Irregular Queen’s Defences
MICOS Opening Group E00.IQ – Irregular Queen’s Defences covers responses to 1.d4 in which Black chooses less conventional first moves rather than the major responses such as 1…Nf6, 1…d5 or 1…g6. These openings often create unusual pawn structures and development patterns, allowing Black to steer the game away from more familiar Queen’s Pawn positions from the very beginning.
Irregular Queen’s Defences can lead to distinctive strategic and tactical positions where adaptability and an understanding of unfamiliar structures are particularly valuable. Their unconventional move orders can provide practical opportunities to take the game into less frequently encountered positions. 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 Name | Chess Notation | MICOS Code | MICOS CAP |
|---|---|---|---|
| Queen's Pawn Opening | 1.d4 | E00.001.IQ | |
| Polish Defence | 1.d4 b5 | E00.002.IQ | Explore ▶ |
| Polish Defence: Spassky's Gambit Accepted | 1.d4 b5 2.e4 Bb7 3.Bxb5 | E00.003.IQ | Explore ▶ |
| Queen's Fianchetto | 1.d4 b6 | E00.004.IQ | Explore ▶ |
| English Defence: Eastbourne Gambit | 1.d4 b6 2.c4 Bb7 3.Nc3 e5 | E00.005.IQ | Explore ▶ |
| Blumenfeld-Hiva Gambit Defence | 1.d4 b6 2.c4 c5 3.d5 e6 4.e4 b5 5.cxb5 f5 | E00.006.IQ | Explore ▶ |
| Anglo-Slav Defence | 1.d4 c6 2.c4 d6 | E00.007.IQ | Explore ▶ |
| Rat Defence | 1.d4 d6 | E00.008.IQ | Explore ▶ |
| Old Indian Defence | 1.d4 d6 2.c4 | E00.009.IQ | Explore ▶ |
| Rat Defence: English Rat | 1.d4 d6 2.c4 e5 | E00.010.IQ | Explore ▶ |
| English Rat: Pounds Gambit | 1.d4 d6 2.c4 e5 3.dxe5 Be6 | E00.011.IQ | Explore ▶ |
| Rat Defence: English Rat - Lisbon Gambit | 1.d4 d6 2.c4 e5 3.dxe5 Nc6 | E00.012.IQ | Explore ▶ |
| Wade Defence | 1.d4 d6 2.Nf3 Bg4 | E00.013.IQ | Explore ▶ |
| Horwitz Defence | 1.d4 e6 | E00.014.IQ | Explore ▶ |
| Queen's Pawn: Franco Indian Defence | 1.d4 e6 2.c4 | E00.015.IQ | Explore ▶ |
| Kangaroo Defence | 1.d4 e6 2.c4 Bb4+ | E00.016.IQ | Explore ▶ |
| Kangaroo Defence: Keres Defence - Transpositional Attack | 1.d4 e6 2.c4 Bb4+ 3.Nc3 | E00.017.IQ | Explore ▶ |
| Borg Defence: Borg Gambit | 1.d4 g5 | E00.018.IQ | Explore ▶ |
| Borg Defence: Borg Gambit Accepted | 1.d4 g5 2.Bxg5 | E00.019.IQ | Explore ▶ |
| Australian Defence | 1.d4 Na6 | E00.020.IQ | Explore ▶ |
| Mikenas Defence | 1.d4 Nc6 | E00.021.IQ | Explore ▶ |
| Mikenas Defence: Lithuanian Defence | 1.d4 Nc6 2.c4 e5 3.d5 Nce7 | E00.022.IQ | Explore ▶ |
| Mikenas Defence: Cannstatter Defence | 1.d4 Nc6 2.c4 e5 3.d5 Nd4 | E00.023.IQ | Explore ▶ |
| Mikenas Defence: Pozarek Gambit | 1.d4 Nc6 2.c4 e5 3.dxe5 Nxe5 4.Nc3 Nxc4 | E00.024.IQ | Explore ▶ |
| Montevideo Defence | 1.d4 Nc6 2.d5 Nb8 | E00.025.IQ | Explore ▶ |
| Zaire Defence | 1.d4 Nc6 2.d5 Nb8 3.e4 Nf6 4.e5 Ng8 | E00.026.IQ | Explore ▶ |
| Sub Groups | Chess Notation | MICOS CAP |
|---|---|---|
| Irregular Queen's Defences (E00.IQ) | ||
| 132. Mikenas Defence | 1.d4 Nc6 | E00.021.IQ 🖥️ |
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