Here are some chess puzzles from the Nimzo-Indian, Three Knights (ECO E21).



1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3



Solutions are between the brackets under each puzzle.
Drag your cursor from one bracket to the other.
White to move and win except where noted.

a)
Ignacio Fernandez vs Fernandez Diez, Asturia, 2000
r2q1r1k/p2n1ppp/1p2pn2/1Bp3B1/Q2P4/4PP2/PP3P1P/R3K1R1 w - - 0 1
[ Bxd7 if Qxd7 Bxf6 ]

b)
Sven Hamann vs Frank Hermannsdoerfer, Germany, 2000
rn1q1rk1/p1ppb1pp/1p6/3Ppp2/2P5/6P1/PP2PPNP/R1BQ1RK1 w - - 0 1
[ d6 if Bxd6 Qd5+ ]

c)
Thomas Maes vs Stephane Vaillant, Le Touquet, 2005
r2qk2r/p2b1p2/1p1p3p/n1pPp1pn/2P5/2Q1P1B1/PP1N1PPP/2KR1B1R w k - 0 1
[ Bxe5 ]

d)
Soto Larrea vs Erich Brunner, Mexico City, 1932
r3nrk1/2p2ppp/bp1pq3/p4N2/2P1P3/P1B1QP2/1P4PP/4RRK1 w - - 0 1
[ Bxg7 if Nxg7 Qg5 Qe5 f4 ]

e)
White Mates in 5. Kari Sorri vs Jan Johansson, Helsinki, 1991
4kr1r/pb1p1p1p/np2pQ2/2qP4/2PN3P/2PB1R2/P4PP1/R4K2 w - - 0 1
[ Nf5 if Rfg8 d6 ]

Recent E21 Games


E21 Puzzles, Part II. Black to move and win except where noted.
a)
Laszlo Sapi vs Peter Dely, Budapest, 1964
r3k2r/pbpp1p1p/1p6/2n5/1n3B2/5NP1/PP2PP1P/3RKB1R b Kkq - 0 1
[ ...Ncd3+ ]

b)
Black Mates in 4. Johanna Paasikangas-T vs Gediminas Rastenis, Joensuu, 1989
r5k1/pbpn2pp/1p1pp1r1/5p2/1PPP3q/P3P1P1/3Q1P1P/R1BB1RK1 b - - 0 1
[ ...Qxh2 ]

c)
Brunet Martinez vs Villa Izquierdo, Tarrega, 1995
3r1rk1/p1p2pp1/1pn1pq1p/8/1b1P1P2/2PQB1P1/P4PBP/R3K2R b - - 0 1
[ ...Nxd4 if Bxd4 Rxd4 ]

d)
Siegfried Volk vs Volker Seifert, Crailsheim, 2000
r5k1/pbpn2pp/1p1pp1r1/5pn1/1PPP3q/P2BPP2/2QNR1PP/R1B3K1 b - - 0 1
[ ...Bxf3 if Nxf3 Nxf3+ mates ]

e)
Afag Khudaverdieva vs Zeinab Mamedjarova, Baku, 2002
r2q1rk1/pbpn2pp/1p1pp3/5p2/2PP1Q2/P2BPN2/1P3PPP/R3K2R b - - 0 1
[ ...e5 w/...e4 ]

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