NIC key
The term NIC key (also NIC key or NIC code) describes a system for the systematization of openings in the game of chess . It is used by New In Chess magazine . In contrast to the ECO key , which is based on the publication of games in the five volumes of the Encyclopedia of Chess Openings and uses the abstract keys A00 to E99, the NIC key is based on the English names of the openings with regard to its main groups.
A NIC key consists of one of the 30 master keys consisting of two letters and a one to two-digit number. Further subgroups are then separated from one another by periods.
Overview of the main groups
The 30 main groups do not exactly correspond to the German-language names of the chess openings, so the runner games (1. e4 e5 2. Bc4) are encoded together with the Italian game under IG. The following table can also be sorted by the ECO key so that correspondences are more easily visible.
| NIC | English name | Opening moves | Surname | ECO | |
|---|---|---|---|---|---|
| AL | Alekhine's Defense | AL1-AL16 | 1. e4 Nf6 | Alekhine Defense | B02-B05 |
| BI | Benoni | BI1-BI28 | 1. d4 Nf6 2. c4 c5 3. d5 | Benoni Defense | A56-A79 |
| CA | Catalan Opening | CA1-CA5 | 1. d4 Nf6 2. c4 e6 3. g3 | Catalan opening | E00-E09 |
| CK | Caro-Kann Defense | CK1-CK12 | 1. e4 c6 | Caro-Kann Defense | B10-B19 |
| EO | English Opening | EO1-EO65 | 1. c4 | English opening | A10-A39 |
| FR | French Defense | FR1-FR23 | 1. e4 e6 | French defense | C00-C19 |
| GI | Grunfeld Indian | GI1-GI14 | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | Grünfeld-Indian Defense | D70-D99 |
| HD | Dutch (Holland) Defense | HD1-HD14 | 1. d4 f5 | Dutch defense | A80-A99 |
| IG | Italian Game | IG1-IG3, IG5 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 | Italian game | C50-C59 |
| IG4 | 1. e4 e5 2. Bc4 | Runner games | C23-C24 | ||
| Theatrical Version | King's Fianchetto | KF1-KF16 | 1. e4 g6 | Modern defense | B06 |
| KG | King's Gambit | KG1-KG5 | 1. e4 e5 2. f4 | King's Gambit | C30-C39 |
| AI | King's Indian | KI1-KI81 | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 | King's Indian defenses | E70-E99 |
| KP | King's Pawn Openings | KP1 – KP15 | 1. e4 e5 | Rare Open Games | C20-C22 |
| NI | Nimzo Indian | NI1-NI30 | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | Nimzowitsch Indian | E20-E59 |
| OI | Old Indian / Benoni Wall | OI1-OI16 | 1. d4 Nf6 2. c4 d6 | Ancient Indian Defense | A53-A55 |
| PU | Pirc Defense | PU1-PU16 | 1. e4 d6 | Pirc Ufimzew Defense | B07-B09 |
| QG | Queen's Gambit Acc. | QG1-QG16 | 1. d4 d5 2. c4 dxc4 | Queen's Gambit accepted | D20-D29 |
| QI | Queen's Indian | QI1-QI16 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 | Ladies Indian Defense | E12-E19 |
| QO | Queen's Gambit | QO1-QO16 | 1. d4 d5 2. c4 e6 3. Nc3 Be7 | Queen's Gambit declined | D31 |
| QP | Queen's Pawn Openings | QP1-QP8 | 1. d4 Nf6 | Queen's pawn games | A45-A52 |
| QP9-QP12 | 1. d4 d5 | Queen's pawn games | D00-D09 | ||
| QP13-QP14 | 1. d4 | Queen's pawn games | A40-A44 | ||
| RE | Reti Opening | RE1-RE27 | 1.Nf3 (d5 2. c4) | Réti opening | A09 |
| RG | Russian Game Petroff | RG1-RG8 | 1. e4 e5 2. Nf3 Nf6 | Russian defense | C42-C43 |
| RL | Ruy Lopez-Spanish | RL1-RL30 | 1. e4 e5 2. Nf3 Nc6 3. Bb5 | Spanish game | C60-C99 |
| SD | Scandinavian Defense | SD1-SD16 | 1. e4 d5 | Scandinavian defense | B01 |
| SI | Sicilian Defense | SI1-SI50 | 1. e4 c5 | Sicilian Defense | B20-B99 |
| SL | Slav Defense | SL1-SL11 | 1. d4 d5 2. c4 c6 | Queen's Gambit ( Slav Defense ) | D10-D19 |
| SO | Scotch opening | SO1-SO6 | 1. e4 e5 2. Nf3 Nc6 3. d4 | Scottish game | C44-C45 |
| TD | Tarrasch Defense | TD1-TD5 | 1. d4 d5 2. c4 e6 (3. Nc3 c5) | Tarrasch Defense | D32-D35 |
| VG | Vienna Game | VG1-VG4 | 1. e4 e5 2. Nc3 | Viennese game | C25-C29 |
| VO | Various openings | VO1-VO6 | 1. e4 | Rare semi-open games | B00 |
| VO7-VO24 | 1. * | Rare Closed Games | A00-A08 |
Complete overview of the openings
| NIC | Opening moves | Name and variants |
|---|---|---|
| AL: Alekhine defense (1. e4 Nf6) | ||
| AL1 | 2. d3 2. Bc4 |
|
| AL2 | 2. Nc3 | |
| AL3 | 2. e5 Nd5 | |
| AL4 | 2. e5 Nd5 3. Nc3 | |
| AL5 | 2. e5 Nd5 3. c4 | |
| AL6 | 2. e5 Nd5 3. d4 d6 | |
| AL7 | 2. e5 Nd5 3. d4 d6 4. c4 Nb6 | |
| AL8 | 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 | |
| AL9 | 2. e5 Nd5 3. d4 d6 4. Nf3 | |
