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Here are some chess puzzles from the games of Alexander Onischuk.
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)
Alexander Onischuk vs Vladimir Malaniuk, Nikolaev, 1995
2r1qrk1/1p1nn3/p2p3p/2pP1p2/2P1pP1N/6N1/PPQ3PP/4RRK1 w - - 0 1
[ Nxe4 fxe4 Qxe4 Rf7 Ng6 ]

b)
White mates in 3.
Alexander Onischuk vs Chong Liang, Beijing, 1998
2r2k2/5p1p/p4P2/2P4p/2b5/6Q1/6PK/8 w - - 0 1
[ c6 ]

c)
Alexander Onischuk vs Dimitrij Bunzmann, Polanica Zdroj, 1999
5rk1/1b1p1p2/1qn1pp1p/8/rP6/1N2P3/4BPPP/1R1Q1RK1 w - - 0 1
[ Nc5 Rxb4 Nxd7 ]

d)
White mates in 6.
Alexander Onischuk vs Bruce Leverett, Philadelphia, 2004
3r3k/1r4p1/1p1P1nQ1/p1p1R3/P4P1p/6Pq/1P2B2P/3R2K1 w - - 0 1
[ Rh5+ Nxh5 Qxh5+ Kg8 Bc4+ ]

Alexander Onischuk Puzzles, Part II.
The color disk on the diagram indicates who moves first.
a)
White mates in 6.
Alexander Onischuk vs Dmitry Gurevich, San Diego, 2004
r5r1/2R1Qpkp/b3pp2/7q/1p1R4/1P2PN2/5PPP/6K1 w - - 0 1
[ Rg4+ Kh6 Qxf6+ Rg6 Qxf7 Rh8 Rxg6+ ]

b)
Alexander Onischuk vs Inna Gaponenko, Caleta, 2011
1rb1qrk1/p4pp1/1n3P1p/1n1pP3/NppP1B2/8/P3B1PP/1R1Q1RK1 w - - 0 1
[ fxg7 Kxg7 Bxh6+ Kxh6 Qd2+ Kh7 Rf6 Bf5 Qh6+ Kg8 Rxf5 mates ]

c)
White mates in 3.
Alexander Onischuk vs Baris Esen, Istanbul, 2012
1rk2q2/5pp1/1pP2n1p/p1p1Q3/P1P5/5B1P/5PP1/3R2K1 w - - 1 0
[ Bg4+ if Nxg4 Qf5+ or if Nd7 Bxd7+ ]

d)
Alexander Onischuk vs Cristian Camilo Rios, Tromsoe, 2014
r1r3k1/5ppp/4pn2/p1q5/2Q5/P1B1P3/5PPP/1R1R2K1 w - - 1 0
[ Rd8+ ]

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