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

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


a)
White Mates in 4. Korneev vs Valerij Filippov, Pavlodar, 1991
2qk1r2/Q3pr2/3p2pn/7p/5P2/4B2P/P1P3P1/1R4K1 w - - 0 1
[ Bb6+ Ke8 Qa4+ ]

b)
Korneev vs Wolfgang Hettler, Hamburg, 1993
rnb1kbnr/2p1pppp/pq6/1p6/3P1B2/2N5/PPP1NPPP/R2QKB1R w - - 0 1
[ Nd5 w/Nxc7 ]

c)
Korneev vs Masha Klinova, Oslo, 1994
8/1r1q2k1/3Pr1p1/1pR1pp1p/p1p1Q2P/P1P3P1/1P1R1P2/6K1 w - - 0 1
[ Qxb7 ]

d)
Black mates in 4.
Levan Pantsulaia vs Oleg Korneev, Hersonissos, 2017
2r1k3/p3np2/3P4/3p4/8/1Q1PKP2/PP2N1r1/R1B4q b - - 0 1
[ 1...Qh6+ 2.Kd4 Qf6+ 3.Ke3 Qe5+ ]



Oleg Korneev Puzzles, Part II.
The color disk on the diagram indicates who moves first.
a)
Black mates in 4.
Martin Nayhebaver vs Oleg Korneev, Lisbon, 2018
2Q5/5ppk/3p2q1/3Pp3/R3Pn2/1r3P1p/5P1P/5B1K b - - 0 1
[ 1...Qg2+ 2.Bxg2 fxg2+ 3.Kg1 Rb1+ ]

b)
White mates in 2.
Oleg Korneev vs Jorge Cruz, Maia, 2018
r2n2k1/1p2q1b1/2r3Q1/3pPpN1/p2P4/6P1/PP3PK1/3R3R w - - 1 0
[ Rh8+ ]

c)
White mates in 3.
Oleg Korneev vs Ilias Kakousatze, Stavanger, 2018
5rrn/p3qbR1/1p2p2k/2ppNp1p/3P1P2/2PBP3/PP4Q1/6RK w - - 1 0
[ Nxf7+ Rxf7 Qg6+ ]

d)
Black mates in 3.
Faddey Mochalin vs Oleg Korneev, Kazan, 2018
r7/1p5k/p1p3p1/2Q1p1q1/4n2p/1P2P2P/PB3rRK/6R1 b - - 0 1
[ ...Qg3+ Kh1 Qxh3+ ]

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