1. White to play.
 
    
  2. White to play.
 
    
  3. Black to play.
 
    
  4. Black to play.
 
    
  5. White to play.
 
    
  6. Black to play.
 
    
  Answer: 1. Checkmate 2. Stalemate 3. Bxc8 4. ... a5 5. Stalemate 6. ... d5
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