28 Mar '05 08:46>
Originally posted by THUDandBLUNDERHmmm......Clearly the only way white can mate in two is Rad1.....Rd8++. However this only succeeds if it can be proven that black is unable to castle.
White to play and mate in 2 moves.
We can see that blacks f-file bishop is off the board and given that the e and g pawns have not been moved it would follow that it had to be captured. But by what? This is pivital and the missing black h file pawn now becomes significant.
Obviously the capture was not with the white bishop as there is no path and it cannot have been the Knight as this would not have forced the recapture. Since both white rooks are still in play the conclusion is that the Queen captured the bishop with check forcing the recapture either by the King or rook and thereby removing the option of castling. I think thats got it.