A coffin nail...

12/11/2009 – ... in chess is a pawn which has advanced to the sixth rank in the enemy king position, creating all kinds of mate motifs. Here Black had to decide whether he could allow White's pawn to go to h6 or not. 37...Ra4xe4 in your opinion leads to which result? A) win for Black; B) positional draw; C) win for White. The solution is here, but first ponder over it with a larger version of the diagram.

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