29 Mar '05 03:35>
Originally posted by BigDoggProblemWow. Pretty clever.
You are correct that black must be deprived of the right to castle, but incorrect about [b]why black cannot castle.
White could have played Nxf8 in the past. We can't prove that Black recaptured, so this won't help us prove Black can't castle.
However, white plays 1.0-0-0! and it's a different story. The rook on d4 could not come from h1 ...[text shortened]... castle.
So, as others have pointed out, white's 1.0-0-0! destroys black's right to castle.[/b]