Perhaps Bc8, winning a Bishop, due to threat of checkmate. (2. Qxh7, RxQh7, 3. RxRh7 mate, if the black Queen has moved off the 7th rank. (Seems too simple to be true, or maybe there’s more than the Bishop to be won?!) Mark
Qxh7 is of course not a mate in 2 as previously suggested. However, the black queen and rook on g7 must not leave the 7th rank. The consequence is that Bc8 wins a bishop.
Bc8 with the idea of
… Qxc8
Qxh7+ Rxh7
Rxh7 mate
Perhaps Bc8, winning a Bishop, due to threat of checkmate. (2. Qxh7, RxQh7, 3. RxRh7 mate, if the black Queen has moved off the 7th rank. (Seems too simple to be true, or maybe there’s more than the Bishop to be won?!) Mark
bc8
Bc8 wins a B.
Bc8. If QxB black is mated.
Any other move white wins the bishop on a6
1. Bxg8 Kxg8
2. Bh6
Bc8 in less than a minute
1. Qxh7+ mate in 2
Bc7, threatening the bishop on a6.
if Qxc7, Qxh7 mate to follow.
Winning move is Bc8.
I think:
1. Bc8 Qc7 (or Qe7 or Qf7)
the black queen has to stay on the 7th rank
to prevent mate on h7 then,
2. Bxa6 wins.
Qxh7 is of course not a mate in 2 as previously suggested. However, the black queen and rook on g7 must not leave the 7th rank. The consequence is that Bc8 wins a bishop.
Ok, I was too quick myself. Just noticed that Bc8 doesn’t work because of Nf6.
1. Bc8 Nf6
2. Bxb7 Nxh5
3. Rxh5 Bxb7
4. Bh6
1. Q:h7+ R:h7 2. R:h7+ Q:h7+ doesn’t work. If we could only get the black Queen off the 7th rank.
1. Bc6! wins a piece since the Q must not capture, after 1…Qc7 or 1…Qe7 2. B:a6 and wins easily, as the b- and c-pawns will fall soon.
Actually Bc8! wins a piece and the game.
Bc8 should win the a6 bishop
Another possibility is f4 trying to open the a1-h8 diagonal for the white bishop
1.a4!! if 1..bxa4 2.b5!Ba5 3.bxa6!
or 1…h6 2.axb5 Bxb5 3.Nxb5 Qxb5 4.Qxh6! and there are many other little variations.