A00 Van Geet Opening
Also filed here: Polish Opening, Grob Opening, Hungarian Opening, Kádas Opening, Ware Opening, Barnes Opening and 13 more.
A00 holds 144 named lines from 20 openings, most of them (30) under Van Geet Opening. Its reference line is a single first move, played from the initial position. With 144 named lines it is the largest code of all 500 codes. Material is no longer level at the end of 31 of its lines; the widest gap, two pawns in White’s favour, comes in Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit.
| # | White | Black |
|---|---|---|
| 1 | Nc3 |
What each move does
- 1.Nc3 The knight leaves b1 for c3, opening a line for the rook on a1.
Lines filed under A00
They begin with 14 different first moves.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Amar Opening | 1.Nh3 | 1 | |
| Anderssen’s Opening | 1.a3 | 1 | |
| Barnes Opening | 1.f3 | 1 | |
| Clemenz Opening | 1.h3 | 1 | |
| Grob Opening | 1.g4 | 1 | |
| Hungarian Opening | 1.g3 | 1 | |
| Kádas Opening | 1.h4 | 1 | |
| Mieses Opening | 1.d3 | 1 | |
| Polish Opening | 1.b4 | 1 | |
| Saragossa Opening | 1.c3 | 1 | |
| Sodium Attack | 1.Na3 | 1 | |
| Van Geet Opening | 1.Nc3 | 1 | |
| Van’t Kruijs Opening | 1.e3 | 1 | |
| Ware Opening | 1.a4 | 1 | |
| Grob Opening: Alessi Gambit | 1.g4 f5 | 2 | |
| Grob Opening: Double Grob | 1.g4 g5 | 2 | |
| Hungarian Opening: Dutch Defense | 1.g3 f5 | 2 | |
| Hungarian Opening: Indian Defense | 1.g3 Nf6 | 2 | |
| Hungarian Opening: Myers Defense | 1.g3 g5 | 2 | |
| Hungarian Opening: Sicilian Invitation | 1.g3 c5 | 2 | |
| Hungarian Opening: Symmetrical Variation | 1.g3 g6 | 2 | |
| Kádas Opening: Koola-Koola Variation | 1.h4 a5 | 2 | |
| Kádas Opening: Schneider Gambit | 1.h4 g5 | 2 | |
| Lasker Simul Special | 1.g3 h5 | 2 | |
| Mieses Opening: Reversed Rat | 1.d3 e5 | 2 | |
| Polish Opening, with d5 | 1.b4 d5 | 2 | |
| Polish Opening: Birmingham Gambit | 1.b4 c5 | 2 | |
| Polish Opening: Dutch Defense | 1.b4 f5 | 2 | |
| Polish Opening: Grigorian Variation | 1.b4 Nc6 | 2 | |
| Polish Opening: Karniewski Variation | 1.b4 Nh6 | 2 | |
| Polish Opening: Outflank Variation | 1.b4 c6 | 2 | |
| Polish Opening: Symmetrical Variation | 1.b4 b5 | 2 | |
| Van Geet Opening: Laroche Gambit | 1.Nc3 b5 | 2 | |
| Van Geet Opening: Reversed Nimzowitsch | 1.Nc3 e5 | 2 | |
| Ware Opening: Symmetric Variation | 1.a4 a5 | 2 | |
| Anderssen’s Opening: Polish Gambit | 1.a3 a5 2.b4 | 3 | |
| Barnes Opening: Hammerschlag | 1.f3 e5 2.Kf2 | 3 | |
| Clemenz Opening: Spike Lee Gambit | 1.h3 h5 2.g4 | 3 | |
| Global Opening | 1.h3 e5 2.a3 | 3 | |
| Grob Opening: Double Grob, Coca-Cola Gambit | 1.g4 g5 2.f4 | 3 | |
| Grob Opening: Grob Gambit | 1.g4 d5 2.Bg2 | 3 | |
| Hungarian Opening: Reversed Alekhine | 1.g3 e5 2.Nf3 | 3 | |
| Kádas Opening: Beginner’s Trap | 1.h4 d5 2.Rh3 | 3 | |
| Kádas Opening: Kádas Gambit | 1.h4 c5 2.b4 | 3 | |
| Mieses Opening: Myers Spike Attack | 1.d3 g6 2.g4 | 3 | |
