Here are some chess puzzles from the games of Borislav Kostic. 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) Black to move and win. Albert Hodges vs Kostic, New York, 1916 5r1k/p1p3pp/3b4/8/5N1Q/1P6/P1q3PP/4R2K b - - 0 1 [ ...g5 ]
b) Black to move and win. Henri Weenink vs Kostic, London, 1927 7k/pppb2pp/2np3q/1B2p3/8/1QPP1P2/P1P4P/4R1K1 b - - 0 1 [ ...Qd2 w/...Bh3 if Qf7 Qxe1+ & Qd2+ ]
c) Black to move and win. Jakob Seitz vs Kostic, Nice, 1930 r1br3k/ppp4n/3p1bp1/2PB1p2/4p3/1PN3P1/PB2PP1P/R4RK1 b - - 0 1 [ ...c6 w/...d5 ]
d) Kostic vs Leon Kremer, Munich, 1936 3qk2r/R2b1p1p/3P1b1Q/3P4/7p/3P2P1/P1P1KP2/7B w - - 0 1 Black's king has moved. [ Ra8 ]
e) White Mates in 2. Kostic vs Paul Keres, Stockholm, 1937 r1bq3r/ppp1b1kp/2n3p1/3B3Q/3p4/8/PPP2PPP/RNB2RK1 w - - 0 1 [ Bh6+ ]
f) White Mates in 5. Kostic vs Savielly Tartakower, Bled, 1950 1k4rr/p1p3p1/2p1qp1p/3pPN2/Q2P4/8/P2B2PP/5RK1 w - - 0 1 [ Nd6 if cxd6 Rb1+ Kc8 Qxa7 ]