## King-pawn Opening Series

### Here are some chess puzzles from the games by computers (1990-94). The color disk on the diagram indicates who moves first.

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

a)
White mates in 7.
"Hitech" vs Fred Van Der Vliet, Hague, 1990
2rqk3/p3n2p/bP2Q1p1/5r2/3P4/1B6/P4PPP/2R1R1K1 w - - 0 1
[ Qg8+ if Kd7 or Rf8 Ba4+ ]

b)
White mates in 2.
"Mach IV" vs Piet Bakker, Hague, 1990
2krr3/1p1n1p1p/p1bB1np1/8/P1R1p3/1PN5/2P1BPPP/3R2K1 w - - 0 1
[ Rxc6+ ]

c)
"Mephisto Lyon 68030" vs E Schlueter, Dortmund, 1991
1rb3rk/1p3p1p/pNn1pb2/7q/N1Pp4/P5PP/1P1Q1PB1/3RR1K1 w - - 0 1
[ Bxc6 if bxc6 Qf4 ]

d)
White mates in 4.
"Mephisto" vs Alexander Munninghof, Hague, 1991
3Q4/4r1pp/b6k/6R1/8/1qBn1N2/1P4PP/6KR w - - 0 1
[ Bxg7+ Rxg7 Qf6+ Rg6 Qf8+ ]

e)
"Novag" vs Michael Hoving, Hague, 1991
3R4/1R3p2/B1p1pp2/2kp3p/3bPP2/8/P1q3PP/7K w - - 0 1
[ Rb5+ if cxb5 Rc8+ ]

1e)
"Novag" vs Michael Hoving

Computer Puzzles, Part II.
The color disk on the diagram indicates who moves first.
a)
"Dappet" vs "Delta", Netherlands, 1991
r3kbnr/pp1qpppp/2n5/8/3P2b1/2N2N2/PP3PPP/R1BQKB1R w KQkq - 0 1
[ d5 if Nb8 Bb5 ]

b)
"Novag" vs Peter Frost, Melbourne, 1992
r5k1/pp4pp/2nbrqn1/3p4/6P1/7P/PPP2PB1/R1BQR1K1 w - - 0 1
[ Rxe6 if Qxe6 Bxd5 ]

c)
"Goldbar" vs "Duck", Utrecht, 1992
r4rk1/pbp3pp/2p1q3/4N3/4p3/2Q5/PPP2PPP/R2R2K1 w - - 0 1
[ Nd7 Rf7 Nc5 if Qc8 Qb3 ]

d)
White mates in 3.
"Socrates Expert" vs Alexander Ivanov, Boston, 1993
3k4/1R6/3N2n1/p2Pp3/2P1N3/3n2Pp/q6P/5RK1 w - - 0 1
[ Rf8+ Nxf3 Nf7+ ]

e)
"Mephisto Vancouver" vs Oliver Kraus, Dormund, 1993
8/3bq1k1/3Np1p1/4PpNp/1n1P3P/Q7/p4PPK/8 w - - 0 1
[ Qxb4 if a1/Q Nxf5+ mates ]

2d)
mate in 3
"Socrates Expert" vs Alexander Ivanov

Computer Puzzles, Part III.
The color disk on the diagram indicates who moves first.
a)
"Schach 3" vs Wim Van Der Wijk, Hague, 1993
rnb1k2r/p3bpp1/2pp1q1p/4p3/4P3/2N2N2/PPP2PPP/R2QKB1R w KQkq - 0 1
[ Nd5 if cxd5 Qxd5 ]

b)
"Schach 3" vs "Goldbar", Leiden, 1993
1rb4k/2p1N1pp/3p1r1q/1p6/5nR1/1P4Q1/2P2PPP/3R1BK1 w - - 0 1
[ Nxc8 Rxc8 Rh4 if Qg6 Rxf4 or if Nh5 Qh3 ]

c)
"Greif" vs "Nightmare", Munich, 1993
4r1k1/p1pq2pp/Q1p5/1rb2p2/8/2B1R3/PP3PPP/1R4K1 w - - 0 1
[ Rxe8+ Qxe8 a4 if Rb8 or Rb3 Qc4+ ]

d)
"Fritz 2" vs Herman Grooten, Hague, 1994
r1q1kb1r/3n1p2/ppNppp2/1N6/2P4p/4PQ2/PP3PPP/R3K1R1 w Q - 0 1
[ Nca7 if Qb8 Qxa8 ]

e)
White mates in 4.
"Chess Guru" vs "Francesca", London, 1994
5r2/1pP1b1p1/pqn1k2p/4p3/QP2BP2/P3P1PK/3R4/3R4 w - - 0 1
[ Qb3+ Kf6 Rd6+ ]

3e)
mate in 4
"Chess Guru" vs "Francesca"

