rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PP2PPPP/R1BQKBNR w KQkq - 2 4 ; E20 Nimzo-Indian Defense
rnbqk2r/pppp1ppp/4pn2/8/1bPPP3/2N5/PP3PPP/R1BQKBNR b KQkq - 0 4 ; E20 Nimzo-Indian Defense: Dilworth Gambit
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq - 0 4 ; E20 Nimzo-Indian Defense: Kmoch Variation
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2NQ4/PP2PPPP/R1B1KBNR b KQkq - 3 4 ; E20 Nimzo-Indian Defense: Mikenas Attack
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N3P1/PP2PP1P/R1BQKBNR b KQkq - 0 4 ; E20 Nimzo-Indian Defense: Romanishin Variation
rnbq1rk1/pp1p1ppp/4pn2/2p5/1bPP4/2N2NP1/PP2PPBP/R1BQK2R b KQ - 2 6 ; E20 Nimzo-Indian Defense: Romanishin Variation
rnbq1rk1/pp3ppp/4p3/3n4/1b1N4/2N3P1/PP2PPBP/R1BQK2R w KQ - 0 9 ; E20 Nimzo-Indian Defense: Romanishin Variation, English Hybrid
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq - 3 4 ; E21 Nimzo-Indian Defense: Three Knights Variation
rnbqk2r/pp1p1ppp/4p3/2pP4/1bP1n3/2N2N2/PP2PPPP/R1BQKB1R w KQkq - 1 6 ; E21 Nimzo-Indian Defense: Three Knights Variation, Euwe Variation
rnbqk2r/pp1p1ppp/4pn2/2pP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R b KQkq - 0 5 ; E21 Nimzo-Indian Defense: Three Knights Variation, Korchnoi Variation
rnbqk2r/p2p1ppp/4pn2/1ppP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R w KQkq - 0 6 ; E21 Nimzo-Indian Defense: Three Knights Variation, Shocron Gambit
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/1QN5/PP2PPPP/R1B1KBNR b KQkq - 3 4 ; E22 Nimzo-Indian Defense: Spielmann Variation
r1bqk2r/pp1p1ppp/2n1p3/2P5/1bP5/1QN2N2/PP1nPPPP/R3KB1R w KQkq - 0 8 ; E23 Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation
r1bqk2r/pp1p1ppp/2n1pn2/2P5/1bP5/1QN5/PP2PPPP/R1B1KBNR w KQkq - 1 6 ; E23 Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit
r1bqk2r/pp1p1ppp/2n1p3/2n5/1bP5/1QN2N2/PP1BPPPP/R3KB1R w KQkq - 0 8 ; E23 Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation
r1bqk2r/pp1p2pp/2n1p3/2n2p2/1bP5/2N2NP1/PPQBPP1P/R3KB1R b KQkq - 0 9 ; E23 Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/P1N5/1P2PPPP/R1BQKBNR b KQkq - 0 4 ; E24 Nimzo-Indian Defense: Sämisch Variation
rnbq1rk1/pp3ppp/4p3/2pn4/3P4/P1P1PP2/6PP/R1BQKBNR w KQ - 0 9 ; E24 Nimzo-Indian Defense: Sämisch Variation, Botvinnik Variation
rnbqk2r/pp3ppp/4pn2/2pP4/3P4/P1P2P2/4P1PP/R1BQKBNR b KQkq - 0 7 ; E25 Nimzo-Indian Defense: Sämisch Variation
rnbqk2r/pp3ppp/4p3/2Pn4/8/P1P2P2/4P1PP/R1BQKBNR b KQkq - 0 8 ; E25 Nimzo-Indian Defense: Sämisch Variation, Keres Variation
rnbqk2r/pp4pp/4p3/2Pn1p2/8/P1P2P2/4P1PP/R1BQKBNR w KQkq - 0 9 ; E25 Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation
rnbqk2r/pp1p1ppp/4pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR b KQkq - 0 6 ; E26 Nimzo-Indian Defense: Sämisch Variation
rnbqk2r/p2p1ppp/1p2pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR w KQkq - 0 7 ; E26 Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation
rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR w KQ - 1 6 ; E27 Nimzo-Indian Defense: Sämisch Variation
rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P1P3/5PPP/R1BQKBNR b KQ - 0 6 ; E28 Nimzo-Indian Defense: Sämisch Variation
