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Bird Opening: Mujannah

20K games from Lichess · Updated January 2026

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Analyze this line move by move

White expected score · All ratings · All speeds

48.7%

45%55%
Floor48.1%

the worst score you would still get, 90% confident. At best 49.3%.

Measured over 20K 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 4.4 · Score = win + ½ of the draws · 20K games

Rank among the families White can choose here
not ranked — this is a variation, not a family
Games in this context
20K
Best context
54.3% at 2000-2199 Rapid
Worst context
43.5% at 1400-1599 Bullet
Average game length
34 moves
Games that end decisively
95.6%
Draws
4.4%

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

Time-Control Swing

Max swing: 10.6% · UltraBullet best · Classical worst

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 gets better as the rating rises: 40.1% at 0-999, 58.1% at 2500+.

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: 30.0% expected score (1 games)
  • 0-999 rating, Bullet: 45.6% expected score (372 games)
  • 0-999 rating, Blitz: 45.2% expected score (895 games)
  • 0-999 rating, Rapid: 40.2% expected score (469 games)
  • 0-999 rating, Classical: 39.5% expected score (8 games)
  • 1000-1199 rating, UltraBullet: 21.5% expected score (2 games)
  • 1000-1199 rating, Bullet: 49.7% expected score (546 games)
  • 1000-1199 rating, Blitz: 46.2% expected score (697 games)
  • 1000-1199 rating, Rapid: 43.3% expected score (389 games)
  • 1000-1199 rating, Classical: 52.3% expected score (20 games)
  • 1200-1399 rating, UltraBullet: 41.3% expected score (10 games)
  • 1200-1399 rating, Bullet: 46.7% expected score (613 games)
  • 1200-1399 rating, Blitz: 50.8% expected score (939 games)
  • 1200-1399 rating, Rapid: 44.4% expected score (316 games)
  • 1200-1399 rating, Classical: 41.3% expected score (33 games)
  • 1400-1599 rating, UltraBullet: 24.2% expected score (14 games)
  • 1400-1599 rating, Bullet: 43.5% expected score (697 games)
  • 1400-1599 rating, Blitz: 45.3% expected score (1,243 games)
  • 1400-1599 rating, Rapid: 43.7% expected score (477 games)
  • 1400-1599 rating, Classical: 37.4% expected score (46 games)
  • 1600-1799 rating, UltraBullet: 50.0% expected score (18 games)
  • 1600-1799 rating, Bullet: 48.5% expected score (1,040 games)
  • 1600-1799 rating, Blitz: 50.9% expected score (2,028 games)
  • 1600-1799 rating, Rapid: 50.1% expected score (487 games)
  • 1600-1799 rating, Classical: 49.0% expected score (48 games)
  • 1800-1999 rating, UltraBullet: 64.3% expected score (9 games)
  • 1800-1999 rating, Bullet: 50.1% expected score (1,145 games)
  • 1800-1999 rating, Blitz: 50.0% expected score (2,428 games)
  • 1800-1999 rating, Rapid: 51.0% expected score (587 games)
  • 1800-1999 rating, Classical: 46.4% expected score (40 games)
  • 2000-2199 rating, UltraBullet: 62.4% expected score (59 games)
  • 2000-2199 rating, Bullet: 51.2% expected score (1,239 games)
  • 2000-2199 rating, Blitz: 49.7% expected score (1,000 games)
  • 2000-2199 rating, Rapid: 54.3% expected score (525 games)
  • 2000-2199 rating, Classical: 47.2% expected score (16 games)
  • 2200-2499 rating, UltraBullet: 83.4% expected score (3 games)
  • 2200-2499 rating, Bullet: 50.4% expected score (933 games)
  • 2200-2499 rating, Blitz: 50.0% expected score (391 games)
  • 2200-2499 rating, Rapid: 53.0% expected score (32 games)
  • 2200-2499 rating, Classical: 46.3% expected score (12 games)
  • 2500+ rating, Bullet: 59.4% expected score (191 games)
  • 2500+ rating, Blitz: 50.0% expected score (65 games)
  • 2500+ rating, Rapid: 55.4% expected score (17 games)
  • 2500+ rating, Classical: 67.7% expected score (7 games)

Related Openings

Parent
Bird Opening
50.1%
Variations (5)
Bird Opening: Dutch Variation
50.5%
Bird Opening: From's Gambit
48.6%
Bird Opening: Williams Gambit
47.0%
Bird Opening: Schlechter Gambit
50.6%
Bird Opening: Lasker Variation
51.9%
Analyze Bird Opening: Mujannah PositionsSee what each move is worth at your rating, move by move

Methodology

Across every rating and clock, the Bird Opening: Mujannah scores 48.7% for White — we are 90% confident the real figure is between 48.1% and 49.3% — from 20K 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
20K+ 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 Bird Opening: Mujannah win rate?

