Chessy
Mieses Opening: Reversed Rat – g3 for Black
The Mieses Opening: Reversed Rat (1.d3 e5 2.g3 d5) might look like White is playing a quiet, harmless system — but don't let the modest start fool you. In the resulting position, you have a perfectly solid game ahead of you. Stockfish rates the position at -0.18, a tiny edge for Black (so you are very slightly better right out of the opening). Across nearly half a million games in the Lichess database, Black actually wins 47.2% of the time — nearly as often as White. The drill below will help you navigate the most common replies and spot the one mistake White can make that hands you an immediate edge.
Play the Mieses Opening: Reversed Rat: g3 against the engine
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The position is set — test your skills against the adaptive engine below. Practice spotting the e3 mistake and learn the natural developing plans that make this
Create a free account →The Big Picture: What You're Fighting For
After 1.d3 e5 2.g3 d5, you've already claimed space in the centre with your e- and d-pawns, while White has committed to a quiet fianchetto setup. White's most popular move here is Bg2 (played in 338,210 games), which simply develops and eyes your d5-pawn. Your job is straightforward: develop your pieces naturally, keep your centre healthy, and enjoy the fact that the statistics are dead even. White wins 48.6% of the time, Black wins 47.2%, and draws are rare at 4.2%. This is a position where understanding plans matters more than memorising long lines.
The Critical Moment: When White Plays e3
White's e3 is played in over 13,500 games — and according to the engine, it's a mistake. The evaluation says e3 loses about 0.5 pawns of advantage compared to the better move Nf3. Why? Because e3 blocks White's dark-squared bishop and does nothing to challenge your centre. After e3, you should be happy: you can continue with natural development like Nc6, Bd6, or Nf6, and you'll have a comfortable game. The engine's recommended line instead is Nf3 Bd6 e4 dxe4 — White fights for central space immediately, which is more ambitious and keeps the game sharp. If your opponent chooses e3, they've told you they don't know the best plan here.
The Engine's Best Answer: Meeting Nf3
If White does find the strongest move — Nf3 (73,383 games, White scores 50.4%) — the engine suggests a concrete follow-up: Bd6, preparing to castle and keeping an eye on the e3-square. White will likely continue with e4, challenging your pawn centre. You capture with dxe4, and after dxe4 you have a solid French-like pawn structure with your pawns on e4 and e5. Black scores nearly as well as White in this line, so there's nothing to fear. Just develop, castle kingside, and aim to complete your development before launching any attacks.
Most Common Continuations at a Glance
Here are the most-played moves for White after 1.d3 e5 2.g3 d5, with their win rates. Black's results are consistent across them all — no line is crushing Black. That's the beauty of this opening: you steer the game toward a slow, strategic fight where your solid centre gives you equal chances. - Bg2 (338,210 games, White scores 49.1%) — the fianchetto, a natural developing move. Develop and castle. - Nf3 (73,383 games, White scores 50.4%) — White's best try. Answer with Bd6 and be ready for e4. - e3 (13,524 games, White scores 47.3%) — an inaccuracy. Proceed confidently. - b3 (11,538 games, White scores 46.5%), c3 (8,510 games, White scores 46.8%), Nd2 (7,765 games, White scores 48.3%) — all quieter options where you can simply develop, maintain your centre, and aim for a comfortable middlegame.
Results across 489,350 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Bg2 | 338,210 | 49.1% |
| Nf3 | 73,383 | 50.4% |
| e3 | 13,524 | 47.3% |
| b3 | 11,538 | 46.5% |
| c3 | 8,510 | 46.8% |
| Nd2 | 7,765 | 48.3% |
Frequently asked questions
Is the Mieses Opening: Reversed Rat (g3) sound for Black?
Absolutely. The position after 1.d3 e5 2.g3 d5 is rated -0.18 by Stockfish, giving Black a microscopic edge. With Black winning 47.2% of games and White winning 48.6%, it's as balanced as an opening can get.
What should I do if White plays e3 in this opening?
e3 is a known inaccuracy that loses about 0.5 pawns of advantage for White. Continue developing naturally with moves like Nc6, Bd6, or Nf6. The statistics show White scores only 47.3% after e3, which is below average — so you are slightly better.
What is the best move for White after 1.d3 e5 2.g3 d5?
According to the engine, White's best move is Nf3, preparing e4 to challenge your pawn centre. After Nf3 Bd6 e4 dxe4, the game opens up a bit, but Black remains perfectly fine. There's no reason to fear this line.
How do I play against White's most common move Bg2?
After Bg2 (played in over 338,000 games), simply develop your pieces. Your centre with pawns on d5 and e5 is already strong. Play Nc6, Nf6, Bd6, castle kingside, and aim for a healthy middlegame. White scores only 49.1% from this position, so you have equal chances.