Irregular Chess Openings

MICOS Opening Group A00.IO – Irregular Openings covers chess openings that begin outside the more conventional opening systems. These openings can lead to unusual positions and move orders, giving players opportunities to explore less familiar strategic and tactical ideas. Use the searchable table below to find openings by opening name, chess notation or MICOS code and train individual openings interactively with MICOS CAP.

Search by Opening Name, Chess Notation or MICOS Code. MICOS classifies each opening by its exact move order.

Opening NameChess NotationMICOS CodeMICOS CAP

1. Anderssen's Opening

Anderssen's Opening1.a3A00.001.IOExplore ▶
Anderssen's Opening: Polish Gambit1.a3 a5 2.b4A00.002.IOExplore ▶
Anderssen's Opening: Hippopotamus Attack1.a3 e5 2.b3 d5 3.c3 Nf6 4.d3 Nc6 5.e3 Bd6 6.f3 0-0 7.g3A00.003.IOExplore ▶
Anderssen's Opening: Shy Attack1.a3 e5 2.g3 d5 3.Bg2 Nf6 4.d3 Nc6 5.Nd2 Bd6 6.e3 0-0 7.h3A00.004.IOExplore ▶
Anderssen's Opening: Creepy Crawly Formation1.a3 e5 2.h3 d5A00.005.IOExplore ▶
Anderssen's Opening: Andersspike1.a3 g6 2.g4A00.006.IOExplore ▶

2. Ware Opening

Ware Opening1.a4A00.007.IOExplore ▶
Ware Opening: Symmetrical1.a4 a5A00.008.IOExplore ▶
Ware Opening: Crab Attack1.a4 a5 2.h4A00.009.IOExplore ▶
Ware Opening: Wing Gambit1.a4 b5 2.axb5 Bb7A00.010.IOExplore ▶
Ware Opening: Cologne Gambit1.a4 b6 2.d4 d5 3.Nc3 Nd7A00.011.IOExplore ▶
Ware Opening: Ware Gambit1.a4 e5 2.a5 d5 3.e3 f5 4.a6A00.012.IOExplore ▶
Ware Opening: Aquisap Opening1.a4 e5 2.e4A00.013.IOExplore ▶
Ware Opening: Crab Opening1.a4 e5 2.h4A00.014.IOExplore ▶
Ware Opening: Meadow Hay Trap1.a4 e5 2.Ra3A00.015.IOExplore ▶