| AL10 | 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5 | |
| AL11 | 2. e5 Nd5 3. d4 d6 4. Nf3 g6 | |
| AL12 | 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 | |
| AL13 | 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6 | |
| AL14 | 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6 6. Ng5 | |
| AL15 | 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 | |
| AL16 | 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. 0–0 Be7 7. c4 Nb6 | |
| BI: Benoni defense (1. d4 Nf6 2. c4 c5 3. d5) | ||
| BI1 | 3. * | |
| BI2 | 3.… e6 | |
| BI3 | 3.… e6 4. Nf3 | |
| BI4 | 3.… e6 4. Nc3 | |
| BI5 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. e4 | |
| BI6 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f3 | |
| BI7 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 | Four pawns |
| BI8 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 [6. … G6] | |
| BI9 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 | |
| BI10 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Bg5 | |
| BI11 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2 | |
| BI12 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Bf4 | |
| BI13 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 [7. … Bg7] | |
| BI14 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 [8. … 0–0 9. 0–0] | |
| BI15 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 0–0 9. 0–0 Bg4 | |
| BI16 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 0–0 9. 0–0 a6 | |
| BI17 | 3.… e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 0–0 9. 0–0 Re8 | |
| BI18 | 3.… b5 | Volga / Benko |
| BI19 | 3.… b5 4. Nf3 | |
| BI20 | 3.… b5 4. cxb5 | |
| BI21 | 3.… b5 4. cxb5 a6 5. e3 | |
| BI22 | 3.… b5 4. cxb5 a6 5. Nc3 | |
| BI23 | 3.… b5 4. cxb5 a6 5. b6 | |
| BI24 | 3.… b5 4. cxb5 a6 5. f3 | |
| BI25 | 3.… b5 4. cxb5 a6 5. bxa6 | |
| BI26 | 3.… b5 4. cxb5 a6 5. bxa6 Ba6 | |
| BI27 | 3.… b5 4. cxb5 a6 5. bxa6 Ba6 6. Nc3 | |
| BI28 | 3.… b5 4. cxb5 a6 5. bxa6 Ba6 6. Nc3 g6 7. Nf3 | |
| CA: Catalan opening (1. d4 Nf6 2. c4 e6 3. g3) | ||
| CA1 | 3. * | |
| CA2 | 3.… d5 4. Bg2 dxc4 5. Qa4 | |
| CA3 | 3.… d5 4. Bg2 dxc4 5. Nf3 | |
| CA4 | 3.… d5 4. Bg2 Be7 5. Nf3 | |
| CA5 | 3.… d5 4. Bg2 Be7 5. Nf3 0–0 6. 0–0 dxc4 | |
| CK: Caro-Kann defense (1. e4 c6) | ||
| CK1 | 2. Nf3 2. Nc3 2. c4 2. d3 |
|
| CK2 | 2. d4 d5 | |
| CK3 | 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 | Panov |
| CK4 | 2. d4 d5 3. e5 [3. … Bf5] | Advance variation |
| CK5 | 2. d4 d5 3. Nc3 [3. … Dxe4 4. Ne4] | |
| CK6 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 Nf6 5. Nf6 exf6 | |
| CK7 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 Nf6 5. Nf6 gxf6 | |
| CK8 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 Nd7 | |
| CK9 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 Nd7 5. Bc4 | |
| CK10 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 Bf5 | |
| CK11 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 Bf5 5. Ng3 Bg6 6. h4 | |
| CK12 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bd3 10. Qd3 | |
| EO: English opening (1. c4) | ||
| EO1 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 | |
| EO2 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Nd5 | |
| EO3 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nd5 | |
| EO4 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 | |
| EO5 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 | |
| EO6 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 | |
| EO7 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 | |
| EO8 | 1.… e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 | |
| EO9 | 1.… e5 2. Nc3 Nf6 3. Nf3 e4 | Bellon Gambit |
| EO10 | 1.… e5 2. Nc3 Nf6 | |
| EO11 | 1.… e5 2. Nc3 Nf6 3. g3 Bb4 | Smyslov |
| EO12 | 1.… e5 2. Nc3 Nf6 3. g3 c6 | Keres |
| EO13 | 1.… e5 2. Nc3 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 | |
| EO14 | 1.… e5 2. Nc3 Nf6 3. g3 g6 4. Bg2 Bg7 | |
| EO15 | 1.… e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 | |
| EO16 | 1.… e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Rb1 | |
| EO17 | 1.… e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 | |
| EO18 | 1.… e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 | |
| EO19 | 1.… e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 | |
| EO20 | 1.… e5 2. Nc3 Nc6 3. g3 | |
| EO21 | 1.… e5 2. Nc3 Nc6 3. Nf3 | |
| EO22 | 1.… e5 2. Nc3 d6 | |
