Karel Traxler (1866, Vlachovo Březí – 1936, Volyně) was a Czech chess master and composer of chess problems.
He is best known for the hyper-aggressive variation named after him, the Traxler Variation in the Two Knights Defense, which was first shown in the following game against Reinisch, played in Hostouň[disambiguation needed] in 1890:
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5!? 5.Nxf7?! (modern theory suggests that 5.Bxf7+! is better) Bxf2+! 6.Ke2 (Traxler recommends 6.Kf1! Qe7 7.Nxh8 d5 8.exd5 Nd4, where Black has a strong attack but White may nonetheless hold) 6...Nd4+ 7.Kd3? b5! 8.Bb3 Nxe4!! 9.Nxd8 Nc5+ 10.Kc3 Ne2+! 11.Qxe2 Bd4+ 12.Kb4 a5+ 13.Kxb5 Ba6+ 14.Kxa5 Bd3+ 15.Kb4 Na6+ 16.Ka4 Nb4+ 17.Kxb4 c5#
Here is his victory over Oldřich Duras in Veselí nad Lužnicí in 1902:
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Bd2 Bxd2+ 8.Nbxd2 Nxe4 9.d5 Nxd2 10.Qxd2 Nb8 11.d6 O-O 12.Rc1 Nc6 13.dxc7 Qxc7 14.O-O Qa5 15.Qd6 Qb4 16.Bxf7 Rxf7 17.Rxc6 Qxb2 18.Re1 Qf6 19.Qd5 1-0
Because Traxler was a Roman-Catholic priest, he rarely played chess in serious competitions. As a chess composer he pursued the style of Bohemian school.