Here are some chess puzzles from the games of George Koltanowski. 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) White Mates in 5. Koltanowski vs Wilhelm Schoenmann, The Hague, 1928 2r2r2/ppqn1pkp/2n1p1p1/2p1P3/b1P1NPPB/P1PB3Q/7P/R4RK1 w - - 0 1 [ Bf6+ Nxf6 exf6+ Kh8 Qh6 Rg8 Ng5 Nd8 Qxh7# ]
b) White Mates in 6. Koltanowski vs Erling Tholfsen, The Hague, 1928 q6k/5r1n/p2R1P1Q/1p1pP3/2p4p/P7/1P4P1/1B5K w - - 0 1 [ e6 if Qf8 Rd8 ]
c) Koltanowski vs Vera Menchik, Paris, 1929 2rq1rk1/p1nn2pp/1p3p2/4PQ2/2pPN1P1/7P/PP1B2K1/2R2R2 w - - 0 1 [ Bb4 w/Nd6 ]
d) Koltanowski vs Conel H O'D Alexander, Hastings, 1935 r1bq2r1/pp3pbk/2p1p1pp/3nP3/1P1PN3/5N2/P2BQPPP/R2R2K1 w - - 0 1 [ Neg5+ ]
e) Koltanowski vs Pedro Cherta, Mollet, 1935 b2rqrk1/p1p2p2/1p2p2p/1P2P1p1/2P2n2/PR1BB3/4Q1PP/3R2K1 w - - 0 1 [ Bxf4 w/Qg4+ Qxf4 & Qxh6+ ]
f) Black to move and win. Oskam Gerard vs Koltanowski, Paris, 1924 r4rk1/1pqb1pp1/2p2b1p/p1n5/2P5/PP3B2/1BQ1NPPP/R3R1K1 b - - 0 1 [ ...Bxb2 Qxb2 Nd3 ]
g) Black Mates in 7. A Reynolds vs Koltanowski, Ostend, 1937 4r1k1/pb2qpp1/1p5p/2p1r3/3pP3/1P1P2P1/PBR2P1P/RQ2K3 b - - 0 1 [ ...Rxe4+ if Kf1 Qe6 f3 Qh3+ Kf2 Qxh2+ ]