }
            }
            return true;
        }
    }
}