3. Polish Opening

Polish Opening (Sokolsky Opening)1.b4A00.016.IOExplore ▶
Polish Opening: Symmetrical1.b4 b5A00.017.IOExplore ▶
Polish Opening: Birmingham Gambit1.b4 c5A00.018.IOExplore ▶
Polish Opening: Outflank1.b4 c6A00.019.IOExplore ▶
Polish Opening: Schuehler Gambit1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4A00.020.IOExplore ▶
Polish Opening: Baltic Defence1.b4 d5 2.Bb2 Bf5A00.021.IOExplore ▶
Polish Opening: Myers Attack1.b4 d5 2.Bb2 c6 3.a4A00.022.IOExplore ▶
Polish Opening: Labahn Gambit1.b4 d5 2.Bb2 d4 3.Nf3 c5A00.023.IOExplore ▶
Polish Opening: German Defence1.b4 d5 2.Bb2 Qd6A00.024.IOExplore ▶
Polish Opening: Diemer Gambit1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.e4 dxe4 5.f3A00.025.IOExplore ▶
Polish Opening: Bugayev Attack1.b4 e5 2.a3A00.026.IOExplore ▶
Polish Opening: Kucharkowski Meybohm Gambit1.b4 e5 2.Bb2 Bxb4 3.f4 exf4 4.Bxg7 Qh4+ 5.g3 fxg3 6.Bg2 gxh2+ 7.Kf1 hxg1=Q+ 8.Kxg1A00.027.IOExplore ▶
Polish Opening: Wolferts Gambit1.b4 e5 2.Bb2 c5A00.028.IOExplore ▶
Polish Opening: Czech Defence1.b4 e5 2.Bb2 d6A00.029.IOExplore ▶
Polish Opening: Bugayev Advance1.b4 e5 2.Bb2 f6 3.b5A00.030.IOExplore ▶
Polish Opening: Tartakower Gambit1.b4 e5 2.Bb2 f6 3.e4A00.031.IOExplore ▶
Polish Opening: Schiffler-Sokolsky-Tartakower Gambit1.b4 e5 2.Bb2 f6 3.e4 Bxb4A00.032.IOExplore ▶
Polish Opening: Tartakower Gambit Brinckmann1.b4 e5 2.Bb2 f6 3.e4 Bxb4 4.Bc4 Nc6 5.f4 Qe7 6.f5 g6A00.033.IOExplore ▶
Polish Opening: Lewin Double Gambit1.b4 e5 2.e4 Bxb4 3.f4 exf4A00.034.IOExplore ▶
Polish Opening: Dutch Defence1.b4 f5A00.035.IOExplore ▶
Polish Opening: Bucker Defence1.b4 Na6A00.036.IOExplore ▶
Polish Opening: Grigorian Defence1.b4 Nc6A00.037.IOExplore ▶
Polish Opening: Schiffler-Sokolsky Attack1.b4 Nf6 2.Bb2 d5 3.e3 e6 4.b5A00.038.IOExplore ▶
Polish Opening: Hartlaub Gambit1.b4 Nf6 2.Bb2 e6 3.a3 c6 4.d3 a5 5.bxa5 d5 6.e4A00.039.IOExplore ▶
Polish Opening: Queenside Defence1.b4 Nf6 2.Bb2 e6 3.b5 a6A00.040.IOExplore ▶
Polish Opening: Rook Exchange Defence1.b4 Nf6 2.Bb2 e6 3.b5 a6 4.a4 axb5 5.axb5 Rxa1 6.Bxa1A00.041.IOExplore ▶
Polish Opening: Indian Formation1.b4 Nf6 2.Bb2 e6 3.b5 b6A00.042.IOExplore ▶
Polish Opening: King’s Indian Formation1.b4 Nf6 2.Bb2 g6A00.043.IOExplore ▶
Polish Opening: King's Indian Sokolsky Attack1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 d6 5.Nf3 0-0 6.d4A00.044.IOExplore ▶
Polish Opening: King's Indian Schiffler Attack1.b4 Nf6 2.Bb2 g6 3.e4A00.045.IOExplore ▶
Polish Opening: Spike Attack1.b4 Nf6 2.Bb2 g6 3.g4A00.046.IOExplore ▶
Polish Opening: Zukertort System1.b4 Nf6 2.Nf3A00.047.IOExplore ▶
Polish Opening: Karniewski Defence1.b4 Nh6A00.048.IOExplore ▶

4. Saragossa Opening

Saragossa Opening1.c3A00.049.IOExplore ▶
Saragossa Opening: Cabbage Attack1.c3 e5 2.a3 d5 3.b3 Nf6 4.Bb2 Nc6 5.a4 Bd6 6.g3 0-0 7.e3A00.050.IOExplore ▶
Saragossa Opening: Bendig Gambit1.c3 e5 2.e4 Nc6 3.f4A00.051.IOExplore ▶
Saragossa Opening: Hanham Hayward Attack1.c3 e5 2.Qc2A00.052.IOExplore ▶

5. Mieses Opening

Mieses Opening1.d3A00.053.IOExplore ▶
Mieses Opening: Venezolana1.d3 c5 2.Nc3 Nc6 3.g3A00.054.IOExplore ▶
Mieses Opening: Reversed Rat1.d3 e5A00.055.IOExplore ▶
Mieses Opening: Reversed Rat - Valencia Opening1.d3 e5 2.Bd2A00.056.IOExplore ▶
Mieses Opening: Valencia Opening1.d3 e5 2.Nd2A00.057.IOExplore ▶
Mieses Opening: Myers Spike Attack1.d3 g6 2.g4A00.058.IOExplore ▶