| EO23 | 1.… e5 2. Nc3 | |
| EO24 | 1.… e5 2. g3 | |
| EO25 | 1.… e5 | |
| EO26 | 1.… c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 [. ...] 8. Nd4 | |
| EO27 | 1.… c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. 0–0 0–0 | |
| EO28 | 1.… c5 2. Nc3 Nc6 3. g3 [3. … G6 4. Bg2 Bg7 5. Nf3] | |
| EO29 | 1.… c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 | |
| EO30 | 1.… c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 | |
| EO31 | 1.… c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 | |
| EO32 | 1.… c5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 cxd4 5. Nd4 e6 6. g3 | |
| EO33 | 1.… c5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 cxd4 5. Nd4 e6 | |
| EO34 | 1.… c5 2. Nc3 Nc6 3. Nf3 g6 4. e3 | |
| EO35 | 1.… c5 2. Nc3 Nc6 3. Nf3 g6 4. d4 cxd4 5. Nd4 Bg7 | |
| EO36 | 1.… c5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nd5 5. Bg2 Nc7 | |
| EO37 | 1.… c5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nd5 5. Bg2 | |
| EO38 | 1.… c5 2. Nc3 | |
| EO39 | 1.… c5 2. Nc3 Nf6 3. g3 e6 4. Nf3 b6 | |
| EO40 | 1.… c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 | |
| EO41 | 1.… c5 2. Nf3 Nf6 3. g3 e6 4. Nc3 Nc6 5. Bg2 Be7 6. 0–0 d5 | |
| EO42 | 1.… c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nd5 | |
| EO43 | 1.… c5 2. Nf3 Nf6 3. Nc3 b6 4. e4 | |
| EO44 | 1.… c5 2. Nf3 Nf6 3. d4 cxd4 4. Nd4 e6 5. Nc3 Bb4 | |
| EO45 | 1.… c5 2. Nf3 Nf6 3. d4 cxd4 4. Nd4 e6 5. g3 | |
| EO46 | 1.… c5 2. Nf3 Nf6 3. d4 cxd4 4. Nd4 | |
| EO47 | 1.… c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. 0–0 g6 6. b3 Bg7 | |
| EO48 | 1.… c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. 0–0 g6 6. Nc3 Bg7 | |
| EO49 | 1.… c5 | |
| EO50 | 1.… c5 2. Nf3 Nc6 3. d4 cxd4 4. Nd4 e6 | |
| EO51 | 1.… Nf6 2. Nc3 d5 3. cxd5 Nd5 4. Nf3 g6 5. g3 | |
| EO52 | 1.… Nf6 2. Nc3 d5 3. cxd5 Nd5 | |
| EO53 | 1.… Nf6 2. Nc3 d5 3. cxd5 Nd5 4. g3 | |
| EO54 | 1.… Nf6 2. Nc3 e6 3. e4 c5 | |
| EO55 | 1.… Nf6 2. Nc3 e6 3. e4 c5 4. e5 Ng8 5. d4 [5. … Cxd4 6. Qd4 Nc6 7. Qe4] | |
| EO56 | 1.… Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 | |
| EO57 | 1.… Nf6 2. Nc3 e6 3. e4 d5 | Flohr / Mikenas |
| EO58 | 1.… Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qc2 | |
| EO59 | 1.… Nf6 2. Nc3 e6 3. Nf3 Bb4 | Nimzowitsch |
| EO60 | 1.… Nf6 2. Nc3 e6 3. Nf3 b6 4. e4 Bb7 | |
| EO61 | 1.… Nf6 2. Nc3 | |
| EO62 | 1.… g6 2. e4 e5 | |
| EO63 | 1.… b6 | |
| EO64 | 1.… Nf6 | |
| EO65 | 1. c4 | |
| FR: French Defense (1. e4 e6) | ||
| FR1 | 2. De2 2. Nf3 2. b3 |
[Chigorin / Exchange] |
| FR2 | 2. d3 | Closed variation |
| FR3 | 2. d4 d5 3. e5 | Advance variation |
| FR4 | 2. d4 d5 3. Nc3 | |
| FR5 | 2. d4 d5 3. Nc3 Nf6 4. Bg5 | |
| FR6 | 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 | Classical |
| FR7 | 2. d4 d5 3. Nc3 dxe4 4. Ne4 | Rubinstein |
| FR8 | 2. d4 d5 3. Nc3 Bb4 | Winawer |
| FR9 | 2. d4 d5 3. Nc3 Bb4 4. e5 | Winawer |
| FR10 | 2. d4 d5 3. Nc3 Bb4 4. e5 c5 | Winawer |
| FR11 | 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bc3 6. bxc3 | Winawer |
| FR12 | 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bc3 6. bxc3 Ne7 7. Nf3 | Winawer |
| FR13 | 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bc3 6. bxc3 Ne7 7.Nf3 Nbc6 | Winawer |
| FR14 | 2. d4 d5 3. Nd2 | Tarrash |
| FR15 | 2. d4 d5 3. Nd2 Nc6 | Tarrash |
| FR16 | 2. d4 d5 3. Nd2 Nf6 4. e5 | Tarrash |
| FR17 | 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. c3 c5 6. Bd3 | Tarrash |
| FR18 | 2. d4 d5 3. Nd2 c5 | Tarrash |
| FR19 | 2. d4 d5 3. Nd2 c5 4. exd5 Qd5 | Tarrash |
| FR20 | 2. d4 d5 3. Nd2 c5 4. exd5 exd5 | Tarrash |
| FR21 | 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 | Tarrash |
| FR22 | 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 | Tarrash |
| FR23 | 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 6. Bb5 Bd6 7. 0-0 Ne7 8. dxc5 Bc5 9. Nb3 Bd6 | |
| GI: Grünfeld-Indian Defense (1. d4 Nf6 2. c4 g6 3. Nc3 d5) | ||
| GI1 | 1. d4 Nf6 2. c4 g6 (and 3.… d5) | |
| GI2 | 3. g3 Bg7 4. Bg2 d5 | |
| GI3 | 3. Nc3 d5 | |
| GI4 | 3. Nc3 d5 4. cxd5 Nd5 5. e4 Nc3 6. bxc3 | Exchange |
| GI5 | 3. Nc3 d5 4. cxd5 Nd5 5. e4 Nc3 6. bxc3 Bg7 7. Bc4 [7. … 0–0 8. Ne2 c5] | Exchange |
| GI6 | 3. Nc3 d5 4. cxd5 Nd5 5. e4 Nc3 6. bxc3 Bg7 7. Bc4 0-0 8. Ne2 c5 9. 0-0 Nc6 10. Be3 cxd4 11. cxd4 | Exchange |
| GI7 | 3. Nc3 d5 4. Nf3 Bg7 | |
| GI8 | 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 | |
