Chess Board
[ECO code C33]
(KGA:) Bryan C.G. - "Immortal Game" Var.
White's KB1(f1) king moved to K2(e2).
19..QxR (shown left): If Black's Queen on QR8(a1) removes the White rook on KKt8(g1) (as diagram) then White wins by capturing Black's KKtP with check, forcing 20..K-Q1 for White's bishop to mate on QB7(c7). B-Alt.
     White  Black	Continuation:
 18. B-Q6!! QxR ch  20.	KtxP ch K-Q1 fcd
 19. K-K2   QxR	    21.	B-B7 mate
Example ends: Undo or Jump or Clear