7. Van't Kruijs Opening

Van't Kruijs Opening1.e3A00.059.IOExplore ▶
Van't Kruijs Opening: Keoni Hiva Gambit Delayed1.e3 d5 2.Nc3 Nf6 3.a3 e5 4.f4 exf4 5.Nf3A00.060.IOExplore ▶
Van't Kruijs Opening: 1…e51.e3 e5A00.061.IOExplore ▶
Van't Kruijs Opening: Bouncing Bishop1.e3 e5 2.Bc4 b5 3.Bb3A00.062.IOExplore ▶
Van't Kruijs Opening: Amsterdam Attack1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6A00.063.IOExplore ▶
Van't Kruijs Opening: Keoni Hiva Gambit Ekolu1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3A00.064.IOExplore ▶
Van't Kruijs Opening: Keoni Hiva Gambit Alua1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3A00.065.IOExplore ▶
Van't Kruijs Opening: Keoni Hiva Gambit Akahi1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3A00.066.IOExplore ▶

8. Barnes Opening

Barnes Opening1.f3A00.067.IOExplore ▶
Barnes Opening: Gedult Gambit: 4.c31.f3 d5 2.e4 g6 3.d4 dxe4 4.c3A00.068.IOExplore ▶
Barnes Opening: Walkerling1.f3 e5 2.e4 Nf6 3.Bc4A00.069.IOExplore ▶
Barnes Opening: Fool's Mate1.f3 e5 2.g4 Qh4#A00.070.IOExplore ▶
Barnes Opening: Hammerschlag1.f3 e5 2.Kf2A00.071.IOExplore ▶
Barnes Opening: Gedult Gambit1.f3 f5 2.e4 fxe4 3.Nc3A00.072.IOExplore ▶

8. Hungarian Opening

Hungarian Opening: King's Fianchetto - Benko Opening1.g3A00.073.IOExplore ▶
Hungarian Opening: Sicilian Invitation1.g3 c5A00.074.IOExplore ▶
Hungarian Opening: Reversed Modern Defence1.g3 d5 2.Bg2 c5A00.075.IOExplore ▶
Hungarian Opening: Slav Formation1.g3 d5 2.Bg2 c6A00.076.IOExplore ▶
Hungarian Opening: Winterberg Gambit1.g3 d5 2.Bg2 e5 3.c4 dxc4 4.b3A00.077.IOExplore ▶
Hungarian Opening: Regan Attack1.g3 d5 2.Bg2 e5 3.d4A00.078.IOExplore ▶
Hungarian Opening: Catalan Formation1.g3 d5 2.Bg2 e6A00.079.IOExplore ▶
Hungarian Opening: Wiedenhagen Beta Gambit1.g3 d5 2.Nf3 g5A00.080.IOExplore ▶
Hungarian Opening: Burk Gambit1.g3 e5 2.a3 d5 3.Nf3 e4 4.Nh4 Be7 5.d3A00.081.IOExplore ▶
Hungarian Opening: Buecker Gambit1.g3 e5 2.Bg2 d5 3.b4A00.082.IOExplore ▶
Hungarian Opening: Reversed Alekhine1.g3 e5 2.Nf3A00.083.IOExplore ▶
Hungarian Opening: Reversed Brooklyn Defence Benko Gambit1.g3 e5 2.Nf3 e4 3.Ng1 Nf6 4.b4A00.084.IOExplore ▶
Hungarian Opening: Reversed Norwegian Defence1.g3 e5 2.Nf3 e4 3.Nh4A00.085.IOExplore ▶
Hungarian Opening: Paris Gambit1.g3 e5 2.Nh3 d5 3.f4 Bxh3 4.Bxh3 exf4 5.0-0A00.086.IOExplore ▶
Hungarian Opening: Dutch Defence1.g3 f5A00.087.IOExplore ▶
Hungarian Opening: Paschmann Gambit1.g3 f5 2.e4 fxe4 3.Qh5+ g6A00.088.IOExplore ▶
Hungarian Opening: Myers Defence1.g3 g5A00.089.IOExplore ▶
Hungarian Opening: Symmetrical1.g3 g6A00.090.IOExplore ▶
Hungarian Opening: Lasker Simultan Special Defence1.g3 h5A00.091.IOExplore ▶
Hungarian Opening: Van Kruijk Gambit1.g3 h5 2.Nf3 h4A00.092.IOExplore ▶
Hungarian Opening: Asten Gambit1.g3 Nc6 2.Nc3 d5 3.d4 e5 4.dxe5 d4 5.Ne4 f5A00.093.IOExplore ▶
Hungarian Opening: Indian Defence1.g3 Nf6A00.094.IOExplore ▶