Computer Puzzles, Part IV.
The color disk on the diagram indicates who moves first.
a)
"Hiarcs" vs "Psycho", London, 1994
rnbqr1k1/2p2ppp/pp2p1n1/3P4/2B1P3/5N2/PP1QNPPP/2RR2K1 w - - 0 1
[ dxe6 ]

b)
"MChess Pro" vs "Centaur", London, 1994
3r2k1/p1r2pp1/Bp2p2p/2bn4/P7/2P5/1P1B1PPP/3RR1K1 w - - 0 1
[ Bf4 if Rcd7 Bb5 or if Bd6 Bxd6 w/c4 ]

c)
White mates in 4.
"Chess Guru" vs "Pawnder", London, 1994
4r3/2B4B/2p1b3/ppk5/5R2/P2P3p/1PP5/1K5R w - - 0 1
[ b4+ axb4 axb4+ Kd5 c4+ ]

d)
"Ferret" vs "Notchess", London, 1994
r1bqk2r/pp1pbppp/2n1p3/2n1P3/2P5/P1N1BN2/1P3PPP/R2QKB1R w KQkq - 0 1
[ b4 ]

e)
"Hiarcs" vs "Mirage", London, 1994
r3r1k1/2pbq1p1/p3p2p/1pPPNp2/1P6/P1Q5/5PPP/2R1R1K1 w - - 0 1
[ d6 cxd6 cxd6 if Qd8 Qc7 Qxc7 Rxc7 or if Qxd6 Rcd1 ]

4c)
mate in 4
"Chess Guru" vs "Pawnder"

Computer Puzzles, Part V.
The color disk on the diagram indicates who moves first.
a)
"The King" vs "Delta", Leiden, 1994
r2qkb1r/2pnppp1/p3bn1p/6N1/NppPP3/4B3/PP2BPPP/R2QK2R w KQkq - 0 1
[ Nxe6 if fxe6 Bh5+ mates ]

b)
"MChess Pro" vs "Notchess", London, 1994
r3r3/pppqb2k/5pp1/7p/2P2Q2/1P2R3/PB3PPP/4R1K1 w - - 0 1
[ Qd4 if Rad8 Qxd7 Rxd7 Bxf6 ]

c)
White mates in 5.
"MChessPro" vs "Psycho", London, 1994
rnbqr1k1/pp1pb1pp/8/2p1P1N1/4N3/2P4P/P4KP1/R1BQ3R w - - 0 1
[ Qd5+ Kh8 Nf7+ Kg8 Nh6+ ]

d)
White mates in 3.
"Mirage" vs "Francesca", London, 1994
6kr/p1Q3pp/3Bbbq1/8/5R2/5P2/PP3P1P/4KB1R w - - 0 1
[ Qd8+ Kf7 Qe7+ Kg8 Qf8# ]

e)
"Novag" vs Daniel Dwyer, Perth, 1994
7r/2kbbprp/p2ppp2/4qP1Q/P1pNP3/2N3P1/1PP4P/1K1RR3 w - - 0 1
[ Nd5+ if Kd8 Nf3 or if exd5 exd5 Rg5 Qxf7 Rf8 Qxh7 ]

f)
"Novag" vs John Fletcher, Perth, 1994
r4rk1/pq2bp1p/1p4p1/3Nn3/2p5/P3P3/1PQ2PPP/R1BR2K1 w - - 0 1
[ Qe4 if Nc6 Nxe7+ ]

5c)
mate in 5
"MChessPro" vs "Psycho"

Computer puzzles (1990-4), pt. vi.
The color disk on the diagram indicates who moves first.
a)
Black mates in 5.
"Shess" vs "Rebel", Netherlands, 1990
5rk1/pQ4pp/2n5/3b4/3q4/8/PP4PP/3R2RK b - - 0 1
[ ...Bxg2+ if Rxg2 Qxd1+ Rg1 Qd5+ or if Kxg2 Rf2+ ]

b)
Black mates in 4.
"Dr Schaak" vs "Shess", Netherlands, 1990
5rk1/p1p2ppp/5n2/2b1p3/2n5/5PK1/PB4PP/RN1q1BNR b - - 0 1
[ ...Qe1+ Kh3 g5 g4 Qxf1+ ]

c)
Black mates in 2.
"Nest" vs "Cumulus", Lyons, 1990
2k5/pbpp2pp/1b6/8/3PP3/P1N1K3/2P2r2/R1B2q2 b - - 0 1
[ ...c5 ]

d)
Black mates in 2.
Patrick Wolff vs "Alpha I", Cambridge, 1991
5bk1/5pp1/7p/3Rn3/3NpP2/2P3Pb/3B1K1P/1r3N2 b - - 0 1
[ ...Ng4+ ]

e)
"Mephisto Polgar" vs "Mephisto Portoroz 68030", Budapest, 1991
3r2k1/p4pp1/1p5p/3q1Pn1/3Pn2N/P5P1/6QP/3R2BK b - - 0 1
[ ...Rc8 Re1 Rc2 if Qxc2 Nxg3# ]

