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White takes the black bishop. Anything that doesn't put the bishop en prize is a waiting move.
As in 9. ... Bg5????
The 'waiting move' comment applies to the position after 9...Ba5 10. Nf7
If Black plays 9... Bg5? instead of 9... Ba5, then simply 10. Nc7 wins immediately.
I think the solution given in the diagram is wrong
After 1. c8=Bd6 2. a7?, Black can play 2... Bc5 3. Bxc5 g1=Q.
Now 4. Bxg1 is stalemate, while 4. Bb7+ Kxb7 5. Bxg1 Ka8 is the old "wrong rook's pawn" draw.
Instead, 2. Bb7+ Kb8 3. Bd5 (threatening a7+) wins.
I also wonder whether White could win (more slowly) with 1. c8=N?
I didn't say Bb6?, I said Nb6:
So black just plays 4. ... Bd8
Which leads back into the lines we discused 2 months ago.
White brings the king up; Black gets into zugzwang and loses. Please reread the earlier posts for details.
lol when I saw the title for a sec I thought it was really the Daily Puzzle!
On d8 the bishop runs out of squares and white has zugzwang after placing the king on b5. If Bg3 then Kf3 forces the bishop to a square where it can be forked by the Nb6
I don't see that line in 2/3-month old comments
almost drove me insane!
1. c8/N or 1. c8/B?
The play resembles the line following 11... Ba5 in comment #15.
Black can shuffle his king between a8 and b7 or his bishop between d8 and a5 but can't undertake anything else without losing quickly.
White just marches his king to d7 and (triangulating if necessary) sets up the winning zugwang.
@GSHAPIROY Please reread post #18. It explains White's winning plan.
You're posting lines where White plays random moves that don't follow the winning plan.
White's first objective is to get the knight to d5. 2...Bg3 doesn't do anything to oppose this, so White would just play 3. Ne7.
This is my last post in this thread.
Very well, I will discuss this with someone with a higher rating than yours.
1. How many moves will it take to win the g-pawn after winning the black bishop?
2. How many moves will it take to mate with bishop/knight after the g-pawn and bishop are captured?