9. Grob Opening

Grob Opening1.g4A00.095.IOExplore ▶
Grob Opening: Grob Gambit1.g4 d5 2.Bg2A00.096.IOExplore ▶
Grob Opening: Grob Gambit Fritz Gambit1.g4 d5 2.Bg2 Bxg4 3.c4A00.097.IOExplore ▶
Grob Opening: Romford Counter-Gambit1.g4 d5 2.Bg2 Bxg4 3.c4 d4A00.098.IOExplore ▶
Grob Opening: Fritz Gambit - Romford Counter-Gambit1.g4 d5 2.Bg2 Bxg4 3.c4 d4 4.Bxb7 Nd7 5.Bxa8 Qxa8A00.099.IOExplore ▶
Grob Opening: Grob Gambit Declined1.g4 d5 2.Bg2 c6A00.100.IOExplore ▶
Grob Opening: Grob Gambit - Richter Gambit1.g4 d5 2.Bg2 c6 3.c4 dxc4 4.b3A00.101.IOExplore ▶
Grob Opening: Spike Attack1.g4 d5 2.Bg2 c6 3.g5A00.102.IOExplore ▶
Grob Opening: Short Spike Attack1.g4 d5 2.Bg2 c6 3.h3A00.103.IOExplore ▶
Grob Opening: Grob Gambit - Keres Gambit1.g4 d5 2.Bg2 e5 3.d4 exd4 4.c3A00.104.IOExplore ▶
Grob Opening: Grob Gambit - Basman Gambit1.g4 d5 2.Bg2 h5 3.gxh5A00.105.IOExplore ▶
Grob Opening: Zilbermints Gambit1.g4 d5 2.e4 dxe4 3.Nc3A00.106.IOExplore ▶
Grob Opening: Zilbermints Gambit Hartlaub Attack1.g4 d5 2.e4 dxe4 3.Nc3 e5 4.d3A00.107.IOExplore ▶
Grob Opening: Zilbermints Gambit Schiller Defence1.g4 d5 2.e4 dxe4 3.Nc3 h5A00.108.IOExplore ▶
Grob Opening: Keene Defence: 6…Ne71.g4 d5 2.h3 e5 3.Bg2 c6 4.d4 e4 5.c4 Bd6 6.Nc3 Ne7A00.109.IOExplore ▶
Grob Opening: Spike Hurst Attack1.g4 e5 2.Bg2 d5 3.c4A00.110.IOExplore ▶
Grob Opening: Macho Keene Defence1.g4 e5 2.h3 d5 3.Bg2 c6A00.111.IOExplore ▶
Grob Opening: London Defence1.g4 e5 2.h3 Nc6A00.112.IOExplore ▶
Grob Opening: Alessi Gambit1.g4 f5A00.113.IOExplore ▶
Grob Opening: Double Grob1.g4 g5A00.114.IOExplore ▶
Grob Opening: Double Grob Coca Cola Gambit1.g4 g5 2.f4A00.115.IOExplore ▶
Grob Opening: Spike Deferred Attack1.g4 g6 2.d3A00.116.IOExplore ▶
Grob Opening: Bucker Defence1.g4 Nh6A00.117.IOExplore ▶

10. Clemenz Opening

Clemenz Opening1.h3A00.118.IOExplore ▶
Clemenz Opening: Global Opening1.h3 e5 2.a3A00.119.IOExplore ▶
Clemenz Opening: Spike Lee Gambit1.h3 h5 2.g4A00.120.IOExplore ▶