| GI9 | 3. Nc3 d5 4. Nf3 Bg7 5. e3 0–0 | |
| GI10 | 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 [5. … Dxc4 6. Qc4 0–0] | Russian |
| GI11 | 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qc4 0-0 7. e4 Bg4 8. Be3 Nfd7 | Smyslov |
| HD: Dutch Defense (1. d4 f5) | ||
| HD1 | 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 0–0 6. 0–0 d6 | |
| HD2 | 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 0–0 6. 0–0 | |
| HD3 | 2. c4 Nf6 3. g3 e6 4. Bg2 | |
| HD4 | 2. c4 Nf6 3. g3 d6 4. Bg2 c6 | Hort / Antoshin |
| HD5 | 2. c4 Nf6 3. Nc3 | |
| HD6 | 3. g3 g6 4. Bg2 Bg7 5. Nf3 0–0 6. 0–0 d6 | |
| HD7 | 3. g3 g6 4. Bg2 Bg7 | Leningrad |
| HD8 | 2. Nf3 Nf6 3. g3 g6 | Leningrad |
| HD9 | 2. g3 g6 3. Bg2 | Leningrad |
| HD10 | 2. c4 | |
| HD11 | 2. e4 | Staunton gambit |
| HD12 | 2. * | |
| HD13 | 1. Nf3 f5 | |
| HD14 | 1. c4 f5 | |
| IG: Italian game (1. e4 e5 2. Nf3 Nc6 3. Bc4) | ||
| IG1 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| IG2 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| IG3 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 | |
| IG4 | 1. e4 e5 2. Bc4 | Bishop's Opening |
| IG5 | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 | Evans |
| KF: Modern Defense (1. e4 g6) | ||
| KF1 | 2. f4 2. h4 2. Nc3 |
|
| KF2 | 2. d4 | |
| KF3 | 2. d4 Bg7 | |
| KF4 | 2. d4 Bg7 3. c4 | |
| KF5 | 2. d4 Bg7 3. c3 | |
| KF6 | 2. d4 Bg7 3. c3 d6 | |
| KF7 | 2. d4 Bg7 3. Nf3 | |
| KF8 | 2. d4 Bg7 3. Nf3 c5 | |
| KF9 | 2. d4 Bg7 3. Nf3 d6 | |
| KF10 | 2. d4 Bg7 3. Nc3 | |
| KF11 | 2. d4 Bg7 3. Nc3 c6 | |
| KF12 | 2. d4 Bg7 3. Nc3 d6 | |
| KF13 | 2. d4 Bg7 3. Nc3 d6 4. Be3 | |
| KF14 | 2. d4 Bg7 3. Nc3 d6 4. f4 | |
| KF15 | 2. d4 Bg7 3. Nc3 d6 4. Nf3 | |
| KF16 | 2. d4 Bg7 3. Nc3 d6 4. Nf3 c6 | |
| KG: King's Gambit (1. e4 e5 2. f4) | ||
| KG1 | 1. e4 e5 2. f4 exf4 3. Nf3 g5 | Classical |
| KG2 | 1. e4 e5 2. f4 exf4 3. Nf3 | |
| KG3 | 1. e4 e5 2. f4 exf4 | |
| KG4 | 1. e4 e5 2. f4 d5 | Falconberry |
| KG5 | 1. e4 e5 2. f4 | |
| KI: King's Indian defenses (3.Nc3 Bg7 4. e4 d6) | ||
| KI1 | 5. Nf3 0–0 6. Be2 e5 7. 0–0 Nc6 8. d5 Ne7 9. Ne1 Nd7 | |
| KI2 | 9. Ne1 Nd7 10. f3 f5 | Classical main line |
| KI3 | 9. Ne1 9. Bg5 9. Kh1 |
Classical main line |
| KI4 | 9. b4 Nh5 | Bayonet attack |
| KI5 | 9. b4 | Bayonet attack |
| KI6 | 9. Bd2 | Taimanov variety |
| KI7 | 9. Nd2 | |
| KI8 | 5. Nf3 0–0 6. Be2 e5 7. 0–0 Nc6 8. Be3 | |
| KI9 | 7.… Nbd7 8. Re1 c6 9. Bf1 a5 | Old Main Line |
| KI10 | 7.… Nbd7 8. Re1 c6 9. Bf1 | Old Main Line |
| KI11 | 7.… Nbd7 8. Re1 | Old Main Line |
| KI12 | 7.… Nbd7 8. d5 | Old Main Line |
| KI13 | 7.… Nbd7 8. Be3 | Old Main Line |
| KI14 | 7.… Nbd7 | Old Main Line |
| KI15 | 5. Nf3 0-0 6. Be2 e5 7. 0-0 | |
| KI16 | 6. Be2 e5 7. d5 Nbd7 | Petrosian variation |
| KI17 | 6. Be2 e5 7. d5 | Petrosian variation |
| KI18 | 6. Be2 e5 | |
| KI19 | 6. Be2 | |
| KI20 | 6. h3 | |
| KI21 | 5. Nf3 0-0 | |
| KI22 | 5. Nf3 | |
| KI23 | 5. Be2 0-0 6. Bg5 c5 7. d5 h6 | Averbakh |
| KI24 | 6. Bg5 c5 7. d5 e6 | Averbakh |
| KI25 | 6. Bg5 c5 | Averbakh |
| KI26 | 6. Bg5 | Averbakh |
| KI27 | 5. Be2 | Averbakh |
| KI28 | 5. g3 0–0 6. Bg2 e5 7. Nge2 | |
| KI29 | 5. g3 [5. … 0–0 6. Bg2] | |
| KI30 | 5th h3 | Makogonov variation |
| KI31 | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 | |
| KI32 | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0–0 | |
| KI33 | 4.… d6 5. f3 0–0 6. Be3 Nc6 7. Nge2 | Sami |
| KI34 | 6.… Nc6 7. Nge2 a6 8. Qd2 Rb8 9. Nc1 | Sami |
| KI35 | 6.… Nc6 7. Nge2 a6 8. Qd2 Rb8 | Sami |
| KI36 | 6.… Nc6 | Sami |
| KI37 | 6.… e5 7. d5 c6 8. Bd3 cxd5 9. cxd5 | Sami |
| KI38 | 6.… e5 7. d5 c6 8. Bd3 b5 | Sami |
| KI39 | 6.… e5 7. d5 c6 8. Qd2 cxd5 9. cxd5 | Sami |
| KI40 | 6.… e5 7. d5 Nh5 8. Qd2 | Sami |
| KI41 | 6.… e5 7. d5 | Sami |
| KI42 | 6.… e5 7. Nge2 c6 8. Qd2 Nbd7 | Sami |
| KI43 | 6.… e5 | Sami |
| KI44 | 6.… b6 7. Bd3 a6 8. Nge2 c5 9. e5 | Sami |
| KI45 | 6.… b6 | Sami |
| KI46 | 6.… c6 | Sami |
| KI47 | 6.… a6 | Sami |
| KI48 | 5. f3 0-0 6. Be3 | Sami |
| KI49 | 5. f3 0–0 6. Bg5 c5 7. d5 e6 8. Qd2 | Sami |
| KI50 | 6. Bg5 c5 7. d5 | Sami |
| KI51 | 6. Bg5 | Sami |
| KI52 | 6. Nge2 | Sami |
| KI53 | 5. f3 a6 | Sami |
| KI54 | 5. f3 | Sami |
| KI55 | 5. f4 [5. … 0–0 6. Nf3 c5 7. d5] | Four pawns |
| KI56 | 7. d5 e6 8. Be2 exd5 9. e5 | Four pawns |
| KI57 | 7. d5 e6 8. Be2 | Four pawns |
