notyetagm: Black To Play: 25 ... ?
 click for larger viewMaroczy's previous move was the terrible blunder 25 xd1??. Why is this a blunder? Putting this minor piece on the back rank <INTERFERES> with the communication of the White c1-queen and e1-rook. The White c1-queen is now undefended and lined up with the Black c5-queen through the White c2-pawn. Therein lies the problem. The only White piece preventing Black from winning a whole queen with ... c5x c1 is the White c2-pawn, <BLOCKING> the c-file to cut-off the line of attack of the Black c5-queen at c2. But if that White c2-pawn <BLOCKS> the c-file, who defends the d3-square against the knight fork 25 ... d3! ? Nobody. With 25 ... d3! Black wins a whole exchange with a simple knight fork due to the pin down the c-file. <The defensive power of a pinned piece is merely illusory.> The White c2-pawn, <BLOCKING> the c-file to meet the threat of ... x , only -pretends- to <DEFEND> the d3-knight forking square. |