11. Kadas Opening

Kadas Opening (Desprez Opening)1.h4A00.121.IOExplore ▶
Kadas Opening: Koola-Koola1.h4 a5A00.122.IOExplore ▶
Kadas Opening: Kadas Gambit1.h4 c5 2.b4A00.123.IOExplore ▶
Kadas Opening: Deprez Opening - Myers Attack1.h4 d5 2.d4 c5 3.e3A00.124.IOExplore ▶
Kadas Opening: Myers Attack1.h4 d5 2.d4 c5 3.e4A00.125.IOExplore ▶
Kadas Opening: Kadas Gambit: 4.c31.h4 d5 2.d4 c5 3.Nf3 cxd4 4.c3A00.126.IOExplore ▶
Kadas Opening: Beginner's Trap1.h4 d5 2.Rh3A00.127.IOExplore ▶
Kadas Opening: Kadas Gambit: 3.c31.h4 e5 2.d4 exd4 3.c3A00.128.IOExplore ▶
Kadas Opening: Steinbok Gambit1.h4 f5 2.e4 fxe4 3.d3A00.129.IOExplore ▶
Kadas Opening: Schneider Gambit1.h4 g5A00.130.IOExplore ▶

12. Sodium Attack

Sodium Attack: Durkin Opening1.Na3A00.131.IOExplore ▶
Sodium Attack: Celadon Attack1.Na3 e5 2.d3 Bxa3 3.bxa3 d5 4.e3 c5 5.Rb1A00.132.IOExplore ▶
Sodium Attack: Durkin Gambit1.Na3 e5 2.Nc4 Nc6 3.e4 f5A00.133.IOExplore ▶
Sodium Attack: Chenoboskian Attack1.Na3 g6 2.g4A00.134.IOExplore ▶

