Source Lichess
Black wins at least 27.0 more of every 100 games than it loses
how far wins run ahead of losses, 90% confident
At All Ratings, Ruy Lopez: Marshall Attack, Original Marshall Attack keeps Black's wins running +27.0% ahead of its losses at worst, 90% confident, from 21K Lichess games. This gambit is effective. Win rate, draw rate and loss rate come from games played December 2023 to November 2025.
| Rating | Edge at worst | Black Win | Draw | Black Loss | Games |
|---|---|---|---|---|---|
| 1200-1399 | +10.8% | 61.0% | 0.8% | 38.2% | 178 |
| 1400-1599 | +19.6% | 62.3% | 1.3% | 36.4% | 638 |
| 1600-1799 | +25.4% | 63.2% | 2.2% | 34.6% | 2.5K |
| 1800-1999 | +28.9% | 64.0% | 2.9% | 33.1% | 6.3K |
| 2000-2199 | +25.7% | 62.0% | 3.6% | 34.4% | 7.3K |
| 2200-2499 | +23.0% | 60.6% | 4.4% | 35.0% | 3.5K |
| 2500+ | +8.3% | 53.7% | 9.8% | 36.5% | 329 |
The games never stop proving it. Black comes out ahead at every rating we can see.
Black wins 62.4% of Ruy Lopez: Marshall Attack, Original Marshall Attack games, draws 3.3% and loses 34.3%. That rests on 21K games from Lichess.
1800-1999. There Black wins at least 28.9 more of every 100 games than it loses (90% confident), its highest Edge at worst.
Blitz. For Black, the Edge at worst — how far wins run ahead of losses, 90% confident — is +27.1% in Blitz (13K games) and +17.8% in Rapid (2.8K games).
Yes. The first rating where the games do not show Black coming out ahead is 1200-1399 in Blitz. In Bullet and Rapid, Black comes out ahead at every rating we can see.
The Ruy Lopez: Marshall Attack, Original Marshall Attack is extremely sharp: 3.3% of its games are drawn, so 96.7% end with a winner.
Play it. Black comes out ahead at every rating we can see.
This one is hard to meet at every level. As White, develop fast, castle early, trade pieces, and do not get greedy with the extra material. If sharp positions are not your game, decline it.
This rests on 21K games from Lichess. Every figure carries the range it is in, 90% confident, and the table above shows how many games sit behind each rating and each clock — the fewer there are, the wider that range.