Garry Kasparov was disappointed and angry after he lost to Deep Junior last Thursday at the New York Athletic Club. The six-game, $1 million "Man vs. Machine" match was tied with 1 1/4 points each at its midpoint, and Kasparov should have been ahead, perhaps 3-0.

Kasparov smashed the machine in 27 moves in the first game, but he lost his concentration at vital points in the next two games. Having the machine on the ropes in Game 2, he missed a promising continuation and Deep Junior escaped with a draw. Kasparov dominated the third game, but the computer refused to give up, slowly improving its position. Still, the world's top-ranked player could have forced a draw, but a one-move slip gave him a lost game.

The Bayonet Attack

Kasparov's teacher, the late world champion Mikhail Botvinnik, conceived the idea of a kingside bayonet attack (g2-g4) in a Queen's Gambit game against Vladimir Alatortsev in a tournament of Leningrad masters in 1934. This striking discovery had a profound influence on modern play, appearing in many different forms in queen-pawn openings.

Botvinnik -- Alatortsev

1.d4 e6 2.c4 d5 3.Nf3 Be7 4.Nc3 Nf6 5.Bg5 0-0 6.e3 a6 7.cxd5 exd5 8.Bd3 c6?! 9.Qc2 Nbd7 10.g4! (Powerful and almost decisive, threatening 11.Bxf6 Nxf6 12.g5.) 10...Nxg4? (Helping white to open the g-file. The weakening 10...g6 was relatively best.) 11.Bxh7+ Kh8 12.Bf4! Ndf6 (Going after the bishop with 12...g6 loses to 13.Bxg6! fxg6 14.Qxg6 Ngf6 15.Ng5 Qe8 16.Qh6+ Kg8 17.Rg1 and black is finished.) 13.Bd3 Nh5 14.h3 Ngf6 15.Be5 Ng8 16.0-0-0 Nh6 17.Rdg1 (Too many knight moves by black allowed white to set up his forces for the final assault.) 17...Be6 18.Qe2 Bf5? (The last blunder, but even after 18...Nf6 19.Ng5 black is doomed.) 19.Bxf5 Nxf5 20.Nh4! (Winning at least a piece.) Black resigned.

In two games as white, Kasparov applied a modification of Botvinnik's idea against Deep Junior's Semi-Slav defense.

Kasparov -- Deep Junior (Game 3)

1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 b6 (The Deep Junior programmers shift into a more flexible variation after their machine tumbled in the first game with 6...Bd6 7.g4!? [Brought to life in the early 1990s by the current U.S. champion, Alexander Shabalov.] 7...dxc4 8.Bxc4 b6 9.e4 e5 10.g5 Nh5 11.Be3 0-0 12.0-0-0 Qc7 13.d5! b5? 14.dxc6 bxc4 15.Nb5 Qxc6 16.Nxd6 Bb7 17.Qc3 Rae8?! 18.Nxe8 Rxe8 19.Rhe1 Qb5 20.Nd2 Rc8 21.Kb1 Nf8 22.Ka1 Ng6 23.Rc1 Ba6 24.b3 cxb3 25.Qxb3 Ra8 26.Qxb5 Bxb5 27.Rc7 and Deep Junior resigned.) 7.cxd5 exd5 8.Bd3 Be7 9.Bd2 (Keeping open on which side to castle.) 9...0-0 (After black declares his intention, Kasparov tries to win a blitzkrieg like Botvinnik almost 70 years ago.)

10.g4!? Nxg4 11.Rg1 (There was nothing wrong with 11.Bxh7+ Kh8 12.Rg1 Ngf6 13.Bd3 and white is better.) 11...Ndf6 12.h3 Nh6 13.e4! (Opening his dark-squared bishop with force. It is hard to imagine that black can withstand white's attacking fury.) 13...dxe4 14.Bxh6?! (A pleasant surprise for Deep Junior, since 14.Bxe4! Kh8 15.Bxh6 gxh6 16.Bxc6 Rb8 17.0-0-0 seems more dangerous for black.) 14...exd3 15.Rxg7+ (After 15.Bxg7 Ng4! [Not 15...dxc2?? 16.Bxf6+ Bg4 17.Rxg4 mate.] 16.Qxd3 Kxg7 17.hxg4 Bg5 black can defend.) 15...Kh8 16.Qxd3 Rg8 17.Rxg8+ Nxg8 18.Bf4 f6! (The key defensive move, covering squares e5 and g5 and opening the seventh rank to protect the h-pawn, if needed. Black has good chances to hold.) 19.0-0-0 Bd6 20.Qe3 Bxf4 21.Qxf4 Bxh3! (The capture might have scared some humans, but Deep Junior calculated that it could get away with it.) 22.Rg1 Qb8! (Contesting the dark squares gives black a chance to rebound.) 23.Qe3 (On 23.Qh4 comes 23...Be6.) 23...Qd6 24.Nh4 (Hitting the bishop and controlling the square f5 gives white some attacking prospects along the h-file.) 24...Be6 25.Rh1 Rd8 (Calmly protecting the queen and preparing a counterattack.) 26.Ng6+ Kg7 27.Nf4 Bf5 28.Nce2 Ne7 29.Ng3 (Threatening 30.Qxe7+! Qxe7 31.Nxf5+, winning.) 29...Kh8 30.Nxf5 Nxf5 31.Qe4 Qd7 (A critical stage for Kasparov.)

32.Rh5? (A blunder in time trouble, giving black the upper hand. Kasparov had two ways to secure a draw. The first is 32.Ng6+ Kg7 33.Nf4 and black has nothing better than 33...Kh8. The second way is 32.Qg2!?, for example 32...Nxd4 33.Qg6!, with the idea 33...Qg7 34.Rxh7+! Qxh7 35.Qxf6+; or 32...Qxd4 33.Ng6+ Kg8 34.Ne7+ Kf7 35.Rxh7+ Ke6 36.Qxc6+ Nd6 37.Nd5! Qc4+ and a draw is likely.) 32...Nxd4 33.Ng6+? (Kasparov burns the last bridge behind him. The only chance to continue was to cover the first rank with 33.Rh1.) 33...Kg8! (After 33...Kg7? 34.Rxh7+ Kxh7 35.Nf8+ white wins.) 34.Ne7+ Kf8 35.Nd5 (Kasparov sees too late that after 35.Rxh7 Nb3+ 36.Kc2 [On 36.axb3 Qd1 mates.] 36...Na1+ 37.Kc3 Qd2+ 38.Kc4 b5+ 39.Kc5 Qd6 mates.) 35...Qg7! 36.Qxd4 Rxd5 (After 37.Rxd5 cxd5 white is two pawns down in a hopeless queen endgame since 38.Qxd5 loses to 38...Qg5+.) White resigned.

Solution to today's study by G. Brenev (White: Kh5,Nd8; Black: Kh1,Bd5,P:f4): 1.Kg4 f3 2.Kg3 Kg1 3.Ne6! f2 4.Nf4! f1Q (On 4...Be6 5.Ne2+ Kf1 6.Nf4 Bf5 7.Kf3! draws.) 5.Nh3+ Kh1 6.Nf2+ draw.

White draws.