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Here are some chess puzzles from the games of Boris Kostic.
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)
White mates in 4.
Boris Kostic vs D Donaldson, USA, 1915
rnb3k1/pp2q1Pp/1bppP2P/3B4/3PN1r1/8/PPP5/2KR3R w - - 1 0
[ Nf6+ Qxf6 e7+ cxd5 e8/Q+ ]

b)
Albert Hodges vs Boris Kostic, New York, 1916
5r1k/p1p3pp/3b4/8/5N1Q/1P6/P1q3PP/4R2K b - - 0 1
[ ...g5 if Qxg5 Bxf4 ]

c)
White mates in 2.
Boris Kostic vs Andre Louis, Weston, 1922
6R1/5P1k/1r5q/2r5/8/6Q1/5P2/5RK1 w - - 1 0
[ Rh8+ ]

d)
Boris Kostic vs Ladislav Prokes, Bardejov, 1926
1r1rq1k1/ppQb2bp/6p1/N2Rpp2/3p4/3P2P1/PP2PPBP/5RK1 w - - 1 0
[ Nxb7 ]

e)
Henri Weenink vs Boris Kostic, London, 1927
7k/pppb2pp/2np3q/1B2p3/8/1QPP1P2/P1P4P/4R1K1 b - - 0 1
[ ...Qd2 if Rf1 Bh3 or if Qf7 Qxe1+ Kg2 Qd2+ ]

1a)
mate in 4
Boris Kostic vs D Donaldson

Boris Kostic puzzles, pt. ii.
The color disk on the diagram indicates who moves first.
a)
Jakob Seitz vs Boris Kostic, Nice, 1930
r1br3k/ppp4n/3p1bp1/2PB1p2/4p3/1PN3P1/PB2PP1P/R4RK1 b - - 0 1
[ ...c6 if Bf7 Kg7 Bc4 d5 ]

b)
White mates in 2.
Boris Kostic vs Paul Keres, Stockholm, 1937
r1bq3r/ppp1b1kp/2n3p1/3B3Q/3p4/8/PPP2PPP/RNB2RK1 w - - 0 1
[ Bh6+ ]

c)
White mates in 4.
Boris Kostic vs O Nedeljkovic, Ljubljana, 1938
1r3r1n/6R1/R6N/1p2p2k/8/6P1/2P2P2/6K1 w - - 1 0
[ g4+ Kh4 Nf5+ Rxf5 Rh6+ ]

d)
Black mates in 2.
Lajos Steiner vs Boris Kostic, Berlin, 1928
5rk1/R3Qpb1/1p6/1r5p/6P1/PP4P1/2Pq3P/1K2R3 b - - 0 1
[ ...Rxb3+ ]

e)
White mates in 6.
Boris Kostic vs Savielly Tartakower, Bled, 1950
1k4rr/p1p3p1/2p1qp1p/3pPN2/Q2P4/8/P2B2PP/5RK1 w - - 0 1
[ Nd6 if cxd6 Rb1+ Kc8 Qxa7 ]

f)
Black mates in 2.
Miguel Najdorf vs Boris Kostic, Dubrovnik, 1950
1k2r3/ppp2p1b/2n2q1p/6p1/Q1P3P1/PN1rP1BP/1P6/2KRR3 b - - 0 1
[ ...Rc3+ ]

2a)
Jakob Seitz vs Boris Kostic

Other GMs from Serbia & Montenegro
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