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Back-rank mate in 2 on b1 (f5)

li-069i5
Puzzle rating: 758Theme: Back rank: the king is trapped behind its own pawns — use that.
h1g2f3e4d5c6b7a8
Black to move — find the best continuation

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The tactical motive

Back rank: the king is trapped behind its own pawns — use that.

Black to move — find the best continuation

Solution & explanation

Main line

38... Qxb1+ 39. Qd1 Qxd1#

Why it works

  • Great move! queen to b1 keeps the pressure (#1).
  • Well found: queen to d1 (#).
  • The line ends in a forced mate in 2.
  • If instead Qd1, then Qxd1# and it is mate.

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