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1. Bd5
a) 1. … Bd5
2. cd Ke8 (preventing f7)
3. d6
b) 1. … Kd7
2. … f7
I think I would want to take control of f7. Let’s see if this gets us anywhere profitable:
1. Bd5
And, here, black can either exchange at d5, protect the bishop with Kd7, or move the bishop to one of the other squares on the c8/h3 diagonal, but all of these just look losing at even a cursory glance:
1. …..Bd5
2. cd5
And f7 is coming, so black must play
2. …..Ke8
3. d6 and there is nothing black can do- the knight has no moves, on a pawn move, white can just play d7 followed by f7 and the black king is cut off from the e8 square by the pawn-bishop combo, or if black plays Kf7, d7 gives another unstoppable white pawn. Or, at move 1, black can try
1. …..Kd7
2. f7! and the pawn can’t be stopped. And, finally,
1. …..Bf5 (or Bg4, Bd7 etc.)
2. f7 and the pawn can’t be stopped.
1.Bd5!
I)1….Kd7 2.f7! +-
II) 1….Bd7/Bg4/Bh3/Bf5 2.f7! +-
III) 1….Bxd5 2.cxd5
White threatens 3.f7! in which case the threat of 4.f8/Q cannot be repelled
2…Ke8 3.d6! Black king can’t move and either can his knight, not to speak of the a pawn ! 3…e4 4.f7+ or 4.d7+! Kx 5.d7 or 5.f7 depending on the fourth move
1.Bd5…Bxd5 if …Kd7 2.f7 wins
2.cxd5..Ke8 otherwise 3.f7 wins
3.d6 wins
1.Bd5 Bxd5 2.cxd5 Kd7 3.f7 Nd6 4.Bxd6 Kxd6 5.f8=Q #Black resign because not enough material to fight
Bd5 looks simple enough; black has to either protect the bishop with Kd7, and then f7 forces black to give up the bishop for the f-pawn; or Bxd5, cxd5; Ke8. d6 followed by d7 and the king can’t stop both pawns.
Black must control f7, so
1. Bd5 BxB
2. cxd Ke8
3. d6 (a) Kf7
4. d7 1-0
(b) Kd7
4. f7 1-0
(c) Nxd6
4. BxN 1-0
Am I missing something?
Mark