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Petrov's Defense: Cochrane Gambit, Bishop Check Line

57K games from Lichess · Updated January 2026

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Analyze this line move by move

White expected score · All ratings · All speeds

51.1%

45%55%
Floor50.8%

the worst score you would still get, 90% confident. At best 51.4%.

Measured over 57K games at this level and clock.

Playablewins about as often as it loses at this level

Roughly even — the middlegame decides more than this opening choice does.

Outcomes for White

Draw 3.3 · Score = win + ½ of the draws · 57K games

Rank among the families White can choose here
not ranked — this is a variation, not a family
Games in this context
57K
Best context
56.4% at 1000-1199 Rapid
Worst context
48.0% at 1600-1799 Bullet
Average game length
31 moves
Games that end decisively
96.7%
Draws
3.3%

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

Gambit BreakpointWhite

Peak: +5.7% · Breakpoint: 1400-1599

Traps & Chaos

Complexity: 94.1 · Trap factor: +21.1 · 57K games

Where it holds · White score by rating × clock

Green is clearly ahead for White, grey is around even, red is behind. Tap a cell to measure there, and again to clear. It holds about the same all the way up, near 49.0%.

RatingUBBulleBlitzRapidClass
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

  • 0-999 rating, UltraBullet: 50.0% expected score (6 games)
  • 0-999 rating, Bullet: 52.3% expected score (1,051 games)
  • 0-999 rating, Blitz: 52.6% expected score (2,019 games)
  • 0-999 rating, Rapid: 50.8% expected score (1,097 games)
  • 0-999 rating, Classical: 39.5% expected score (8 games)
  • 1000-1199 rating, UltraBullet: 50.0% expected score (6 games)
  • 1000-1199 rating, Bullet: 51.6% expected score (1,544 games)
  • 1000-1199 rating, Blitz: 53.9% expected score (3,457 games)
  • 1000-1199 rating, Rapid: 56.4% expected score (1,403 games)
  • 1000-1199 rating, Classical: 58.9% expected score (38 games)
  • 1200-1399 rating, UltraBullet: 57.8% expected score (37 games)
  • 1200-1399 rating, Bullet: 50.5% expected score (1,813 games)
  • 1200-1399 rating, Blitz: 52.2% expected score (4,775 games)
  • 1200-1399 rating, Rapid: 54.3% expected score (2,146 games)
  • 1200-1399 rating, Classical: 69.2% expected score (61 games)
  • 1400-1599 rating, UltraBullet: 59.8% expected score (85 games)
  • 1400-1599 rating, Bullet: 51.0% expected score (2,197 games)
  • 1400-1599 rating, Blitz: 49.2% expected score (5,825 games)
  • 1400-1599 rating, Rapid: 51.0% expected score (2,468 games)
  • 1400-1599 rating, Classical: 48.8% expected score (122 games)
  • 1600-1799 rating, UltraBullet: 57.1% expected score (34 games)
  • 1600-1799 rating, Bullet: 48.0% expected score (2,197 games)
  • 1600-1799 rating, Blitz: 50.9% expected score (6,068 games)
  • 1600-1799 rating, Rapid: 49.0% expected score (2,149 games)
  • 1600-1799 rating, Classical: 39.2% expected score (118 games)
  • 1800-1999 rating, UltraBullet: 55.2% expected score (212 games)
  • 1800-1999 rating, Bullet: 52.7% expected score (2,329 games)
  • 1800-1999 rating, Blitz: 50.4% expected score (4,982 games)
  • 1800-1999 rating, Rapid: 49.2% expected score (1,522 games)
  • 1800-1999 rating, Classical: 44.6% expected score (72 games)
  • 2000-2199 rating, UltraBullet: 53.3% expected score (60 games)
  • 2000-2199 rating, Bullet: 50.8% expected score (1,487 games)
  • 2000-2199 rating, Blitz: 48.9% expected score (2,751 games)
  • 2000-2199 rating, Rapid: 49.7% expected score (518 games)
  • 2000-2199 rating, Classical: 31.9% expected score (4 games)
  • 2200-2499 rating, UltraBullet: 62.8% expected score (22 games)
  • 2200-2499 rating, Bullet: 48.8% expected score (910 games)
  • 2200-2499 rating, Blitz: 52.7% expected score (736 games)
  • 2200-2499 rating, Rapid: 61.5% expected score (86 games)
  • 2500+ rating, Bullet: 47.0% expected score (132 games)
  • 2500+ rating, Blitz: 50.0% expected score (13 games)

Related Openings

Parent
Petrov's Defense
49.1%
Variations (5)
Petrov's Defense: Three Knights Game
50.2%
Petrov's Defense: Italian Variation
50.9%
Petrov's Defense: Stafford Gambit
46.5%
Petrov's Defense: Modern Attack
51.5%
Petrov's Defense: Damiano Variation
58.6%
Analyze Petrov's Defense: Cochrane Gambit, Bishop Check Line PositionsSee what each move is worth at your rating, move by move

Methodology

Across every rating and clock, the Petrov's Defense: Cochrane Gambit, Bishop Check Line scores 51.1% for White — we are 90% confident the real figure is between 50.8% and 51.4% — from 57K 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
57K+ 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 Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate?

