White Mates in 6 – Problem 12

White blunders twice; however, Black blunders back allowing White to “steal” the game with mate in 6. White could mate in 3 and mate in 4, or mate in 5, with Black’s similar cooperation.

DIAGRAM CCKM-P12

 a   b   c   d   e   f   g   h 
 8   8 
 7   7 
 6   6 
 5   5 
 4   4 
 3   3 
 2   2 
 1   1 
 a   b   c   d   e   f   g   h 

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1.Qxc6+?? bxc6 2.Rb8+ Kd7 3.Rb7+?? Kc8??
4.Rc7+ Kb8 5.Nxc6+ Ka8 6.Ra7#  
1-0 Bures – Zikan, USSR, 1969