13 Aug 07
Originally posted by giantsfan94707Qf6? Rb8 and the white queen has to go back to either f4 or f2. After Qf2 black plays Bf5! locking the white queen out of f6, threatening Rb2 which wins instantly, so white has to play Bb3, after which Qh1! should seal the win for black.
qf6
So, 1. Qf6? Rb8 2. Qf2 Bf5! 3. Bb3 Qh1! -+
Qf4 is better because Bf5 is now met by e6! However, black can create a zugzwang position with Qc3!, threatening Bxc4. White has two replies: Bf3 and Bb3.
A) Bf3 Qa1! Bd1 Qc1 and we have the same position, but then with white to move! Any rook move loses the bishop, any bishop move allows the black queen to come in to g1/h1, Kh2/g2/f2 allows Rb2 and after Kf3 Bf5 is suddenly possible, because e6 Rf8! leads to a black win. So the only good move for white is Qf2, but that transposes to the line above with 2. Qf2 !
B) Bb3 Bf5! is good now, because after e6 Rf8 exf7+ Rxf7 white can't quickly transfer his bishop to d5. So black can simply pick off the d3-pawn on his next move and have a won game.
No, Qf6? is not the right first move.
13 Aug 07
Hold on, let me clarify the situation a bit. A rook move is obviously no good because it loses material. A bishop move allows black to play his queen to g1 or h1. A king move either blocks the half-open f-file or moves onto the 2nd row, after which Rb2 is lethal.
Any other candidate moves besides Qf6?
13 Aug 07
Intuitively thinking - there is a stalemate somewhere. A sacrifice of the queen, rook and bishop ending up with the black queen at f1 gets us there. But I don't know how.
Perhaps starting the combination with Qxf7+, followed by Rf2+ but how to force the black queen to f1 I don't know...
13 Aug 07
Originally posted by FabianFnash pawn can move
Intuitively thinking - there is a stalemate somewhere. A sacrifice of the queen, rook and bishop ending up with the black queen at f1 gets us there. But I don't know how.
Perhaps starting the combination with Qxf7+, followed by Rf2+ but how to force the black queen to f1 I don't know...