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

a)

Grefe vs Richard Lobo, San Francisco No-CA Championship, 1997
[ Qd5+ if Rf7 Rxd7 ]

b)

Grefe vs Walter Browne, USA Championship, 1973
[ Nxd6+ if Kxe7 Rf7+ ]

c)

Grefe vs Pal Benko, Oberlin Ch - USA, 1975
[ f6 w/Bxh5 ]

d)

Grefe vs Norman Weinstein, USA Championship, 1974
[ fxg6 if Qxf1 gxh7+ Kf7 Qh6 ]

e)

Grefe vs Miguel Najdorf, Lone Pine, 1976
r1bnrb1k/pp5p/2p3pN/4P3/5Q2/4B2P/BPP3PK/8 w - - 0 1
[ Nf7+ ]

f)

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

g)

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

h)

Black to move and win. Andrew Karklins vs Grefe, Houston, 1974
8/p3qp1k/2p1n1pp/P3p3/2B1P2P/2P1QPP1/1r1R3K/8 b - - 0 1
[ ...Qc5 ]

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