LEA2/CheckersSpielBot/BoardHelper.cs

namespace CheckersSpielBot
{
    public static class BoardHelper
    {
        public static bool IsPlayableSquare(int row, int col) => (row + col) % 2 == 1;
        public static bool IsWithinBounds(int row, int col) => (uint)row < 8 && (uint)col < 8;

        public static bool BelongsToPlayer(int piece, int player) =>
            player == 1 ? piece == 1 || piece == 3
                        : piece == 2 || piece == 4;

        public static bool IsOpponentPiece(int own, int target)
        {
            if (target == 0) return false;
            bool ownRed = own == 1 || own == 3;
            bool targetRed = target == 1 || target == 3;
            return ownRed != targetRed;
        }

        public static bool IsKing(int piece) => piece == 3 || piece == 4;
        public static bool IsRedPiece(int piece) => piece == 1 || piece == 3;
        public static string PlayerLabel(int player) => player == 1 ? "Red" : "Blue";
    }
}