Queens' quartet

by ChessBase
10/27/2011 – Both sides are about to promote their pawns. How is the position after 53...e1Q 54.a8Q to be assessed? Black ...  A) ... regains the white plus piece, with equality; B) ... wins by force through checkmate or queen capture; C) ... must give perpetual check. The solution is here, but first ponder over it with a larger version of the diagram.

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Queens' quartet

 Both sides are about to promote their pawns. How is the position after 53...e1Q 54.a8Q to be assessed? Black ... 

A) ... regains the white plus piece, with equality;
B) ... wins by force through checkmate or queen capture;
C) ... must give perpetual check.

Solution

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