See 3 or 4 moves ahead

Here are some chess puzzles from the games of Michael Stean.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)
John Nunn vs Michael Stean, Islington, 1970
r5k1/1bq2rpp/p2p1b2/7Q/1P1NP3/p2R4/P1P3BP/1K1R4 b - - 0 1
[ ...Bxd4 if Rxd4 Qc3 ]

b)
Gyula Sax vs Michael Stean, Teeside, 1975
r5k1/3r1p2/P1n1p1p1/1Q5p/RBNbq3/1P5P/2P3P1/3R3K b - - 0 1
[ ...Rb8 if Qg5 Rxb4 or if Nd6 Be5 ]

c)
David Bronstein vs Michael Stean, London, 1976
2r2rk1/1R1bppbp/p5p1/q2B4/3NP3/8/P4PPP/3Q1RK1 b - - 0 1
[ ...Ba4 if Qd3 e6 or if Bb3 Rcd8 ]

d)
Harm Cording vs Michael Stean, Hamburg, 1977
2rq1rk1/3nppbp/p2p1np1/1P6/3BP3/1PN2N2/P3QPPP/R4RK1 b - - 0 1
[ ...e5 ]

e)
Michael Stean vs Kick Langeweg, Amsterdam, 1978
1q3r1k/1p3p1p/p1b5/6Q1/8/1P4P1/P1r1PP1P/R2R2K1 w - - 1 0
[ Qf6+ Kg8 Qf5 if Rc3 Qg5+ Kh8 Qf6+ ]

1e)
Michael Stean vs Kick Langeweg

Michael Stean puzzles, pt. ii.
The color disk on the diagram indicates who moves first.
a)
Konstanty Kaiszauri vs Michael Stean, Buenos Aires, 1978
8/1R1pk1pp/4np2/2P1p3/4P3/1P1NR1P1/r2r1PKP/8 b - - 0 1
[ ...Rxd3 Rxd3 Nxc5 ]

b)
Ralf Lau vs Michael Stean, Munich, 1979
r4r1k/3nbppp/p3p3/4P3/1pqNRBQ1/8/PPP3PP/4R2K b - - 0 1
[ ...Nc5 if b3 Nxe4 bxc4 Nf2+ ]

c)
Israel Zilber vs Michael Stean, Hastings, 1980
2r5/6p1/3k1p1p/pb1pp3/1b1P4/1P2P3/3N1PPP/2RKN3 b - - 0 1
[ ...Be2+ ]

d)
White mates in 5.
Michael Stean vs Petter Stigar, Oslo, 1981
3r3k/6Rp/8/p3pN2/4n3/Pq2P1P1/4QP1P/6K1 w - - 0 1
[ Rxh7+ if Kxh7 Qh5+ ]

2d)
mate in 5
Michael Stean vs Petter Stigar

English GMs

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