Here are some chess puzzles from the games of 1912.
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 3.
Gregory vs Kjell Krantz, Breslau, 1912
8/5p2/3Qbkr1/pp4N1/8/6P1/PPq2P1P/3R2K1 w - - 0 1
[ Qd4+ Kxg5 Qf4+ ]

b)
White mates in 5.
Karel Hromodka vs K Rausch, Vilnius, 1912
8/8/8/8/4K3/8/3Q1p2/6k1 w - - 0 1
[ Kf3 if f1/Q+ Kg3 ]

c)
White mates in 5.
Aaron Nimzowitsch vs Simon Alapin, Vilnius, 1912
r1b1k2r/1p2bppp/p1n2q2/8/8/5B2/PPPQ1P1P/2KRR3 w - - 0 1
[ Bxc6+ Bd7 Qxd7 Kf8 Qd8+ ]

d)
White mates in 5.
Karoly Sterk vs Frank J Marshall, Bad Pistyan, 1912
6k1/1pp1rpp1/1b4Pn/pP2p2Q/P1B5/r1PP4/6RP/4R2K w - - 0 1
[ Qxh6 if Re8 or gxh6 gxf7+ ]

e)
White mates in 6.
Richard Reti vs Oldrich Duras, Abbazia, 1912
r2qr1k1/pp1n2p1/5p2/2PpB2Q/3P4/2P2N2/P5PP/5RK1 w - - 0 1
[ Ng5 if Nf8 or fxg5 Qf7+ ]

1c)
mate in 5
Aaron Nimzowitsch vs Simon Alapin

1912 Puzzles, Part II.
White to move and win except where noted.
a)
White mates in 6.
Sergey Von Freiman vs Oldrich Duras, Abbazia, 1912
r1b1k3/pppp3p/2n3pB/4P3/2B1N3/2P3pn/P1P3KP/5R2 w - - 0 1
[ Nd6+ if cxd6 Rf8+ Ke7 Rf7+ Ke8 exd6 ]

b)
White mates in 7.
Edward Lasker vs George Thomas, London, 1912
rn3rk1/pbppq1pp/1p2pb2/4N2Q/3PN3/3B4/PPP2PPP/R3K2R w - - 0 1
[ Qxh7+ Kxh7 Nxf6+ Kh6 Neg4+ Kg5 h4+ Kf4 g3+ Kf3 0-0 ]

c)
White mates in 10.
Hartlaub vs Testa, Bremen, 1912
rn3rk1/pppq1ppp/3p4/4n3/2BQ4/8/PB3P1P/R5RK w - - 0 1
[ Rxg7+ Kh8 Rxh7+ Kxh7 Qh4+ Kg6 Rg1+ Kf5 Rg5+ Kf6 Rg4+ ]

d)
H Baudet vs Strick Van Linschote, The Hague, 1912
5r1k/R2n2pp/1pq5/3pP3/3P1p2/3P1Q2/6PP/6BK w - - 0 1
[ Qg4 if Rd8 e6 ]

e)
Richard Reti vs Rudolf Spielmann, Abbazia, 1912
r1bq2rk/ppp4p/1n4nQ/3P1p1N/2BP4/8/PPP3PP/4RRK1 w - - 0 1
[ d6 if Nxc4 Re7 Nxe7 Qf6+ or if Qf8 Re8 Qxe3 Nf6 ]

2b)
mate in 7
Edward Lasker vs George Thomas

1912 Puzzles, Part III.
White to move and win except where noted.
a)
Paul Leonhardt vs NN, Hamburg, 1912
r1bqk2r/pp1nbppp/2pp3n/4p1N1/P1BPP3/8/1PP2PPP/RNBQK2R w - - 0 1
[ Bxf7+ Nxf7 Ne6 if Qa5+ Bd2 Qb6 a5 Qxb2 Bc3 traps the Q ]

b)
Walter Von Holtzhausen vs Siegbert Tarrasch, Frankfurt, 1912
r1bqr1k1/pppnbppp/2np4/8/2BNP3/2N4P/PPP2PP1/R1BQR1K1 w - - 0 1
[ Bxf7+ if Kxf7 Ne6 Kxe6 Qd5+ mates ]

c)
Stephen Wood vs Oscar Muller, London CC Champ, 1912
r3q1r1/pp2nbpk/4p2p/2p1Pp1N/8/1P1PP1RQ/P1P3PP/2B2RK1 w - - 0 1
[ Rxg7+ if Rxg7 Nf6+ or if Kh8 Nf6 ]

3a)
Paul Leonhardt vs NN

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