Here are some chess puzzles from the games of Alexander Onischuk.
White to move and win except where noted.

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


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

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

e)
White Mates in 6.
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+ ]



Alexander Onischuk Puzzles, Part II.
The color disk on the diagram indicates who moves first.
a)
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+ ]

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

c)
Vladimir Onischuk vs Aleksej Aleksandrov, Alma-Ata, 2016
2k1rb2/2p3p1/1pq2pQp/1R1r4/8/3PB2P/2P2PP1/1R4K1 w - - 1 0
[ Rxd5 ]

d)
Black mates in 4.
Gabriel Flom vs Vladimir Onischuk, Bastia, 2017
5kr1/1pp1q1b1/3P3p/2p2b1B/p3pP2/P7/1r5P/2QR1RNK b - - 0 1
[ 1...Rxh2+ 2.Kxh2 Qh4+ 3.Kg2 Bd4+ ]

e)
White mates in 5.
Vladimir Onischuk vs Vahe Baghdasaryan, Batumi, 2018
6kr/4Bpb1/1p1p4/3B1P2/4R1Q1/2qn2P1/2P2P2/6K1 w - - 1 0
[ 1.Bxf7+ Kxf7 2.Qg6+ Kg8 3.Qe6+ ]

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