An earlier version of this chess column carried an incomplete solution to today's three mover by S. Loyd. The solution below is complete.
The world junior championship is one of the most unpredictable competitions in chess. It began in 1951, and some of its previous winners, including Boris Spassky, Anatoly Karpov, Garry Kasparov and Vishy Anand, went on to become world champions. But many junior titleholders are long forgotten, and some don't even play chess anymore.
Last year's junior champion, Zaven Andriasian of Armenia, became famous last week for the wrong reason: He lost all six games at the Essent grandmaster double round-robin in the Dutch town of Hoogeveen. The tournament winner, Shakhriyar Mamedyarov of Azerbaijan, scored 4 1/2 points. He is the only player to win the world junior title twice, in 2003 and 2005.
On Tuesday in Yerevan, Armenia, Egyptian grandmaster Ahmed Adly became one of the most surprising world junior champions, winning this year's competition with 10 points in 13 games and outscoring 20 rivals who were rated above him. Former U.S. champion Hikaru Nakamura, 19, would have had great chances to win the world junior title. But instead of competing in Yerevan, Nakamura went to Spain, to play in the Barcelona Casino tournament. In the second round, he outplayed Poland's grandmaster Michal Krasenkow in the Catalan opening and finished the game with a smashing queen sacrifice, leading to a successful king hunt.
1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.0-0 0-0 6.b3 a5 (Played with the intention of 7.d4 a4! 8.bxa4?! dxc4, clearing the queenside.) 7.Nc3 c6 8.d4 Nbd7 9.Qc2 b6 10.e4 Ba6 11.Nd2 (The best way to protect the pawn on c4 is 11.e5 Ne8 12.Ne2.) 11...c5!? (A well-timed strike in the center, attacking white's d-pawn.) 12.exd5 (After 12.dxc5 d4! 13.Na4 bxc5 14.e5?! Nxe5 15.Bxa8 Qxa8 black has excellent compensation for the exchange.) 12...cxd4 13.Nb5 exd5! (13...Bxb5 is met by 14.dxe6!) 14.Nxd4 Rc8 (White's c-pawn is suddenly under strong pressure.) 15.Re1 b5 16.Bb2 Re8 17.Qd1 (Giving up the pawn with 17.Rad1 bxc4 18.bxc4 Bxc4 19.Nxc4 Rxc4 20.Qf5 is better.) 17...bxc4 18.bxc4 Qb6! (A prelude to a deep tactical sequence. Taking a pawn 18...Bxc4 19.Nxc4 Rxc4 gives white the chance to fight back with 20.Nf5 Bc5 21.Qd2!) 19.Rb1 dxc4! (Provoking white into a wrong combination.) 20.Nc6? (A blunder. White should have tried 20.Bc3 Qc5 21.Qa4.) 20...Rxc6 21.Bxf6? (Krasenkow most likely overlooked black's next move. He should have played 21.Rxe7 Rxe7 22.Bxf6 Nxf6 23.Rxb6, although after 23...Rxb6, black has a clear advantage.)
21...Qxf2+!! (This explosive queen sacrifice is a brilliant refutation of white's play. The white king is flushed out and the hunt begins.) 22.Kxf2 (After 22.Kh1 Rxf6 23.Ne4 Qa7 black wins.) 22...Bc5+ 23.Kf3 (The alternatives are not good either: 23.Kf1 c3+ 24.Re2 c2! wins; or 23.Re3 Bxe3+ 24.Ke1 Bxd2+ 25.Kxd2 Rd6+ wins; 23.Bd4 Bxd4+ 24.Kf3 Rf6+ 25.Kg4 Ne5+ 26.Rxe5 Bc8+ wins.) 23...Rxf6+ 24.Kg4 Ne5+ 25.Kg5 (25.Rxe5 is met by 25...Bc8+; and after 25.Kh4 Rh6+ 26.Kg5 Rg6+ 27.Kh5 Bc8! wins.) 25...Rg6+ 26.Kh5 (Black also wins after 26.Kf4 Nd3+; and after 26.Kf5 Bc8+ 27.Ke4 Rd6!) 26...f6 (26...Bc8! 27.Ne4 Be7 closes the mating net faster.) 27.Rxe5 (27.Bd5+ only prolongs the game after 27...Kh8 28.Kh4 Rh6+ 29.Qh5 g5+ 30.Kh3 Rxh5+ and black wins.) 27...Rxe5+ 28.Kh4 Bc8! (Black mates either after 29.Bf3 Rh6+ 30.Bh5 g5 mate; or after 29.Bd5+ Rxd5 30.g4 Rd3 31.Qf3 Bf2+ 32.Kh3 Rxg4 33.Rb8 Rg3+ 34.Kh4 Rh3 mate.) White resigns.
Solution to today's three-mover by S. Loyd (White: Kc5,Qd3; Black: Ka5,Bd1,P:c6,c7): 1.Qg3 Bf3 (1...Ka4 2.Qc3 and 3.Qb4 mate; 1...Ka6 2.Qxc7 and 3.Qb6 mate) 2.Qg8! Ka4 3.Qa2 mate.