rnbqkb1r/pp3ppp/4pn2/2pp4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq - 0 5 ; D40 Queen's Gambit Declined: Semi-Tarrasch Defense
r1bqk2r/pp3ppp/2nbpn2/3p4/2PP4/P1N2N2/1P3PPP/R1BQKB1R w KQkq - 1 8 ; D40 Queen's Gambit Declined: Semi-Tarrasch Defense
r1b2rk1/pp2qppp/2n1pn2/2bp4/2P1P3/2NB1N2/PP2QPPP/R1B2RK1 b - - 0 10 ; D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation
rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq - 1 5 ; D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation
r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 5 8 ; D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation
r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQkq - 2 6 ; D40 Queen's Gambit Declined: Semi-Tarrasch Defense, with e3
r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq - 0 6 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense
rnbqkb1r/pp3ppp/4pn2/2pP4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq - 0 5 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense
rnbqkb1r/pp3ppp/4p3/2pn4/3P4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq - 0 6 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense
r1bqkb1r/pp3ppp/2n1p3/2pn4/3P4/2N2NP1/PP2PPBP/R1BQK2R b KQkq - 2 7 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense
rnbQkb1r/pp3ppp/5n2/8/4p3/2N2N2/PP3PPP/R1B1KB1R b KQkq - 0 8 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Endgame Variation
rnbqkb1r/pp3ppp/4p3/2pn4/3PP3/2N2N2/PP3PPP/R1BQKB1R b KQkq - 0 6 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation
rnbqkb1r/pp3ppp/4p3/2p5/3PP3/2P2N2/P4PPP/R1BQKB1R b KQkq - 0 7 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation
rnbq1rk1/pp3ppp/4p3/1B6/3PP3/5N2/P2Q1PPP/R3K2R b KQ - 2 11 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation
rnbqkb1r/pp3ppp/4p3/2pn4/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq - 0 6 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation
rnb1k2r/pp3ppp/4p3/q7/1b1PP3/5N2/P2B1PPP/R2QKB1R w KQkq - 3 10 ; D41 Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation
r1bqkb1r/pp3ppp/2n1p3/2pn4/3P4/2NBPN2/PP3PPP/R1BQK2R b KQkq - 2 7 ; D42 Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line
rnbqkb1r/1p3ppp/p4n2/1N1pp1B1/Q1P5/2N5/PP2PPPP/R3KB1R b KQkq - 1 8 ; D50 Queen's Gambit Declined: Semi-Tarrasch Defense, Krause Variation