6b)
Black mates in 4.
"Dr Schaak" vs "Shess"

Computer puzzles (1990-4), pt. vii.
The color disk on the diagram indicates who moves first.
a)
Gennadi Sosonko vs "Mephisto 60 MHz", Hague, 1991
4Qb1r/1pk4p/p1p2qp1/8/4P3/P1N4P/1P2KP2/2R5 b - - 0 1
[ ...Bc5 if Nd5+ cxd5 Rxc5+ Kb6 ]

b)
"Nightmare (D)" vs "Hiarcs", Vancouver, 1991
4rrk1/1pp2ppp/p2b3q/3p1b2/PP1Pn3/1Q2PN2/1B2BPPP/2R2RK1 b - - 0 1
[ ...Nd2 ]

c)
Arndt Schmidt "Saitek Risc 2500", Goch, 1992
r3r1k1/1p3qpp/1np5/p4p2/P2P4/1bQ1BP1P/1P2B1P1/R4RK1 b - - 0 1
[ ...f4 ]

d)
Black mates in 5.
Stefano Tatai vs "Chess Machine", Dortmund, 1992
6k1/1pR4p/6p1/pQ1pq3/8/P3P2r/5rP1/2R3K1 b - - 0 1
[ ...Rxg2+ if Kxg2 Rh2+ Kf1 Qf6+ or if Kf1 Qf5+ ]

e)
Black mates in 2.
"Mato Grosso" vs "Nightmare", Utrecht, 1992
r3k2r/p2n1ppp/2pbp3/8/8/1K1B1N2/P4PPP/RNq5 b kq - 0 1
[ ...Nc5+ Kb4 a5# ]

7a)
Gennadi Sosonko vs "Mephisto 60 MHz"br>
Computer puzzles (1990-4), pt. viii.
The color disk on the diagram indicates who moves first.
a)
Black mates in 4.
"ZZZZZZ" vs "Dappet", Netherlands, 1992
2r2rk1/p5b1/2p1b2p/2P3p1/QP2P3/P4qP1/3R3P/1N2R1K1 b - - 0 1
[ ...Bd4+ Rxd4 Qf2+ Kh1 Qxe1+ ]

b)
Black mates in 2.
"Delicate Brute" vs "Ulysses", Madrid, 1992
6r1/5k2/1pq1p2Q/2b2N2/2r4p/3p1P2/P5PP/R3RK2 b - - 0 1
[ ...Qxf3+ ]

c)
Max Pam vs "Rebel", Hague, 1993
2b1r1k1/5pp1/N1pb1q1p/3pN3/1P1P4/4P2P/1Q3PP1/R5K1 b - - 0 1
[ ...Rxe5 if dxe5 Bxe5 ]

d)
"Rookie" vs "Shess", Leiden, 1993
8/5pk1/5qp1/6p1/8/1Qp3P1/3r1P1P/R2N2K1 b - - 0 1
[ ...c2 ]

e)
Black mates in 2.
Heleen De Greef vs "The King I", Hague, 1993
6k1/7p/2N3p1/5p2/2N1nP1b/3p1K1P/6P1/2B2b2 b - - 0 1
[ ...Be2+ ]

8a)
mate in 4
"ZZZZZZ" vs "Dappet"

Computer puzzles (1990-4), pt. viiii.
The color disk on the diagram indicates who moves first.
a)
Klaus Pokorny vs "Fritz 2", Munich, 1994
r2qr1k1/ppp2ppp/2nb4/3p1b2/3Pn3/1P2BN1P/P1PNBPP1/R2Q1RK1 b - - 0 1
[ ...Nc3 Qe1 Nb4 Rc1 Ncxa2 ]

b)
Black mates in 2.
"Milobarus" vs "Vancouver 68030", Wels, 1994
2k5/pp3pB1/4p3/2q2r1p/Q5nP/7K/PPPr2P1/R5R1 b - - 0 1
[ ...Qe3+ ]

c)
Black mates in 3.
Henny Maliangkay vs "Check Check", Hague, 1994
5rk1/1pp3b1/p3P2p/7Q/3PK3/PnP4P/Bq6/R7 b - - 0 1
[ ...Qc2+ Kd5 Rd8+ Kc4 Rxd4# ]

d)
Black mates in 3.
"LChess" vs "WChess", London, 1994
3B1rk1/p1p3pp/1p6/1P2p3/P6K/3PQ3/R1P2PqP/4nR2 b - - 0 1
[ ...Rf3 if Qxf3 Nxf3+ or if Rxe1 Qh3+ ]

e)
Wobb vs "Fritz 2", Munich, 1994
2r1k2r/pp3p1p/2q2np1/3pp3/8/bPN1PQN1/P1P2PPP/R4RK1 b k - 0 1
[ ...e4 if Qf4 Qxc3 ]

9a)
Klaus Pokorny vs "Fritz 2"

Computers of The 80s; 1995-99

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