Here are some chess puzzles from the games won by computers.
White to move and win except where noted.

Solutions are between the brackets under each puzzle.
Drag your cursor from one bracket to the other.

a)
"Bebe" vs "Philidor X", USA, 1983
r1b1k2r/1p1n1ppp/p2Qpn2/6B1/4N1q1/3B4/PPP2PPP/R4RK1 w kq - 0 1
[ f3 if Qh5 h4 ]

b)
"Chaos" vs "Advance 3.0", USA, 1983
r4rk1/5pp1/P3pn1p/8/3q4/b1N2P2/1nBBQP1P/1R2R1K1 w - - 0 1
[ Nb5 Qc4 Nxa3 Qxa3 Bc1 ]

c)
White Mates in 5. "Belle Constellation" vs Stephen Gordon, Pasadena, 1983
8/pR5p/3Nkpp1/2p4q/2P3nb/1P4Q1/P3PnK1/2B2R2 w - - 0 1
[ Nc8+ if Bxg3 Re7+ w/e4# ]

d)
"Mephisto Mega IV C" vs Jeroen Noomen, Dieren, 1988
3r2n1/3r1p1k/1p2q1pp/2pRB3/p1P1P3/P3Q1P1/1P5P/3R2K1 w - - 0 1
[ Bc7 ]

e)
White Mates in 5. "IBM Challenger 9" vs Alexei Suetin, Moscow, 1988
r4r2/3R3p/p3p3/2b2q1k/8/2p2PQ1/PP3P2/R5K1 w - - 0 1
[ Rxh7+ w/Kg2 ]

Computer Puzzles, Part II. White to move and win except where noted.
a)
"LChess" vs "Delta", Netherlands, 1988
r2q3r/pppk1ppp/2n2n2/3p4/1bPP2b1/3B1N2/PP1B1PPP/RN1QR1K1 w - - 0 1
[ Bxb4 if Nxb4 Qa4+ w/cxd5 & Ne5+ ]

b)
"Novag X" vs Vivek Rao, 1988
1r3r1k/p3p1bp/q2p1np1/1b6/4P1P1/1Q2BN2/PPP1B3/1K1R3R w - - 0 1
[ Nh4 ]

c)
"Mephisto Portoroz" vs Stefan Mays, Cologne, 1989
2r5/1p1Rr1bp/pBn2k2/4pp2/5p2/1BP5/PP3PPP/3R2K1 w - - 0 1
[ R1d6+ if Kg5 Rxc6 ]

d)
"Deep Thought" vs "Cray Blitz", Edmonton, 1989
rb2k3/p2b1pr1/2p4p/4P2P/2pNBPn1/P5B1/1PK5/4R2R w q - 0 1
[ e6 fxe6 Nxe6 if Rg8 Bg6+ ]

e)
White Mates in 5. "F/M Challenger X" vs "Dappet", Edmonton, 1989
3r3r/3nb1kp/5p1R/1p1RpQPB/p3P3/P3BK2/1q6/8 w - - 0 1
[ gxf6+ if Bxf6 Rxd7+ or if Nxf6 Rg6+ ]



Computer Puzzles, Part III. White to move and win except where noted.
a)
"Zarkov" vs "Chess", Edmonton, 1989
r1b2rk1/pp2bppp/4pn2/2p3N1/3q4/6P1/PPQBPPBP/R4RK1 w - - 0 1
[ Bc3 w/Bxf6 ]

b)
White Mates in 4. "Deep Thought" vs Eric Cooke, New York, 1989
1q2r3/1b3kpp/1p6/p5Q1/Pn1r4/5P2/1P4PP/2R1R1K1 w - - 0 1
[ Rc7+ if Qxc7 Qf5+ ]

c)
"Mephisto Almeria" vs Eric Chapa, New York, 1989
8/8/5p2/4k1pp/p1P4P/P3K1P1/8/8 w - - 0 1
[ g4 ]

d)
"Deep Thought" vs David Levy, USA, 1989
1r2r1k1/1q1bppbp/ppnp1np1/8/1PP1PP2/P1NBBN1P/5QP1/2R2RK1 w - - 0 1
[ e5 if Nh5 g4 ]

e)
"Fidelity Mach 3" vs Peter De Jonghe, USA, 1989
rq2k1nr/pp1n4/3bb3/1N1p1p1p/1P1Pp1p1/P3P3/1B1NBPPP/2RQ1RK1 w - - 0 1
[ Rc8+ ]


Computers of 1990-94; 1995-99

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