| Polish Opening: Bugayev Attack | 1.b4 e5 2.a3 | 3 | |
| Sodium Attack: Chenoboskion Variation | 1.Na3 g6 2.g4 | 3 | |
| Valencia Opening | 1.d3 e5 2.Nd2 | 3 | |
| Van Geet Opening: Battambang Variation | 1.a3 e5 2.Nc3 | 3 | |
| Van Geet Opening: Düsseldorf Gambit | 1.Nc3 c5 2.b4 | 3 | |
| Van Geet Opening: Myers Attack | 1.Nc3 g6 2.h4 | 3 | |
| Van Geet Opening: Twyble Attack | 1.Nc3 c5 2.Rb1 | 3 | |
| Van Geet Opening: Tübingen Gambit | 1.Nc3 Nf6 2.g4 | 3 | |
| Ware Opening: Crab Variation | 1.a4 e5 2.h4 | 3 | |
| Ware Opening: Meadow Hay Trap | 1.a4 e5 2.Ra3 | 3 | |
| Barnes Opening: Fool’s Mate | 1.f3 e5 2.g4 Qh4# | 4 | check |
| Creepy Crawly Formation: Classical Defense | 1.h3 d5 2.a3 e5 | 4 | |
| Grob Opening: Grob Gambit Declined | 1.g4 d5 2.Bg2 c6 | 4 | |
| Grob Opening: London Defense | 1.g4 e5 2.h3 Nc6 | 4 | |
| Hungarian Opening: Catalan Formation | 1.g3 d5 2.Bg2 e6 | 4 | |
| Hungarian Opening: Reversed Modern Defense | 1.g3 d5 2.Bg2 c5 | 4 | |
| Hungarian Opening: Slav Formation | 1.g3 d5 2.Bg2 c6 | 4 | |
| Hungarian Opening: Van Kuijk Gambit | 1.g3 h5 2.Nf3 h4 | 4 | |
| Polish Opening: Baltic Defense | 1.b4 d5 2.Bb2 Bf5 | 4 | |
| Polish Opening: Czech Defense | 1.b4 e5 2.Bb2 d6 | 4 | |
| Polish Opening: German Defense | 1.b4 d5 2.Bb2 Qd6 | 4 | |
| Polish Opening: King’s Indian Variation | 1.b4 Nf6 2.Bb2 g6 | 4 | |
| Polish Opening: Wolferts Gambit | 1.b4 e5 2.Bb2 c5 | 4 | |
| Van Geet Opening: Billockus-Johansen Gambit | 1.Nc3 e5 2.Nf3 Bc5 | 4 | |
| Van Geet Opening: Damhaug Gambit | 1.Nc3 d5 2.f4 e5 | 4 | |
| Van Geet Opening: Warsteiner Gambit | 1.Nc3 d5 2.f4 g5 | 4 | |
| Ware Opening: Wing Gambit | 1.a4 b5 2.axb5 Bb7 | 4 | White +1 |
| Amar Opening: Paris Gambit | 1.Nh3 d5 2.g3 e5 3.f4 | 5 | |
| Barnes Opening: Gedult Gambit | 1.f3 f5 2.e4 fxe4 3.Nc3 | 5 | Black +1 |
| Grob Opening: Grob Gambit, Basman Gambit | 1.g4 d5 2.Bg2 h5 3.gxh5 | 5 | White +1 |
| Grob Opening: Grob Gambit, Fritz Gambit | 1.g4 d5 2.Bg2 Bxg4 3.c4 | 5 | Black +1 |
| Grob Opening: Spike Attack | 1.g4 d5 2.Bg2 c6 3.g5 | 5 | |
| Grob Opening: Spike, Hurst Attack | 1.g4 e5 2.Bg2 d5 3.c4 | 5 | |
| Grob Opening: Zilbermints Gambit | 1.g4 d5 2.e4 dxe4 3.Nc3 | 5 | Black +1 |
| Hungarian Opening: Bücker Gambit | 1.g3 d5 2.Bg2 e5 3.b4 | 5 | |
| Hungarian Opening: Reversed Norwegian Defense | 1.g3 e5 2.Nf3 e4 3.Nh4 | 5 | |
| Kádas Opening: Kádas Gambit | 1.h4 e5 2.d4 exd4 3.c3 | 5 | Black +1 |
| Kádas Opening: Myers Variation | 1.h4 d5 2.d4 c5 3.e4 | 5 | |
| Kádas Opening: Steinbok Gambit | 1.h4 f5 2.e4 fxe4 3.d3 | 5 | Black +1 |
| Mieses Opening: Venezolana Variation | 1.d3 c5 2.Nc3 Nc6 3.g3 | 5 | |
| Polish Opening, with d5 | 1.b4 d5 2.Bb2 Nf6 3.Nf3 | 5 | |
| Polish Opening: Bugayev Advance Variation | 1.b4 e5 2.Bb2 f6 3.b5 | 5 | |
| Polish Opening: King’s Indian Variation, Schiffler Attack | 1.b4 Nf6 2.Bb2 g6 3.e4 | 5 | |
| Polish Opening: Myers Variation | 1.b4 d5 2.Bb2 c6 3.a4 | 5 | |
