ECO D31
21 named openings and variations are classified as D31. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Queen's Gambit Declined: Alapin VariationD311. d4 e6 2. c4 b6 3. Nc3 d5
- Queen's Gambit Declined: Charousek VariationD311. d4 d5 2. c4 e6 3. Nc3 Be7
- Queen's Gambit Declined: Charousek Variation, Miladinovic GambitD311. d4 d5 2. c4 e6 3. Nc3 Be7 4. e4 dxe4 5. f3
- Queen's Gambit Declined: Janowski VariationD311. d4 d5 2. c4 e6 3. Nc3 a6
- Queen's Gambit Declined: Queen's Knight VariationD311. d4 d5 2. c4 e6 3. Nc3
- Queen's Gambit Declined: Semi-Slav, Abrahams VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5
- Queen's Gambit Declined: Semi-Slav, Junge VariationD311. d4 d5 2. c4 e6 3. Nf3 c6 4. Nc3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qb6
- Queen's Gambit Declined: Semi-Slav, Koomen VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. e3 b5 6. a4 Bb4 7. Bd2 Qe7
- Semi-Slav Defense: Accelerated Move OrderD311. d4 d5 2. c4 e6 3. Nc3 c6
- Semi-Slav Defense: Anti-Noteboom, Stonewall VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 f5
- Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch GambitD311. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 f5 5. g4
- Semi-Slav Defense: Gunderam GambitD311. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3
- Semi-Slav Defense: Marshall GambitD311. d4 d5 2. c4 e6 3. Nc3 c6 4. e4
- Semi-Slav Defense: Marshall Gambit, Forgotten VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Nc3
- Semi-Slav Defense: Marshall Gambit, Main LineD311. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2
- Semi-Slav Defense: Marshall Gambit, Tolush VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 Qxd4 7. Bxb4 Qxe4+ 8. Be2 c5 9. Bxc5 Qxg2
- Semi-Slav Defense: Noteboom VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4
- Semi-Slav Defense: Noteboom Variation, Abrahams VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 Bxc3+ 7. bxc3 b5 8. axb5 cxb5
- Semi-Slav Defense: Noteboom Variation, Anti-Noteboom GambitD311. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. g3
- Semi-Slav Defense: Noteboom Variation, Anti-Noteboom VariationD311. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5
- Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation, Belyavsky LineD311. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5 f6