Ruy Lopez: Cozio Defense, Tartakower Gambit
314 games from Lichess · Updated January 2026
Black expected score · All ratings · All speeds
46.6%
the worst score you would still get, 90% confident. At best 51.2%.
Measured over 314 games at this level and clock.
Black comes out behind here — there are better weapons in the list.
Outcomes for Black
Draw 6.5 · Score = win + ½ of the draws · 314 games
- Rank among the families Black can choose here
- not ranked — this is a variation, not a family
- Games in this context
- 314
- Best context
- not measured yet
- Average game length
- 34 moves
- Games that end decisively
- 93.5%
- Draws
- 6.5%
Best and worst are the strongest and weakest squares with at least 500 games behind them. The table further down shows every square, including thinner ones.
Extra Analysis
Deep-dive datasets for this opening
Where it holds · Black score by rating × clock
Green is clearly ahead for Black, grey is around even, red is behind. Tap a cell to measure there, and again to clear. It falls away as the rating rises: 43.4% at 1200-1399, 36.3% at 2500+.
| Rating | UB | Bulle | Blitz | Rapid | Class |
|---|---|---|---|---|---|
| 0-999 | — | — | — | — | — |
| 1000-1199 | — | — | — | — | — |
| 1200-1399 | — | — | |||
| 1400-1599 | — | — | — | ||
| 1600-1799 | — | — | |||
| 1800-1999 | — | — | |||
| 2000-2199 | — | ||||
| 2200-2499 | — | — | |||
| 2500+ | — | — | — |
Expected score matrix by rating bracket and time control
- 1200-1399 rating, Bullet: 61.2% expected score (3 games)
- 1200-1399 rating, Blitz: 38.9% expected score (3 games)
- 1200-1399 rating, Rapid: 30.0% expected score (1 games)
- 1400-1599 rating, Bullet: 70.0% expected score (1 games)
- 1400-1599 rating, Blitz: 34.0% expected score (11 games)
- 1600-1799 rating, Bullet: 32.4% expected score (7 games)
- 1600-1799 rating, Blitz: 62.0% expected score (11 games)
- 1600-1799 rating, Rapid: 64.3% expected score (2 games)
- 1800-1999 rating, Bullet: 79.5% expected score (7 games)
- 1800-1999 rating, Blitz: 43.0% expected score (34 games)
- 1800-1999 rating, Rapid: 50.0% expected score (4 games)
- 2000-2199 rating, Bullet: 76.1% expected score (10 games)
- 2000-2199 rating, Blitz: 48.4% expected score (59 games)
- 2000-2199 rating, Rapid: 50.0% expected score (11 games)
- 2000-2199 rating, Classical: 21.5% expected score (2 games)
- 2200-2499 rating, Bullet: 50.0% expected score (16 games)
- 2200-2499 rating, Blitz: 43.4% expected score (81 games)
- 2200-2499 rating, Rapid: 53.5% expected score (13 games)
- 2500+ rating, Bullet: 37.8% expected score (23 games)
- 2500+ rating, Blitz: 34.9% expected score (15 games)
Related Openings
Methodology
Across every rating and clock, the Ruy Lopez: Cozio Defense, Tartakower Gambit scores 46.6% for Black — we are 90% confident the real figure is between 41.9% and 51.2% — from 314 Lichess games. Win rate, draw rate and loss rate come from games played December 2023 to November 2025.
How the figures are made
- Whose games these are
- 314+ rated games played on Lichess (2023-12 to 2025-11). The games are Lichess’s and free for anyone to use. What is ours is the reading of them. Last rebuilt January 2026.
- Which games we count
- Rated games only — nothing casual.
- Both players within 200 rating points of each other. A mismatch tells you about the gap, not about the opening.
- At least 2 moves played.
- A game is filed under White’s rating.
- Why every number comes with a range
- A number off a few hundred games is a guess. The same number off millions is a fact. The range is what tells them apart, and it is what the lists rank on — so an opening cannot reach the top on a lucky run of forty games. The more games behind a figure, the narrower its range.
- How much we need before we say anything
- An opening page needs 100 games. A gambit needs 50 games at a rating before we will say whether it pays there. The chaos and trap lists need 500 games overall and 250 games at one rating or clock.
Frequently Asked Questions
What is the Ruy Lopez: Cozio Defense, Tartakower Gambit win rate?
Playing the Ruy Lopez: Cozio Defense, Tartakower Gambit, Black wins 43.3%, draws 6.5% and loses 50.2%. Counting a draw as half a point, that is an Expected Score of 46.6%. It rests on 314 rated games from Lichess.
At what rating does the Ruy Lopez: Cozio Defense, Tartakower Gambit perform best?
The Ruy Lopez: Cozio Defense, Tartakower Gambit performs best for Black at 2000-2199, with an Expected Score of 51.2% (82 games) and the highest Floor of any rating with enough games to read.
How sharp is the Ruy Lopez: Cozio Defense, Tartakower Gambit?
The Ruy Lopez: Cozio Defense, Tartakower Gambit has a sharpness score of 93.5 (decisive), meaning 93.5% of games end decisively. Average game length is 34 moves.
What is the Ruy Lopez: Cozio Defense, Tartakower Gambit win rate at 2200-2499?
At 2200-2499, Black wins 42.6%, draws 5.8% and loses 51.6%. Counting a draw as half a point, that is an Expected Score of 45.5%. It rests on 110 Lichess games, which average 37 moves.
What is the Ruy Lopez: Cozio Defense, Tartakower Gambit win rate in Blitz?
In Blitz, Black wins 41.1%, draws 6.3% and loses 52.7%. Counting a draw as half a point, that is an Expected Score of 44.2%. It rests on 214 Lichess games.
Is the Ruy Lopez: Cozio Defense, Tartakower Gambit a good opening?
The Ruy Lopez: Cozio Defense, Tartakower Gambit is hard work for Black — it favours White. Across all ratings, Black wins 43.3% of its games and loses 50.2%. It performs best at 2000-2199. Your results depend on your rating, time control, and how well you know the typical plans.