| KI58 | 7. d5 e6 8. dxe6 | Four pawns |
| KI59 | 5. f4 0-0 6. Nf3 c5 | Four pawns |
| KI60 | 5. f4 c5 | Four pawns |
| KI61 | [g3] 6.… Nbd7 7. 0–0 e5 8. e4 c6 9. h3 Re8 | |
| KI62 | 6.… Nbd7 7. 0–0 e5 8. e4 c6 9. h3 | |
| KI63 | 6.… Nbd7 7. 0–0 e5 8. e4 c6 | |
| KI64 | 6.… Nbd7 7. 0–0 e5 8. e4 | |
| KI65 | 6.… Nbd7 [7. 0–0 e5] | |
| KI66 | 6.… c5 7. 0–0 Nc6 8. d5 Sa5 9. Nd2 a6 | Yugoslav |
| KI67 | 6.… c5 7. 0–0 Nc6 8. d5 Sa5 | Yugoslav |
| KI68 | 6.… c5 7. 0–0 Nc6 8. dxc5 dxc5 | Yugoslav |
| KI69 | 6.… c5 | Yugoslav |
| KI70 | 6.… Nc6 7. 0–0 a6 8. h3 | Panno |
| KI71 | 6.… Nc6 7. 0–0 a6 | Panno |
| KI72 | 6.… Nc6 7. 0–0 | Panno |
| KI73 | 6.… Nc6 | Panno |
| KI74 | 6.… c6 7. 0–0 Da5 | Kavalek |
| KI75 | 6.… c6 7. 0–0 | |
| KI76 | 3. g3 Bg7 4. Nc3 | |
| KI77 | 3. g3 Bg7 4. Nf3 | |
| KI78 | 3. g3 | |
| KI79 | 3. Nc3 Bg7 4. Nf3 0-0 5. Bg5 | |
| KI80 | 3. Nc3 Bg7 [4. Nf3] | |
| KI81 | 3. * | |
| KP: Open games (1. e4 e5) | ||
| KP1 | 2. * | |
| KP2 | 2. d4 | Center Gambit |
| KP3 | 2. Nf3 d6 | Philidor |
| KP4 | 2. Nf3 d6 3. d4 Nf6 | Philidor |
| KP5 | 2. Nf3 f5 | Latvian |
| KP6 | 2. Nf3 f5 3. Ne5 | Latvian |
| KP7 | 2. Nf3 Nc6 | |
| KP8 | 2. Nf3 Nc6 3. c3 | Ponziani |
| KP9 | 2. Nf3 Nc6 3. Nc3 | Three Knights |
| KP10 | 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 | Four Knights |
| KP11 | 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 | Rubinstein |
| KP12 | 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 | Two Knights |
| KP13 | 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 | Two Knights |
| KP14 | 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. 0-0 | Max Lange |
| KP15 | 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. 0-0 Ne4 6. Re1 d5 7. Bd5 Qd5 8. Nc3 Da5 | |
| NI: Nimzowitsch-Indian (1. d4 Nf6 2. c4 e6 3. Nc3 Bb4) | ||
| NI1 | 4. e3 0–0 5. Bd3 d5 6. Nf3 c5 7. 0–0 Nc6 8. a3 Bc3 | |
| NI2 | 7.… Nc6 | |
| NI3 | 7.… dxc4 8. Bc4 Nbd7 | |
| NI4 | 7.… dxc4 8. Bc4 cxd4 9. exd4 b6 | Karpov |
| NI5 | 4. e3 0–0 5. Bd3 d5 6. Nf3 c5 7. 0–0 | |
| NI6 | 5.… d5 6. Nf3 | |
| NI7 | 5.… c5 6. Nf3 | |
| NI8 | 5.… d5 6. a3 | |
| NI9 | 5.… c5 6. Ne2 d5 | |
| NI10 | 4. e3 0–0 5. Ne2 | |
| NI11 | 4. e3 0–0 | |
| NI12 | 4. e3 b6 | |
| NI13 | 4. e3 b6 5. Ne2 | Bronstein |
| NI14 | 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bc3 7. bxc3 d6 | Hubner |
| NI15 | 4. e3 c5 | |
| NI16 | 4. e3 c5 5. Ne2 | |
| NI17 | 4. e3 | Rubinstein |
| NI18 | 4. a3 Bc3 5. bxc3 | Sami |
| NI19 | 4. a3 Bc3 5. bxc3 c5 | Sami |
| NI20 | 4. Dc2 0-0 5. a3 Bc3 6. Dc3 | Classical |
| NI21 | 4. Qc2 c5 5. dxc5 0-0 | Classical |
| NI22 | 4. Qc2 c5 | Classical |
| NI23 | 4. Qc2 d5 | Classical |
| NI24 | 4. Qc2 | Classical |
| NI25 | 4. Bg5 | Leningrad |
| NI26 | 4. Nf3 b6 | |
| NI27 | 4. Nf3 d5 | Ragozin |
| NI28 | 4. Nf3 | |
| NI29 | 4. g3 | Romanishin |
| NI30 | 4. * | |
| OI: Old Indian Defense (1. d4 Nf6 2. c4 d6) | ||
| OI1 | 1. d4 Nf6 2. c4 d6 | |
| OI2 | 1. d4 Nf6 2. c4 d6 3. Nc3 | |
| OI3 | 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 | |
| OI4 | 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. Bg5 | |
| OI5 | 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. g3 | |
| OI6 | 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. e4 | |
| OI7 | 1. d4 d6 2. c4 | |
| OI8 | 1. d4 c5 2. d5 | |
| OI9 | 1. d4 c5 2. d5 e5 | |
| OI10 | 1. d4 Nf6 2. c4 c5 | |
| OI11 | 1. d4 Nf6 2. c4 c5 3. d5 e5 | |
| OI12 | 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 | |
| OI13 | 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 | |
| OI14 | 1. d4 Nf6 2. Nf3 c5 3. d5 | |
| OI15 | 1. d4 Nf6 2. Nf3 c5 3. d5 b5 | |
| OI16 | 1. d4 Nf6 2. Nf3 c5 3. d5 g6 | |
| PU: Pirc Ufimzew Defense (1. e4 d6) | ||
| PU1 | 2. Nc3 2. f4 2. g3 |
|
| PU2 | 2. d4 [2. … Nf6] | |
| PU3 | 2. d4 Nf6 3. f3 | |
| PU4 | 2. d4 Nf6 3. Bd3 | |
| PU5 | 2. d4 Nf6 3. Nc3 | |
| PU6 | 2. d4 Nf6 3. Nc3 g6 | |
| PU7 | 2. d4 Nf6 3. Nc3 g6 4. Be2 | |
| PU8 | 2. d4 Nf6 3. Nc3 g6 4. g3 | |
| PU9 | 2. d4 Nf6 3. Nc3 g6 4. Be3 | |
| PU10 | 2. d4 Nf6 3. Nc3 g6 4. Bg5 | |
| PU11 | 2. d4 Nf6 3. Nc3 g6 4. f4 [4. … Bg7] | |
| PU12 | 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 | |
| PU13 | 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 6. Bd3 | |
| PU14 | 2. d4 Nf6 3. Nc3 g6 4. Nf3 [4. … Bg7] | |
| PU15 | 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Bc4 | |
| PU16 | 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 | |