Playing the Bird Opening: Mujannah, White wins 46.5%, draws 4.4% and loses 49.2%. Counting a draw as half a point, that is an Expected Score of 48.7%. It rests on 20K rated games from Lichess.

At what rating does the Bird Opening: Mujannah perform best?

The Bird Opening: Mujannah performs best for White at 2500+, with an Expected Score of 57.3% (280 games) and the highest Floor of any rating with enough games to read.

Is the Bird Opening: Mujannah better in blitz or rapid?

For White, the Bird Opening: Mujannah scores higher in Blitz: an Expected Score of 48.9% in Blitz (9.7K games) against 47.3% in Rapid (3.3K games).

How sharp is the Bird Opening: Mujannah?

The Bird Opening: Mujannah has a sharpness score of 95.6 (very decisive), meaning 95.6% of games end decisively. Average game length is 34 moves.

What is the Bird Opening: Mujannah win rate at 0-999?

At 0-999, White wins 41.6%, draws 4.6% and loses 53.9%. Counting a draw as half a point, that is an Expected Score of 43.9%. It rests on 1.7K Lichess games, which average 28 moves.

What is the Bird Opening: Mujannah win rate at 1000-1199?

At 1000-1199, White wins 45.2%, draws 3.0% and loses 51.9%. Counting a draw as half a point, that is an Expected Score of 46.7%. It rests on 1.7K Lichess games, which average 29 moves.

What is the Bird Opening: Mujannah win rate at 1200-1399?

At 1200-1399, White wins 46.9%, draws 2.5% and loses 50.6%. Counting a draw as half a point, that is an Expected Score of 48.2%. It rests on 1.9K Lichess games, which average 30 moves.

What is the Bird Opening: Mujannah win rate at 1400-1599?

At 1400-1599, White wins 42.5%, draws 3.3% and loses 54.2%. Counting a draw as half a point, that is an Expected Score of 44.2%. It rests on 2.5K Lichess games, which average 31 moves.

What is the Bird Opening: Mujannah win rate at 1600-1799?

At 1600-1799, White wins 48.4%, draws 3.4% and loses 48.2%. Counting a draw as half a point, that is an Expected Score of 50.1%. It rests on 3.6K Lichess games, which average 34 moves.

What is the Bird Opening: Mujannah win rate at 1800-1999?

At 1800-1999, White wins 48.2%, draws 3.8% and loses 48.0%. Counting a draw as half a point, that is an Expected Score of 50.1%. It rests on 4.2K Lichess games, which average 36 moves.

What is the Bird Opening: Mujannah win rate at 2000-2199?

At 2000-2199, White wins 49.1%, draws 4.7% and loses 46.2%. Counting a draw as half a point, that is an Expected Score of 51.5%. It rests on 2.8K Lichess games, which average 37 moves.

What is the Bird Opening: Mujannah win rate at 2200-2499?

At 2200-2499, White wins 48.4%, draws 4.0% and loses 47.5%. Counting a draw as half a point, that is an Expected Score of 50.5%. It rests on 1.4K Lichess games, which average 37 moves.

What is the Bird Opening: Mujannah win rate at 2500+?

At 2500+, White wins 30.4%, draws 53.8% and loses 15.8%. Counting a draw as half a point, that is an Expected Score of 57.3%. It rests on 280 Lichess games, which average 58 moves.

What is the Bird Opening: Mujannah win rate in UltraBullet?

In UltraBullet, White wins 52.3%, draws 2.1% and loses 45.5%. Counting a draw as half a point, that is an Expected Score of 53.4%. It rests on 116 Lichess games.

What is the Bird Opening: Mujannah win rate in Bullet?

In Bullet, White wins 47.0%, draws 4.1% and loses 48.9%. Counting a draw as half a point, that is an Expected Score of 49.1%. It rests on 6.8K Lichess games.

What is the Bird Opening: Mujannah win rate in Blitz?

In Blitz, White wins 46.9%, draws 4.0% and loses 49.1%. Counting a draw as half a point, that is an Expected Score of 48.9%. It rests on 9.7K Lichess games.

What is the Bird Opening: Mujannah win rate in Rapid?

In Rapid, White wins 44.4%, draws 5.8% and loses 49.8%. Counting a draw as half a point, that is an Expected Score of 47.3%. It rests on 3.3K Lichess games.

What is the Bird Opening: Mujannah win rate in Classical?

In Classical, White wins 41.7%, draws 7.1% and loses 51.2%. Counting a draw as half a point, that is an Expected Score of 45.3%. It rests on 230 Lichess games.

Is the Bird Opening: Mujannah a good opening?

The Bird Opening: Mujannah is about level. Across all ratings, White wins 46.5% of its games and loses 49.2%. It performs best at 2500+. Your results depend on your rating, time control, and how well you know the typical plans.