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This has got to be the coolest chess puzzle I have ever seen. Shamelessly stolen from here (Which is actually linked from the help center, which is how I found this) which links here. I don't believe anybody has posted this before as a puzzle though.

The question: Can white win in this position?

Chess position

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  • $\begingroup$ No, because black king would always be able to move to the white square? Proly you can do stalemate, but not win. $\endgroup$ – Jan Ivan Jun 7 '17 at 10:40
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    $\begingroup$ @JanIvan Without pawn, true. But... :) $\endgroup$ – Zizy Archer Jun 7 '17 at 10:43
  • $\begingroup$ @ZizyArcher Depends on where Black pawn ends. If there, there is only one way with enemy bishop moving to A2. If Black pawn has to end here - you wait till black pawn is on A3, then you move bishop from A1/H8 line, and next move after you see King A1+pawn A2, you move it back to A1/H8 line. $\endgroup$ – Jan Ivan Jun 7 '17 at 10:53
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Try to solve this before reading below! (No, really!)

The answer is

Yes

Because

  1. B4f6  a6
  2. Ba1   a5
  3. Bdg5  a4
  4. Bgf6  a3
  5. Kc3   Kxa1   (or: 5. ...Kb1  6. Kb3 a2  7. Kc3 Kxa1  8. Kc2#) 
  6. Kb3+  Kb1
  7. Ba1   a2
  8. Kc3   Kxa1
  9. Kc2#
all Black's moves (other than 5) forced.
Thanks to Gareth for an enlightening comment in The Sphinx's Lair.

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  • $\begingroup$ Why is Black's move 5 forced? $\endgroup$ – Gareth McCaughan Jun 7 '17 at 11:04
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    $\begingroup$ Not very cute when you had it solved one hour before it was posted… $\endgroup$ – Jan Ivan Jun 7 '17 at 12:07
  • $\begingroup$ @JanIvan I don't know what you mean. I didn't have an answer until just a few minutes before I posted mine. $\endgroup$ – Rubio Jun 7 '17 at 12:15
  • $\begingroup$ Nice :) How did you solve it so fast though? $\endgroup$ – Wen1now Jun 8 '17 at 6:00

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