Playing the Petrov's Defense: Cochrane Gambit, Bishop Check Line, White wins 49.4%, draws 3.3% and loses 47.3%. Counting a draw as half a point, that is an Expected Score of 51.1%. It rests on 57K rated games from Lichess.

At what rating does the Petrov's Defense: Cochrane Gambit, Bishop Check Line perform best?

The Petrov's Defense: Cochrane Gambit, Bishop Check Line performs best for White at 1000-1199, with an Expected Score of 53.9% (6.4K games) and the highest Floor of any rating with enough games to read.

Is the Petrov's Defense: Cochrane Gambit, Bishop Check Line better in blitz or rapid?

For White, the Petrov's Defense: Cochrane Gambit, Bishop Check Line scores about the same in both: an Expected Score of 51.0% in Blitz (31K games) against 51.7% in Rapid (11K games).

How sharp is the Petrov's Defense: Cochrane Gambit, Bishop Check Line?

The Petrov's Defense: Cochrane Gambit, Bishop Check Line has a sharpness score of 96.7 (very decisive), meaning 96.7% of games end decisively. Average game length is 31 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 0-999?

At 0-999, White wins 50.1%, draws 3.6% and loses 46.2%. Counting a draw as half a point, that is an Expected Score of 52.0%. It rests on 4.2K Lichess games, which average 26 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 1000-1199?

At 1000-1199, White wins 52.4%, draws 3.0% and loses 44.6%. Counting a draw as half a point, that is an Expected Score of 53.9%. It rests on 6.4K Lichess games, which average 28 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 1200-1399?

At 1200-1399, White wins 51.1%, draws 2.8% and loses 46.1%. Counting a draw as half a point, that is an Expected Score of 52.5%. It rests on 8.8K Lichess games, which average 29 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 1400-1599?

At 1400-1599, White wins 48.5%, draws 3.1% and loses 48.4%. Counting a draw as half a point, that is an Expected Score of 50.1%. It rests on 11K Lichess games, which average 31 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 1600-1799?

At 1600-1799, White wins 48.0%, draws 3.6% and loses 48.4%. Counting a draw as half a point, that is an Expected Score of 49.8%. It rests on 11K Lichess games, which average 33 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 1800-1999?

At 1800-1999, White wins 49.1%, draws 3.3% and loses 47.5%. Counting a draw as half a point, that is an Expected Score of 50.8%. It rests on 9.1K Lichess games, which average 34 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 2000-2199?

At 2000-2199, White wins 47.5%, draws 4.2% and loses 48.3%. Counting a draw as half a point, that is an Expected Score of 49.6%. It rests on 4.8K Lichess games, which average 35 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 2200-2499?

At 2200-2499, White wins 49.2%, draws 4.0% and loses 46.8%. Counting a draw as half a point, that is an Expected Score of 51.2%. It rests on 1.8K Lichess games, which average 36 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate at 2500+?

At 2500+, White wins 42.7%, draws 9.2% and loses 48.1%. Counting a draw as half a point, that is an Expected Score of 47.3%. It rests on 145 Lichess games, which average 38 moves.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate in UltraBullet?

In UltraBullet, White wins 55.3%, draws 2.3% and loses 42.4%. Counting a draw as half a point, that is an Expected Score of 56.5%. It rests on 462 Lichess games.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate in Bullet?

In Bullet, White wins 49.4%, draws 2.4% and loses 48.1%. Counting a draw as half a point, that is an Expected Score of 50.7%. It rests on 14K Lichess games.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate in Blitz?

In Blitz, White wins 49.2%, draws 3.5% and loses 47.3%. Counting a draw as half a point, that is an Expected Score of 51.0%. It rests on 31K Lichess games.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate in Rapid?

In Rapid, White wins 49.6%, draws 4.2% and loses 46.3%. Counting a draw as half a point, that is an Expected Score of 51.7%. It rests on 11K Lichess games.

What is the Petrov's Defense: Cochrane Gambit, Bishop Check Line win rate in Classical?

In Classical, White wins 47.9%, draws 1.8% and loses 50.3%. Counting a draw as half a point, that is an Expected Score of 48.8%. It rests on 423 Lichess games.

Is the Petrov's Defense: Cochrane Gambit, Bishop Check Line a good opening?

The Petrov's Defense: Cochrane Gambit, Bishop Check Line is about level. Across all ratings, White wins 49.4% of its games and loses 47.3%. It performs best at 1000-1199. Your results depend on your rating, time control, and how well you know the typical plans.