| Polish Opening: Outflank Variation, Schuehler Gambit | 1.b4 c6 2.Bb2 a5 3.b5 | 5 | |
| Polish Opening: Tartakower Gambit | 1.b4 e5 2.Bb2 f6 3.e4 | 5 | |
| Van Geet Opening: Dougherty Gambit | 1.Nc3 d5 2.e4 dxe4 3.f3 | 5 | Black +1 |
| Van Geet Opening: Dunst-Perrenet Gambit | 1.Nc3 d5 2.e4 dxe4 3.d3 | 5 | Black +1 |
| Van Geet Opening: Hector Gambit | 1.Nc3 d5 2.e4 dxe4 3.Bc4 | 5 | Black +1 |
| Van Geet Opening: Kluever Gambit | 1.Nc3 f5 2.e4 fxe4 3.d3 | 5 | Black +1 |
| Van Geet Opening: Napoleon Attack | 1.Nc3 e5 2.Nf3 Nc6 3.d4 | 5 | |
| Van Geet Opening: Nowokunski Gambit | 1.Nc3 e5 2.f4 exf4 3.e4 | 5 | Black +1 |
| Van Geet Opening: Venezolana Variation | 1.Nc3 d5 2.d3 Nf6 3.g3 | 5 | |
| Van’t Kruijs Opening: Bouncing Bishop Variation | 1.e3 e5 2.Bc4 b5 3.Bb3 | 5 | |
| Grob Opening: Keene Defense | 1.g4 d5 2.h3 e5 3.Bg2 c6 | 6 | |
| Grob Opening: Romford Countergambit | 1.g4 d5 2.Bg2 Bxg4 3.c4 d4 | 6 | Black +1 |
| Grob Opening: Zilbermints Gambit, Schiller Defense | 1.g4 d5 2.e4 dxe4 3.Nc3 h5 | 6 | Black +1 |
| Hungarian Opening: Pachman Gambit | 1.g3 f5 2.e4 fxe4 3.Qh5+ g6 | 6 | Black +1 |
| Polish Opening: Queen’s Indian Variation | 1.b4 e6 2.Bb2 Nf6 3.b5 b6 | 6 | |
| Polish Opening: Queenside Defense | 1.b4 e6 2.Bb2 Nf6 3.b5 a6 | 6 | |
| Sodium Attack: Durkin Gambit | 1.Na3 e5 2.Nc4 Nc6 3.e4 f5 | 6 | |
| Van Geet Opening: Hergert Gambit | 1.Nc3 d6 2.f4 e5 3.fxe5 Nc6 | 6 | White +1 |
| Van Geet Opening: Hulsemann Gambit | 1.Nc3 e5 2.e3 d5 3.Qh5 Be6 | 6 | |
| Van Geet Opening: Liebig Gambit | 1.Nc3 e5 2.e3 d5 3.Qh5 Nf6 | 6 | |
| Van Geet Opening: Melleby Gambit | 1.Nc3 d5 2.f4 d4 3.Ne4 c5 | 6 | |
| Van Geet Opening: Pfeiffer Gambit | 1.Nc3 d5 2.f4 d4 3.Ne4 e5 | 6 | |
| Van Geet Opening: Sleipnir Gambit | 1.Nc3 d5 2.e3 e5 3.d4 Bb4 | 6 | |
| Ware Opening: Cologne Gambit | 1.a4 b6 2.d4 d5 3.Nc3 Nd7 | 6 | |
| Barnes Opening: Gedult Gambit | 1.f3 d5 2.e4 g6 3.d4 dxe4 4.c3 | 7 | Black +1 |
| Grob Opening: Grob Gambit, Keres Gambit | 1.g4 d5 2.Bg2 e5 3.d4 exd4 4.c3 | 7 | Black +1 |
| Grob Opening: Grob Gambit, Richter-Grob Gambit | 1.g4 d5 2.Bg2 c6 3.c4 dxc4 4.b3 | 7 | Black +1 |
| Grob Opening: Zilbermints Gambit, Zilbermints-Hartlaub Gambit | 1.g4 d5 2.e4 dxe4 3.Nc3 e5 4.d3 | 7 | Black +1 |
| Hungarian Opening: Reversed Brooklyn Defense, Brooklyn Benko Gambit | 1.g3 e5 2.Nf3 e4 3.Ng1 Nf6 4.b4 | 7 | |
| Hungarian Opening: Winterberg Gambit | 1.g3 d5 2.Bg2 e5 3.c4 dxc4 4.b3 | 7 | Black +1 |
| Kádas Opening: Kádas Gambit | 1.h4 d5 2.d4 c5 3.Nf3 cxd4 4.c3 | 7 | Black +1 |
| Polish Opening: Schiffler-Sokolsky Variation | 1.b4 e6 2.Bb2 Nf6 3.b5 d5 4.e3 | 7 | |
| Polish Opening: Schuehler Gambit | 1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4 | 7 | Black +1 |
| Van Geet Opening: Gladbacher Gambit | 1.Nc3 e5 2.b3 d5 3.e4 dxe4 4.d3 | 7 | Black +1 |
| Van Geet Opening: Novosibirsk Variation | 1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4 | 7 | |
| Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit | 1.Nc3 d5 2.f4 d4 3.Ne4 e5 4.Nf3 | 7 | |
| Van Geet Opening: Reversed Scandinavian | 1.Nc3 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qa4 | 7 | |
| Van Geet Opening: Sicilian Two Knights | 1.Nc3 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 | 7 | |
| Van’t Kruijs Opening: Keoni-Hiva Gambit, Akahi Variation | 1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3 | 7 | Black +1 |
| Van’t Kruijs Opening: Keoni-Hiva Gambit, Alua Variation | 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 | 7 | Black +1 |
| Van’t Kruijs Opening: Keoni-Hiva Gambit, Ekolu Variation | 1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3 | 7 | Black +1 |
| Ware Opening: Ware Gambit | 1.a4 e5 2.a5 d5 3.e3 f5 4.a6 | 7 | |
| Amsterdam Attack | 1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6 | 8 | |
| Hungarian Opening: Burk Gambit | 1.g3 e5 2.a3 d5 3.Nf3 e4 4.Nh4 Be7 5.d3 | 9 | |
| Hungarian Opening: Paris Gambit | 1.g3 e5 2.Nh3 d5 3.f4 Bxh3 4.Bxh3 exf4 5.O-O | 9 | Black +1, White castled |
| Sodium Attack: Celadon Variation | 1.Na3 e5 2.d3 Bxa3 3.bxa3 d5 4.e3 c5 5.Rb1 | 9 | |
| Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit | 1.g4 d5 2.Bg2 Bxg4 3.c4 d4 4.Bxb7 Nd7 5.Bxa8 Qxa8 | 10 | White +2 |
| Hungarian Opening: Asten Gambit | 1.g3 Nc6 2.Nc3 d5 3.d4 e5 4.dxe5 d4 5.Ne4 f5 | 10 | White +1 |
| Amar Opening: Paris Gambit, Gent Gambit | 1.Nh3 d5 2.g3 e5 3.f4 Bxh3 4.Bxh3 exf4 5.O-O fxg3 6.hxg3 | 11 | Black +1, White castled |
| Polish Opening: King’s Indian Variation, Sokolsky Attack | 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 d6 5.Nf3 O-O 6.d4 | 11 | Black castled |
| Polish Opening: Rooks Swap Line | 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.a4 axb5 5.axb5 Rxa1 6.Bxa1 | 11 | |
| Van Geet Opening: Jendrossek Gambit | 1.Nc3 d5 2.f4 d4 3.Ne4 f5 4.Nf2 Nf6 5.Nf3 c5 6.b4 | 11 | |
| Grob Opening: Keene Defense, Main Line | 1.g4 d5 2.h3 e5 3.Bg2 c6 4.d4 e4 5.c4 Bd6 6.Nc3 Ne7 | 12 | |
| Formation: Hippopotamus Attack | 1.a3 e5 2.b3 d5 3.c3 Nf6 4.d3 Nc6 5.e3 Bd6 6.f3 O-O 7.g3 | 13 | Black castled |
| Formation: Shy Attack | 1.a3 e5 2.g3 d5 3.Bg2 Nf6 4.d3 Nc6 5.Nd2 Bd6 6.e3 O-O 7.h3 | 13 | Black castled |
The position after 1.Nc3
White has brought out the knight on c3; Black has not yet moved a knight or bishop. Black is to move and has 20 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| A01 | Nimzo-Larsen Attack | four squares: b1, b2, b3, c3 |
| A02 | Bird Opening | four squares: b1, f2, c3, f4 |
| A04 | Zukertort Opening | four squares: b1, g1, c3, f3 |
| A10 | English Opening | four squares: b1, c2, c3, c4 |
| A16 | English Opening: Anglo-Indian Defense, Queen’s Knight Variation | four squares: c2, c4, f6, g8 |
| A21 | English Opening: King’s English Variation, Reversed Sicilian | four squares: c2, c4, e5, e7 |
| A34 | English Opening: Symmetrical Variation, Normal Variation | four squares: c2, c4, c5, c7 |