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Here are some chess puzzles from the games of John Grefe.
The color disk on the diagram indicates who moves first.

Solutions are between the brackets under each puzzle.
Drag your mouse from one bracket to the other.

a)
John Grefe vs Norman Weinstein, USA Championship, 1974
5rk1/2r4p/1p1p1qp1/p1nP1P2/8/1P4RP/3Q2PK/1B3R2 w - - 0 1
[ fxg6 if Qxf1 gxh7+ Kf7 Qh6 ]

b)
Andrew Karklins vs John Grefe, Houston, 1974
8/p3qp1k/2p1n1pp/P3p3/2B1P2P/2P1QPP1/1r1R3K/8 b - - 0 1
[ ...Qc5 ]

c)
John Grefe vs Pal Benko, Oberlin Ch - USA, 1975
1r1rbbk1/2q2p2/2npp1p1/1p3PPp/4P2Q/1nN1BB1R/1PP4P/R6K w - - 0 1
[ f6 w/Bxh5 ]

d)
White mates in 6.
John Grefe vs Arnold Denker, Lone Pine, 1979
2b1kr2/p4p1Q/p1p1pR2/2Ppq3/7N/8/PrP3PP/5RK1 w - - 0 1
[ Rxf7 ]

e)
White mates in 6.
John Grefe vs Lubomir Ftacnik, San Francisco, 1991
8/1nr2q1k/p1Q1R1R1/5p1p/2p2P2/6P1/P6P/7K w - - 0 1
[ Rh6+ Kg8 Reg6+ Qxg6 Qxg6+ ]

More US GMs
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