| QG: Queen's Gambit accepted (1. d4 d5 2. c4 dxc4) | ||
| QG1 | 3. * | |
| QG2 | 3. Nc3 | |
| QG3 | 3. e4 | Central variation |
| QG4 | 3. e4 e5 | Central variation |
| QG5 | 3. Nf3 [3. … Nf6] | Alekhine / Mannheim |
| QG6 | 3. Nf3 Nf6 4. Nc3 | Two Knights variation |
| QG7 | 3. Nf3 Nf6 4. e3 | Smyslov / Matulovic |
| QG8 | 3. Nf3 Nf6 4. e3 e6 | |
| QG9 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 | Furman variation |
| QG10 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. 0–0 Nc6 | |
| QG11 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. 0–0 a6 | Classical variation |
| QG12 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. 0–0 a6 7. dxc5 | Classical variation |
| QG13 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. 0–0 a6 7. a4 | Classical variation |
| QG14 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. 0–0 a6 7. Bd3 | Classical variation |
| QG15 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. 0–0 a6 7. De2 | Classical variation |
| QG16 | 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. 0–0 a6 7. De2 b5 8. Bb3 | Classical variation |
| QI: Queen's Indian Defense (1. d4 Nf6 2. c4 e6 3. Nf3 b6) | ||
| QI1 | 1. d4 Nf6 2. c4 e6 3. Nf3 | Bogo Indian |
| QI2 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 | |
| QI3 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 | |
| QI4 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 | Petrosian |
| QI5 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Ba6 | |
| QI6 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 [4. … Bb7 5. Bg2] | |
| QI7 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 | |
| QI8 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0–0 0–0 7. d5 exd5 | |
| QI9 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0–0 0–0 7. Nc3 | |
| QI10 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0–0 0–0 7. Nc3 Ne4 | |
| QI11 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0–0 0–0 7. Nc3 Ne4 8. Qc2 | |
| QI12 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0–0 0–0 7. Nc3 Ne4 8. Dc2 Nc3 9. Qc3 f5 | |
| QI13 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. Sc3 Ne4 8. Dc2 Sc3 9. Qc3 c5 | |
| QI14 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 | Nimzowitsch |
| QI15 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 | |
| QI16 | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4 [6. Bd2 Be7] | |
| QO: Rejected Queen's Gambit (1. d4 d5 2. c4 e6 3. Nc3 Be7 ) | ||
| QO1 | 3.… Be7 4. Nf3 [4. Bf4] Nf6 5. Bf4 | |
| QO2 | 3.… Be7 4. Nf3 Nf6 5. Bf4 0–0 6. e3 c5 | |
| QO3 | 3.… Be7 4. Nf3 Nf6 5. Bf4 0–0 6. e3 c5 7. dxc5 Bc5 8. cxd5 | |
| QO4 | 3.… Be7 4. Nf3 Nf6 5. Bf4 0–0 6. e3 c5 7. dxc5 Bc5 8. Qc2 | |
| QO5 | 3.… Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 0–0 | |
| QO6 | 3.… Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 0–0 7. Rc1 b6 | Tartakower |
| QO7 | 3.… Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 0–0 7. e3 b6 | Tartakower |
| QO8 | 3.… Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 0–0 7. e3 b6 8. Bf6 Bf6 9. cxd5 exd5 | Tartakower |
| QO9 | 3.… Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 0–0 7. e3 b6 8. Rc1 | Tartakower |
| QO10 | 3.… Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bf6 Bf6 | Anti tar |
| QO11 | 3.… Nf6 and cxd5 exd5 | Exchange |
| QO12 | 3.… Nf6 4. Bg5 [4. … Be7 5. Nf3 0–0 6. e3] | |
| QO13 | 3.… Nf6 4. Bg5 Be7 5. Nf3 0–0 6. e3 7. Rc1 | |
| QO14 | 3.… Nf6 4. Bg5 Be7 and Ne4 | Lasker |
| QO15 | 3.… Nf6 4. Bg5 Nbd7 | Cambridge Springs |
| QO16 | 3. Nc3 3. Nf3 3. Bf4 |
|
| QP: Queen's pawn game (1. d4) | ||
| QP1 | 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 | |
| QP2 | 1. d4 Nf6 2. Nf3 g6 3. Bg5 | |
| QP3 | 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 | |
| QP4 | 1. d4 Nf6 2. Nf3 e6 3. Bg5 | Torre |
| QP5 | 1. d4 Nf6 2. Nf3 e6 3. Bf4 | London |
| QP6 | 1. d4 Nf6 2. Nf3 | Colle |
| QP7 | 1. d4 Nf6 | |
| QP8 | 1. d4 Nf6 2. Bg5 Ne4 | Trompowsky |
| QP9 | 1. d4 d5 | |
| QP10 | 1. d4 d5 2. Nc3 | |
| QP11 | 1. d4 d5 2. Nc3 Nf6 3. Bg5 | Veresov / Richter |
| QP12 | 1. d4 d5 2. Nc3 Nf6 3. Bg5 Nbd7 | |
| QP13 | 1. d4 c6 | |
| QP14 | 1. d4 | |
| RE: Réti opening (1. Nf3 (1.… d5 2. c4)) | ||
| RE1 | 1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. g3 Bg4 | |
| RE2 | 1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. g3 Bf5 | |
