public IEnumerable <int> MovesFrom(IPosition state, int from)
{
switch (state.ColumnHeightAt(from))
{
case 1:
return(GetPawnMoves(state, from));
case 2:
return(GetRookMoves(state, from));
case 3:
return(GetKnightMoves(state, from));
case 4:
return(GetBishopMoves(state, from));
case 5:
return(GetQueenMoves(state, from));
default:
throw new InvalidOperationException(string.Format("Invalid height value: {0}", state.ColumnHeightAt(from)));
}
}