Source Lichess
White wins at least 16.7 more of every 100 games than it loses
how far wins run ahead of losses, 90% confident
At All Ratings, King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit keeps White's wins running +16.7% ahead of its losses at worst, 90% confident, from 1.5K 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 | White Win | Draw | White Loss | Games |
|---|---|---|---|---|---|
| 1800-1999 | +6.3% | 60.5% | 3.0% | 36.5% | 82 |
| 2000-2199 | +7.8% | 58.1% | 1.2% | 40.7% | 285 |
| 2200-2499 | +14.9% | 58.2% | 4.1% | 37.7% | 824 |
| 2500+ | +13.4% | 58.5% | 5.6% | 35.9% | 309 |
The games never stop proving it. White comes out ahead at every rating we can see.
White wins 58.6% of King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit games, draws 3.7% and loses 37.7%. That rests on 1.5K games from Lichess.
2200-2499. There White wins at least 14.9 more of every 100 games than it loses (90% confident), its highest Edge at worst.
Blitz. For White, the Edge at worst — how far wins run ahead of losses, 90% confident — is +15.7% in Blitz (1.1K games) and −5.4% in Rapid (70 games).
No. In Bullet and Blitz, White comes out ahead at every rating we can see.
The King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit is extremely sharp: 3.7% of its games are drawn, so 96.3% end with a winner.
Play it. White comes out ahead at every rating we can see.
This one is hard to meet at every level. As Black, 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 1.5K 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.