Here are some chess puzzles from games of the 2012 National Open.
The color disk on the diagram indicates who moves first.

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

a)
Anjelina Belakovskaia vs Rudy Vrana, Las Vegas, 2012
1rb1nrk1/3n1qb1/3pp2p/p2N1p2/1p3P1N/1P1P2P1/PB1Q2BP/R4RK1 w - - 0 1
[ Ng6 if exd5 Bxd5 ]

b)
Raymond Kaufman vs Kazim Gulamali, Las Vegas, 2012
r1n4r/1p1kppb1/p5pp/P1pPp3/R4P1B/2N5/1qP1Q1PP/5RK1 w - - 0 1
[ Rb1 if Qxc3 Be1 ]

c)
Tamaz Gelashvili vs Varun Krishnan, Las Vegas, 2012
1r3rk1/1p3pp1/p7/P3pR2/2B1P3/1P1Pp1b1/2P5/5K1R w - - 0 1
[ Rfh5 if g6 Rg5 ]

d)
Mihaela-Veronica Foisor vs Simone Liao, Las Vegas, 2012
5n1Q/5kp1/p3pr1p/8/1p1p4/1P2PB2/P2q2PP/2R3K1 w - - 0 1
[ Bh5+ if Ke7 Qxg7+ or if g6 Rc7+ Ke8 Qxf6 ]

2012 National Open Puzzles, Part II. The color disk on the diagram indicates who moves first.
a)
White Mates in 4. Peter Graves vs Matt Anzis, Las Vegas, 2012
5r2/4RNkp/1q1P2p1/3Q4/1p5b/7P/6P1/7K w - - 0 1
[ Ng5+ ]

b)
Dharim Bacus vs Andre Diamant, Las Vegas, 2012
r2qkb1r/1b3ppp/p1n1p3/2ppP3/Pp3Pn1/3P1N1P/1PPNQ1P1/R1B1KB1R b KQkq - 0 1
[ ...Nd4 if Nxd4 Qh4+ Kd1 Nf2+ ]

c)
Black Mates in 5. Andre Diamant vs Mikheil Kekelidze, Las Vegas, 2012
3r2k1/5p1p/p5r1/2N4q/1P2p3/P6P/6P1/1Q2R1K1 b - - 0 1
[ ...Rxg2+ if Kxg2 Rd2+ ]

d)
Joshua Gutman vs Mihaela-Veronica Foisor, Las Vegas, 2012
2r5/p1q2pk1/3Rp1p1/1Q2P1p1/3P4/7P/P4PP1/6K1 b - - 0 1
[ ...Qc1+ if Qf1 Qd2 ]


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