13. Van Geet Opening

Van Geet Opening: Dunst Opening1.Nc3A00.135.IOExplore ▶
Van Geet Opening: St. George Defence1.Nc3 a6A00.136.IOExplore ▶
Van Geet Opening: Laroche Gambit1.Nc3 b5A00.137.IOExplore ▶
Van Geet Opening: Duesseldorf Gambit1.Nc3 c5 2.b4A00.138.IOExplore ▶
Van Geet Opening: Novosibirsk Attack1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4A00.139.IOExplore ▶
Van Geet Opening: Sicilian Two Knights1.Nc3 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4A00.140.IOExplore ▶
Van Geet Opening: Twyble Attack1.Nc3 c5 2.Rb1A00.141.IOExplore ▶
Van Geet Opening: Venezolana Attack1.Nc3 d5 2.d3 Nf6 3.g3A00.142.IOExplore ▶
Van Geet Opening: Sleipner Gambit1.Nc3 d5 2.e3 e5 3.d4 Bb4A00.143.IOExplore ▶
Van Geet Opening: Caro-Kann Defence1.Nc3 d5 2.e4 c6A00.144.IOExplore ▶
Van Geet Opening: St. Patrick's Attack1.Nc3 d5 2.e4 c6 3.h3A00.145.IOExplore ▶
Van Geet Opening: Hector Gambit1.Nc3 d5 2.e4 dxe4 3.Bc4A00.146.IOExplore ▶
Van Geet Opening: Dunst Perrenet Gambit1.Nc3 d5 2.e4 dxe4 3.d3A00.147.IOExplore ▶
Van Geet Opening: Dougherty Gambit1.Nc3 d5 2.e4 dxe4 3.f3A00.148.IOExplore ▶
Van Geet Opening: Pseudo Diemer Gambit1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3A00.149.IOExplore ▶
Van Geet Opening: Amazon Dunst1.Nc3 d5 2.e4 dxe4 3.Nxe4 Qd5A00.150.IOExplore ▶
Van Geet Opening: Myers Gambit1.Nc3 d5 2.e4 Nf6 3.d3 dxe4 4.Bg5A00.151.IOExplore ▶
Van Geet Opening: Melleby Gambit1.Nc3 d5 2.f4 d4 3.Ne4 c5A00.152.IOExplore ▶
Van Geet Opening: Pfeiffer Gambit1.Nc3 d5 2.f4 d4 3.Ne4 e5A00.153.IOExplore ▶
Van Geet Opening: Pfeiffer Gambit - Sleipnir Counter-Gambit1.Nc3 d5 2.f4 d4 3.Ne4 e5 4.Nf3A00.154.IOExplore ▶
Van Geet Opening: Jendrossek Gambit1.Nc3 d5 2.f4 d4 3.Ne4 f5 4.Nf2 Nf6 5.Nf3 c5 6.b4A00.155.IOExplore ▶
Van Geet Opening: Damhaug Gambit1.Nc3 d5 2.f4 e5A00.156.IOExplore ▶
Van Geet Opening: Warsteiner Gambit1.Nc3 d5 2.f4 g5A00.157.IOExplore ▶
Van Geet Opening: Hergert Gambit1.Nc3 d6 2.f4 e5 3.fxe5 Nc6A00.158.IOExplore ▶
Van Geet Opening: Reversed Nimzowitsch1.Nc3 e5A00.159.IOExplore ▶
Van Geet Opening: Battambang Attack1.Nc3 e5 2.a3A00.160.IOExplore ▶
Van Geet Opening: Gladbacher Gambit1.Nc3 e5 2.b3 d5 3.e4 dxe4 4.d3A00.161.IOExplore ▶
Van Geet Opening: Reversed Nimzowitsch 3…Nc61.Nc3 e5 2.d4 exd4 3.Qxd4 Nc6A00.162.IOExplore ▶
Van Geet Opening: Reversed Scandinavian1.Nc3 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qa4A00.163.IOExplore ▶
Van Geet Opening: Hulsemann Gambit1.Nc3 e5 2.e3 d5 3.Qh5 Be6A00.164.IOExplore ▶
Van Geet Opening: Liebig Gambit1.Nc3 e5 2.e3 d5 3.Qh5 Nf6A00.165.IOExplore ▶
Van Geet Opening: Nowokunski Gambit1.Nc3 e5 2.f4 exf4 3.e4A00.166.IOExplore ▶
Van Geet Opening: Billockus-Johansen Gambit1.Nc3 e5 2.Nf3 Bc5A00.167.IOExplore ▶
Van Geet Opening: Napoleon Attack1.Nc3 e5 2.Nf3 Nc6 3.d4A00.168.IOExplore ▶
Van Geet Opening: Kluever Gambit1.Nc3 f5 2.e4 fxe4 3.d3A00.169.IOExplore ▶
Van Geet Opening: Glasscoe Gambit1.Nc3 f5 2.g4A00.170.IOExplore ▶
Van Geet Opening: Anti-Pirc Attack1.Nc3 g6 2.h3A00.171.IOExplore ▶
Van Geet Opening: Myers Attack1.Nc3 g6 2.h4A00.172.IOExplore ▶
Van Geet Opening: Berlin Gambit1.Nc3 Nc6 2.d4 d5 3.e4 dxe4 4.d5A00.173.IOExplore ▶
Van Geet Opening: Tuebingen Gambit1.Nc3 Nf6 2.g4A00.174.IOExplore ▶

14. Amar Opening

Amar Opening1.Nh3A00.175.IOExplore ▶
Amar Opening: Paris Gambit1.Nh3 d5 2.g3 e5 3.f4A00.176.IOExplore ▶
Amar Gambit1.Nh3 d5 2.g3 e5 3.f4 Bxh3 4.Bxh3 exf4A00.177.IOExplore ▶
Amar Opening: Gent Gambit1.Nh3 d5 2.g3 e5 3.f4 Bxh3 4.Bxh3 exf4 5.0-0 fxg3 6.hxg3A00.178.IOExplore ▶
Amar Opening: Krazy Kat1.Nh3 e5 2.f3 d5 3.Nf2A00.179.IOExplore ▶

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