looks to me like Rg7+ is ok. If the king goes to the edge of the board, white takes the bishop, allows queening, plays the rook to g3 and has a fortress. If Kf5 then Nd4+ Bxd4 (else Nxe2) Re7 Be5 Rxe5 Kxe5 f4+ any Kf2 stopping the pawn
Agree, 1.h3+! holds the position for white. While I first thought Anon @ 10:25 had a point, too, it dawned on me that the final position depicted here is not a fortress as Qd1 will put white in zugzwang, forcing the rook to leave g3. Black should be able to win although of course it is still tought work ahead. So my vote goes to 1.h3+ as well… Beelze
looks to me like Rg7+ is ok. If the king goes to the edge of the board, white takes the bishop, allows queening, plays the rook to g3 and has a fortress. If Kf5 then
Nd4+ Bxd4 (else Nxe2)
Re7 Be5
Rxe5 Kxe5
f4+ any
Kf2 stopping the pawn
what a very cool puzzle! h3+ seems to do the trick.
if 1 .. Kh4
2 Rd4+ Bxd4
3 Nxd4 e1Q+
4 Kg2 and black must try and prevent Nf3 checkmate!
if 1 .. Kf5
2 Nd4+ Bxd4
3. Re7 to win the pawn +-
Click here for an interesting position.
Agree, 1.h3+! holds the position for white. While I first thought Anon @ 10:25 had a point, too, it dawned on me that the final position depicted here is not a fortress as Qd1 will put white in zugzwang, forcing the rook to leave g3. Black should be able to win although of course it is still tought work ahead. So my vote goes to 1.h3+ as well…
Beelze
adding to Anon 11:01’s comments:
1 .. Kf5
2 Nd4+ Bxd4
3. Re7 Be5
4. RxB KxB
5. f4+! Kxf4
6. Kf2.
This explains why the a-pawn is in the puzzle. It’s needed now to win.