Aronian-Karjakin reloaded

9/28/2012 – A spectacular variation from the first round of the Final Masters in São Paulo. White (to play) is a rook up, but Black threatens to demask his queen-bishop battery. Which evaluation holds true? A) White checkmates by force; B) there will be a perpetual check; C) Black's king escapes, whereupon the clearing of the long diagonal decides for him. ChessBase Magazine/October, larger diagram and solution.

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Aronian-Karjakin reloaded

A spectacular variation from the first round of the Final Masters in São Paulo. White (to play) is a rook up, but Black threatens to demask his queen-bishop battery. Which evaluation holds true?

A) White checkmates by force;
B) there will be a perpetual check;
C) Black's king escapes, whereupon the clearing of the long diagonal decides for him.

Solution