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A two-mover whose leading variations show some intricate line play.
Solution: The key 1.Re7 threatens 2.Se6 mate. As the threat closes the
rook guard of e4 Black can anticipate this closure and defend by playing
knight or bishop to d3, closing the bishop guard of e4. 1...Sd3 opens
a queen guard on c5, which allows White to mate by 2.Sc6, closing the
original rook guard. In the matching variation 1...Bd3 opens a masked
rook guard on c3, allowing 2.Scb3 to close the original queen guard,
a neat reciprocal effect. Two by-play variations feature less complex line
opening and closing — 1...g5 2.Be5 and 1...g3 2.Qxe3.
There is also 1...Re5 2.Bxe5, and it is a slight pity that 1...Sxc2
simply repeats 2.Sc6. Aleksander Gulyaev (1908-1998), who also used
the pseudonym Grin, was an active composer for over 70 years.
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