r1bq1rk1/pp1p1ppp/2n1pn2/2p5/2PP4/P1PBP3/5PPP/R1BQK1NR w KQ - 1 8 ; E29 Nimzo-Indian Defense: Sämisch Variation
r1bqnrk1/p2p1ppp/1pn1p3/2p5/2PPP3/P1PB4/4NPPP/R1BQK2R w KQ - 1 10 ; E29 Nimzo-Indian Defense: Sämisch Variation, Capablanca Variation
rnbqk2r/pppp1ppp/4pn2/6B1/1bPP4/2N5/PP2PPPP/R2QKBNR b KQkq - 3 4 ; E30 Nimzo-Indian Defense: Leningrad Variation
rnbqk2r/p2p1pp1/4pn1p/1ppP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq - 0 7 ; E30 Nimzo-Indian Defense: Leningrad Variation, Averbakh Gambit
rnbqk2r/pp3pp1/3ppn1p/2pP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq - 0 7 ; E31 Nimzo-Indian Defense: Leningrad Variation, Benoni Defense
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR b KQkq - 3 4 ; E32 Nimzo-Indian Defense: Classical Variation
rnbq1rk1/p1pp1ppp/1p2pn2/8/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ - 0 7 ; E32 Nimzo-Indian Defense: Classical Variation, Keres Defense
rnbq1rk1/p1pp1ppp/4pn2/1p6/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ - 0 7 ; E32 Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit
r1bqk2r/ppp2ppp/2nppn2/8/1bPP4/2N2N2/PPQ1PPPP/R1B1KB1R w KQkq - 0 6 ; E33 Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation
r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq - 4 5 ; E33 Nimzo-Indian Defense: Classical Variation, Zurich Variation
rnb1k2r/ppp2ppp/5n2/4pq2/1b1P4/2N2N2/PP2PPPP/R1BQKB1R w KQkq - 0 8 ; E34 Nimzo-Indian Defense: Classical Variation, Belyavsky Gambit
rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq - 0 5 ; E34 Nimzo-Indian Defense: Classical Variation, Noa Variation
rnbqk2r/ppp2ppp/5n2/3p4/1b1P4/2N5/PPQ1PPPP/R1B1KBNR w KQkq - 0 6 ; E35 Nimzo-Indian Defense: Classical Variation, Noa Variation
rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/P1N5/1PQ1PPPP/R1B1KBNR b KQkq - 0 5 ; E36 Nimzo-Indian Defense: Classical Variation, Noa Variation
r1bqk2r/ppp2ppp/2n1pn2/3p4/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQkq - 1 7 ; E36 Nimzo-Indian Defense: Classical Variation, Noa Variation, Botvinnik Variation
rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P1Q5/1P2PPPP/R1B1KBNR w KQkq - 1 7 ; E36 Nimzo-Indian Defense: Classical Variation, Noa Variation, Main Line
rnbqk2r/pp3ppp/4pn2/2pp4/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQkq - 0 7 ; E36 Nimzo-Indian Defense: Classical Variation, Romanishin Gambit
rnbqk2r/pp3ppp/4p3/2pp4/2PPn3/P7/1PQ1PPPP/R1B1KBNR w KQkq - 0 8 ; E37 Nimzo-Indian Defense: Classical Variation, Modern Variation
rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P7/1PQ1PPPP/R1B1KBNR b KQkq - 2 7 ; E37 Nimzo-Indian Defense: Classical Variation, Noa Variation
r1bqk2r/ppp2ppp/2n5/3pp3/2PPn3/P3P3/1PQ2PPP/R1B1KBNR w KQkq - 0 9 ; E37 Nimzo-Indian Defense: Classical Variation, Noa Variation, San Remo Variation
rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq - 0 5 ; E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation
rnbq1rk1/pp3ppp/4pn2/2pp4/1bPP4/2N1PN2/PPQ2PPP/R1B1KB1R w KQ - 0 7 ; E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation
rnbqk2r/pp1p1ppp/4pn2/2P5/2P5/2b5/PPQ1PPPP/R1B1KBNR w KQkq - 0 6 ; E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation
rnbq1rk1/p2p1ppp/1p2pn2/2b5/2P5/P1N2N2/1PQ1PPPP/R1B1KB1R w KQ - 0 8 ; E39 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System
rnbq1rk1/pp1p1ppp/4pn2/2P5/1bP5/2N5/PPQ1PPPP/R1B1KBNR w KQ - 1 6 ; E39 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR b KQkq - 0 4 ; E40 Nimzo-Indian Defense: Rubinstein System
r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq - 1 5 ; E40 Nimzo-Indian Defense: Rubinstein System, Taimanov Variation
rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq - 0 5 ; E41 Nimzo-Indian Defense: Rubinstein System
r1bqk2r/pp3ppp/2nppn2/2p5/2PP4/2PBPN2/P4PPP/R1BQK2R w KQkq - 0 8 ; E41 Nimzo-Indian Defense: Rubinstein System, Hübner Variation
r1bq1rk1/pp3ppp/2nppn2/2p5/2PP4/2PBPN2/P4PPP/R1BQ1RK1 w - - 2 9 ; E41 Nimzo-Indian Defense: Rubinstein System, Hübner Variation
rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq - 1 5 ; E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation
rnbq1rk1/pp1p1ppp/4pn2/8/1bPP4/P1N5/1P2NPPP/R1BQKB1R b KQ - 0 7 ; E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line
rnbq1rk1/pp1p1ppp/4pn2/2P5/1b1P4/2N5/PP2NPPP/R1BQKB1R b KQ - 0 7 ; E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Sherbakov Attack
rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq - 0 5 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQK2R b KQkq - 3 6 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1q1rk1/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ - 4 7 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1q1rk1/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 b - - 5 7 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1q1rk1/pb1p1ppp/1p2pn2/2p5/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 0 8 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1q1rk1/pb1pbppp/1p2pn2/8/N1Pp4/P2BPN2/1P3PPP/R1BQ1RK1 w - - 1 10 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1qk2r/pbpp2pp/1p2p3/5p2/1bPPn3/2NBPN2/PPQ2PPP/R1B1K2R w KQkq - 2 8 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn3rk1/pb1pqppp/1p2pn2/2p5/NbPP4/3BPN2/PP3PPP/R1BQ1RK1 w - - 4 9 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1q1rk1/pbpp1ppp/1p2pn2/8/2PP4/2PBPN2/P4PPP/R1BQ1RK1 b - - 4 8 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rnbqk2r/p1pp1ppp/1p2p3/8/1bPPn3/2N1PN2/PPQ2PPP/R1B1KB1R b KQkq - 2 6 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1qk2r/pbpp2pp/1p2p3/5p2/2PPn3/2PBPN2/P1Q2PPP/R1B2RK1 b kq - 1 9 ; E43 Nimzo-Indian Defense: St. Petersburg Variation
rn1qk2r/pbpp1ppp/1p2p3/8/1bPPn3/2NBPN2/PP3PPP/R1BQK2R w KQkq - 4 7 ; E43 Nimzo-Indian Defense: St. Petersburg Variation, with Ne4
rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq - 1 5 ; E44 Nimzo-Indian Defense: St. Petersburg Variation
rnbqk2r/p1pp1ppp/1p2p3/8/1bPPn3/2N1P3/PP2NPPP/R1BQKB1R w KQkq - 2 6 ; E44 Nimzo-Indian Defense: St. Petersburg Variation, American Variation
rnbqk2r/p2p1ppp/1p2pn2/b1p5/2PP4/P1N1P3/1P2NPPP/R1BQKB1R w KQkq - 1 7 ; E44 Nimzo-Indian Defense: St. Petersburg Variation, Romanishin-Psakhis Variation
rn1qk2r/p1pp1ppp/bp2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R w KQkq - 2 6 ; E45 Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation
rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQ - 1 5 ; E46 Nimzo-Indian Defense: Normal Variation
rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQ - 2 5 ; E46 Nimzo-Indian Defense: Reshevsky Variation
rnbq1rk1/ppp2ppp/3bpn2/3p4/2PP4/P1N1P3/1P2NPPP/R1BQKB1R w KQ - 1 7 ; E46 Nimzo-Indian Defense: Simagin Variation
rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2NBP3/PP3PPP/R1BQK1NR b KQ - 2 5 ; E47 Nimzo-Indian Defense: Normal Variation
rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2NBP3/PP3PPP/R1BQK1NR w KQ - 0 6 ; E48 Nimzo-Indian Defense: Normal Variation, Classical Defense
r1bq1rk1/ppp2ppp/2n1pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 b - - 3 7 ; E48 Nimzo-Indian Defense: Ragozin Defense
rnbq1rk1/ppp2ppp/4pn2/3p4/2PP4/P1PBP3/5PPP/R1BQK1NR b KQ - 0 7 ; E49 Nimzo-Indian Defense: Normal Variation, Botvinnik System
rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1PN2/PP3PPP/R1BQKB1R b KQ - 2 5 ; E50 Nimzo-Indian Defense
rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2N1PN2/PP3PPP/R1BQKB1R w KQ - 0 6 ; E51 Nimzo-Indian Defense: Normal Variation, Ragozin Variation
rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/P1N1PN2/1P3PPP/R1BQKB1R b KQ - 0 6 ; E51 Nimzo-Indian Defense: Normal Variation, Sämisch Deferred
r1bq1rk1/ppp2ppp/2n1pn2/8/1bpP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 0 8 ; E51 Nimzo-Indian Defense: Ragozin Variation
rnbq1rk1/p1p2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ - 0 7 ; E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense
rn1q1rk1/pbp2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 0 8 ; E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense
rnbq1rk1/pp3ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ - 0 7 ; E53 Nimzo-Indian Defense: Normal Variation, Gligoric System
r1bq1rk1/pp1n1ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 2 8 ; E53 Nimzo-Indian Defense: Normal Variation, Gligoric System
rnbq1rk1/p4ppp/1p2pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 0 8 ; E53 Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation
rnbq1rk1/pp3ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 b - - 0 8 ; E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation
rnbq1rk1/pp3ppp/4pn2/8/1bBP4/2N2N2/PP3PPP/R1BQ1RK1 b - - 0 9 ; E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation
rnb2rk1/pp2qppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - - 1 9 ; E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov Variation
r1bq1rk1/pp1n1ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - - 1 9 ; E55 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation
r1bq1rk1/pp3ppp/2n1pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 2 8 ; E56 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense
r1bq1rk1/pp3ppp/2n1pn2/8/1bBp4/P1N1PN2/1P3PPP/R1BQ1RK1 w - - 0 10 ; E57 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense
r1bq1rk1/pp3ppp/2n1pn2/2pp4/2PP4/P1PBPN2/5PPP/R1BQ1RK1 b - - 0 9 ; E58 Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line
r1bq1rk1/pp3ppp/2n1pn2/2p5/2BP4/P1P1PN2/5PPP/R1BQ1RK1 b - - 0 10 ; E59 Nimzo-Indian Defense: Normal Variation, Bernstein Defense
r1b2rk1/ppq2ppp/2n1pn2/2p5/2BP4/P1P1PN2/2Q2PPP/R1B2RK1 b - - 5 11 ; E59 Nimzo-Indian Defense: Normal Variation, Bernstein Defense