| RE3 | 1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. g3 g6 | |
| RE4 | 1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. g3 | |
| RE5 | 1. Nf3 d5 2. c4 c6 3. g3 Nf6 4. Bg2 Bg4 | |
| RE6 | 1. Nf3 d5 2. c4 c6 3. g3 Nf6 4. Bg2 Bf5 | |
| RE7 | 1. Nf3 d5 2. c4 c6 | |
| RE8 | 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. 0–0 0–0 | |
| RE9 | 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. 0–0 0–0 6. b3 | |
| RE10 | 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 dxc4 | |
| RE11 | 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 | |
| RE12 | 1. Nf3 d5 2. c4 e6 | |
| RE13 | 1. Nf3 d5 2. c4 d4 | |
| RE14 | 1. Nf3 d5 2. c4 d4 3. g3 c5 | |
| RE15 | 1. Nf3 d5 2. c4 d4 3. g3 | |
| RE16 | 1. Nf3 d5 2. c4 d4 3. e3 | |
| RE17 | 1. Nf3 d5 2. c4 d4 3. b4 | |
| RE18 | 1. Nf3 d5 2. c4 dxc4 3. Sa3 | |
| RE19 | 1. Nf3 d5 2. c4 dxc4 | |
| RE20 | 1. Nf3 | |
| RE21 | 1. Nf3 c5 | |
| RE22 | 1. Nf3 d5 | |
| RE23 | 1. Nf3 d5 2. g3 Nf6 3. Bg2 g6 | |
| RE24 | 1. Nf3 d5 2. g3 Nf6 3. Bg2 c5 | |
| RE25 | 1. Nf3 d5 2. g3 Nf6 3. Bg2 Bf5 | |
| RE26 | 1. Nf3 d5 2. g3 Nf6 3. Bg2 Bg4 | |
| RE27 | 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 | |
| RG: Russian Defense (1. e4 e5 2. Nf3 Nf6) | ||
| RG1 | 3. d4 | Steinitz |
| RG2 | 3. d4 Ne4 | Steinitz |
| RG3 | 3. Ne5 | |
| RG4 | 3. Ne5 d6 4. Nf3 Ne4 5. d4 | |
| RG5 | 3. Ne5 d6 4. Nf3 Ne4 5. d4 d5 6. Bd3 Be7 | Jaenisch |
| RG6 | 3. Ne5 d6 4. Nf3 Ne4 5. d4 d5 6. Bd3 Be7 7. 0-0 Sc6 | Jaenisch |
| RG7 | 3. Nc3 | |
| RG8 | 3rd * (without 3rd Bc4, see IG04.8) | |
| RL: Spanish game (1. e4 e5 2. Nf3 Nc6 3. Bb5) | ||
| RL1 | 3.… Bb4 3.… Bc5 |
|
| RL2 | 3.… d6 | Steinitz |
| RL3 | 3.… g6 | Smyslov |
| RL4 | 3.… Nge7 | Cozio |
| RL5 | 3.… Nd4 | Bird |
| RL6 | 3.… f5 | Janish |
| RL7 | 3.… Nf6 | Berlin Defense |
| RL8 | 3.… a6 4. Bc6 | Exchange variation |
| RL9 | 3rd ... a6 4th Ba4 | |
| RL10 | 3.… a6 4. Ba4 d6 | Neo-Steinitz |
| RL11 | 3.… a6 4. Ba4 d6 5. c3 | Neo-Steinitz |
| RL12 | 3.… a6 4. Ba4 Nf6 | |
| RL13 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 | |
| RL14 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Bc6 | |
| RL15 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. d4 | |
| RL16 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 | |
| RL17 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 | Marshall |
| RL18 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 0–0 8. a4 | Anti-Marshall |
| RL19 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 | |
| RL20 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0–0 9. d4 | |
| RL21 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0–0 9. h3 | |
| RL22 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0–0 9. h3 h6 | Smyslov |
| RL23 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0–0 9. h3 Sa5 10. Bc2 | Chigorin |
| RL24 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0–0 9. h3 Sa5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 | Chigorin |
| RL25 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0–0 9. h3 Nb8 | Breyer |
| RL26 | 3.… a6 4. Ba4 Nf6 5. 0–0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0–0 9. h3 Bb7 | Zaitsev |
| RL27 | 3.… a6 4. Ba4 Nf6 5. 0–0 Ne4 | Open |
| RL28 | 3.… a6 4. Ba4 Nf6 5. 0–0 Ne4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. De2 | Keres |
| RL29 | 3.… a6 4. Ba4 Nf6 5. 0–0 Ne4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 | |
| RL30 | 3.… a6 4. Ba4 Nf6 5. 0–0 Ne4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 | |
| SD: Scandinavian Defense (1. e4 d5) | ||
| SD1 | 2. ... (without 2. Sc3, see VO12) | |
| SD2 | 2. exd5 Nf6 | |
| SD3 | 2. exd5 Nf6 3. Bb5 | |
| SD4 | 2. exd5 Nf6 3. c4 | |
| SD5 | 2. exd5 Nf6 3. d4 | |
| SD6 | 2. exd5 Nf6 3. d4 Nd5 | |
| SD7 | 2. exd5 Nf6 3. d4 Nd5 4. c4 | |
| SD8 | 2. exd5 Qd5 | |
| SD9 | 2. exd5 Qd5 3. Nc3 Qa5 | |
| SD10 | 2. exd5 Qd5 3. Nc3 Da5 4. Bc4 | |
| SD11 | 2. exd5 Qd5 3. Nc3 Da5 4. d4 | |
| SD12 | 2. exd5 Qd5 3. Nc3 Da5 4. Nf3 [4. … Nf6 5. d4] | |
| SD13 | 2. exd5 Qd5 3. Nc3 Da5 4. Nf3 Nf6 5. d4 c6 | |
| SD14 | 2. exd5 Qd5 3. Nc3 Da5 4. Nf3 Nf6 5. d4 Nc6 | |
| SD15 | 2. exd5 Qd5 3. Nc3 Da5 4. Nf3 Nf6 5. d4 Bg4 | |
| SD16 | 2. exd5 Qd5 3. Nc3 Da5 4. Nf3 Nf6 5. d4 Bf5 | |
| SI: Sicilian Defense (1. e4 c5) | ||
| SI1 | 2. Nf3 d6 | |
| SI2 | 2. Nf3 d6 3. d4 cxd4 4. Qd4 | |
| SI3 | 2. Nf3 d6 3. d4 cxd4 4. Nd4 Nf6 | |
| SI4 | 5.… a6 6. Bg5 | Najdorf |
| SI5 | 5.… a6 6. Bg5 e6 7. f4 Qc7 | Najdorf |
| SI6 | 6.… e6 7. f4 Nbd7 | Najdorf |
| SI7 | 6.… e6 7. f4 b5 | Polugaevsky |
| SI8 | 6.… e6 7. f4 Qb6 | Poisoned Pawn |
| SI9 | 6.… e6 7. f4 Be7 | Main line |
| SI10 | 5.… a6 6. Be2 | Geller |
| SI11 | 5.… a6 6. Be2 e5 7. Nb3 Be7 | Geller |
| SI12 | 5.… a6 6. f4 | Najdorf |
| SI13 | 5.… a6 6. Bc4 | Fisherman |
| SI14 | 5.… a6 | Najdorf |
| SI15 | 5.… g6 | Dragon |
| SI16 | 5.… g6 6. Be3 [6. … Bg7] | Dragon |
| SI17 | 7. f3 | Dragon |
| SI18 | 7. f3 Nc6 8. Qd2 0-0 9. Bc4 | Dragon |
| SI19 | 5.… e6 Scheveningen | Scheveningen |
| SI20 | 5.… e6 6. g4 | Keres |
| SI21 | 5.… e6 6. f4 | Scheveningen |
| SI22 | 5.… e6 6. Be2 | Scheveningen |
| SI23 | 5.… e6 6. Be2 a6 | Scheveningen |
| SI24 | 7. 0-0 Qc7 8. f4 Sc6 | Scheveningen |
| SI25 | 5.… Nc6 | Sozin |
| SI26 | 5.… Nc6 6. Bc4 e6 | Velimirovic |
| SI27 | 5.… Nc6 6. Bg5 | Richter-Rauzer |
| SI28 | 6.… e6 7. Qd2 Be7 8. 0–0–0 0–0 | Richter-Rauzer |
| SI29 | 6.… e6 7. Qd2 a6 | Richter-Rauzer |
| SI30 | 6.… e6 7. Qd2 a6 8. 0–0-0 Bd7 | Richter-Rauzer |
| SI31 | 2. Nf3 Nc6 3. Bb5 | Rossolimo |
| SI32 | 2. Nf3 Nc6 [3. d4 cxd4 4. Nd4 e5] De la | Bourdonnais |
| SI33 | 4.… g6 | Accelerated Dragon |
| SI34 | 4.… Nf6 5. Nc3 [5. … E6] | Four Knights |
| SI35 | 4.… Nf6 5. Nc3 e5 | Lasker |
| SI36 | 6. Ndb5 d6 7. Bg5 a6 | Pelican / bird |
| SI37 | 8. Sa3 b5 | Sveshnikov |
| SI38 | 9. Bf6 [9. … Gxf6 10. Nd5] | Sveshnikov |
| SI39 | 4.… e6 | Taimanov |
| SI40 | 4.… e6 5. Nc3 Qc7 | Taimanov |
| SI41 | 2. Nf3 e6 | Paulsen |
| SI42 | 2. Nf3 e6 3. d4 cxd4 4. Nd4 a6 5. Bd3 | Paulsen |
| SI43 | 2. Nf3 [2. … A6 and 2.… Nf6] | Nimzowitsch |
| SI44 | 2. Nc3 2. d3 |
Closed |
| SI45 | 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 | Closed |
| SI46 | 2. c3 | Alapin |
| SI47 | 2. c3 Nf6 3. e5 Nd5 | Alapin |
| SI48 | 2. b4 2. b3 2. Ne2 2. Bc4 |
|
| SI49 | 2. f4 | Grand Prix |
| SI50 | 2. d4 | Morra Gambit |
| SL: Queen's Gambit ( Slavic Defense ) (1. d4 d5 2. c4 c6) | ||
| SL1 | 3. Nf3 | |
| SL2 | 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 | Exchange |
| SL3 | 3. Nf3 Nf6 4. Nc3 | |
| SL4 | 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 | Alapin |
| SL5 | 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bc4 Bb4 8. 0-0 | Alapin |
| SL6 | 3. Nc3 e6 | |
| SL7 | 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 dxc4 6. e4 b5 | Botvinnik |
| SL8 | 3. Nc3 Nf6 4. Nf3 e6 5. e3 | Semi-slav |
| SL9 | 3. Nc3 Nf6 4. Nf3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bc4 b5 | Meran |
| SL10 | 3. Nf3 Nf6 4. e3 g6 | Worse |
| SL11 | 3. * | |
| SO: Scottish game (1. e4 e5 2. Nf3 Nc6 3. d4) | ||
| SO1 | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 | |
| SO2 | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5 | Belgrade gambit |
| SO3 | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd4 | Four Knights |
| SO4 | 1. e4 e5 2. Nf3 Nc6 3. d4 | |
| SO5 | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nd4 Bc5 | |
| SO6 | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | Goring / Scotch gambit |
| TD: Tarrasch Defense (1. d4 d5 2. c4 e6 [3. Nc3 c5]) | ||
| TD1 | 3. Nc3 c5 | |
| TD2 | 3. Nc3 c5 4. Nf3 Nf6 5. cxd5 Nd5 | |
| TD3 | 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 | |
| TD4 | 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 | |
| TD5 | 3. Nf3 c5 | |
| VG: Viennese game (1. e4 e5 2. Nc3) | ||
| VG1 | 1. e4 e5 2. Nc3 Nf6 | |
| VG2 | 1. e4 e5 2. Nc3 Nf6 3. Bc4 | |
| VG3 | 1. e4 e5 2. Nc3 Nf6 3. f4 | |
| VG4 | 1. e4 e5 2. Nc3 | |
| VO: Rare closed games , rare semi-open games (1st *) | ||
| VO1 | 1. e4 | Basman |
| VO2 | 1. e4 b6 2. d4 [2. … Bb7 and 2.… e6] | Owen |
| VO3 | 1. e4 b6 2. d4 Bb7 3. Bd3 e6 | Owen |
| VO4 | 1. e4 Nc6 | Nimzowitsch |
| VO5 | 1. e4 Nc6 2. Nf3 | Nimzowitsch |
| VO6 | 1. e4 Nc6 2. d4 d5 | Nimzowitsch |
| VO7 | 1. f4 | Bird |
| VO8 | 1. b3 | Larsen |
| VO9 | 1. g3 | |
| VO10 | 1. b4 | Sokolsky |
| VO11 | 1. g4 | Rough |
| VO12 | 1. Nc3 | Van Geet |
| VO13 | 1. d4 d5 2. c4 | |
| VO14 | 1. d4 d5 2. c4 Sc6 | Chigorin |
| VO15 | 1. d4 d5 2. c4 e5 | Albin |
| VO16 | 1. d4 d5 2. Nc3 Nf6 3. e4 | Blackmar-Diemer |
| VO17 | 1. d4 Nf6 2. c4 e5 | Budapest Gambit |
| VO18 | 1. d4 Nf6 2. c4 | |
| VO19 | 1. d4 b6 | |
| VO20 | 1. d4 Nc6 | |
| VO21 | 1. d4 d6 | |
| VO22 | 1. d4 e6 | |
| VO23 | 1. d4 g6 | |
| VO24 | 1. d4 e5 | Englund |
| VO25 | 1. * | |