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Analyzer

Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation

2.6K games from Lichess · Updated January 2026

Playable
White Expected Score50.7%Range (90% confident): 49.1% – 52.3%Based on 2.6K games
0%50.7%100%
Range (90% confident): 49.1% – 52.3%
Outcome Distribution
46.4%8.6%45.1%
Win
Draw
Loss
No position data
Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation
n=2.6K
Avg Length39 moves
Sharpness91%
Draw Rate8.6%

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation expected score for White?

Snapshot

At all ratings, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 50.7% expected score for White (we're 90% confident it's between 49.1% and 52.3%), based on 2.6K Lichess games.

White Win% by Rating

Declines with rating: 60% → 48%

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 60.0% win rate (1 games)
  • 1000-1199: 60.0% win rate (1 games)
  • 1200-1399: 33.3% win rate (3 games)
  • 1400-1599: 44.2% win rate (20 games)
  • 1600-1799: 39.8% win rate (45 games)
  • 1800-1999: 49.8% win rate (108 games)
  • 2000-2199: 46.3% win rate (406 games)
  • 2200-2499: 45.7% win rate (1,425 games)
  • 2500+: 47.8% win rate (638 games)

White Win% by Time Control

Best in Rapid (50%), worst in Classical (30%)

Bullet
Blitz
Rapid
Classical

  • Bullet: 44.4% win rate (482 games)
  • Blitz: 46.7% win rate (2,039 games)
  • Rapid: 49.8% win rate (116 games)
  • Classical: 30.4% win rate (10 games)

White% by Rating × Time Control

Click any cell to filter. Green = above 50%, Red = below 50%.

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, Bullet: 70.0% expected score (1 games)
  • 1000-1199 rating, Rapid: 70.0% expected score (1 games)
  • 1200-1399 rating, Bullet: 30.0% expected score (1 games)
  • 1200-1399 rating, Blitz: 50.0% expected score (2 games)
  • 1400-1599 rating, Bullet: 70.0% expected score (1 games)
  • 1400-1599 rating, Blitz: 40.9% expected score (15 games)
  • 1400-1599 rating, Rapid: 59.1% expected score (4 games)
  • 1600-1799 rating, Bullet: 58.7% expected score (10 games)
  • 1600-1799 rating, Blitz: 42.5% expected score (25 games)
  • 1600-1799 rating, Rapid: 50.0% expected score (8 games)
  • 1600-1799 rating, Classical: 35.7% expected score (2 games)
  • 1800-1999 rating, Bullet: 54.9% expected score (29 games)
  • 1800-1999 rating, Blitz: 50.0% expected score (69 games)
  • 1800-1999 rating, Rapid: 65.8% expected score (8 games)
  • 1800-1999 rating, Classical: 64.3% expected score (2 games)
  • 2000-2199 rating, Bullet: 52.3% expected score (85 games)
  • 2000-2199 rating, Blitz: 48.2% expected score (300 games)
  • 2000-2199 rating, Rapid: 62.2% expected score (19 games)
  • 2000-2199 rating, Classical: 50.0% expected score (2 games)
  • 2200-2499 rating, Bullet: 43.1% expected score (200 games)
  • 2200-2499 rating, Blitz: 50.9% expected score (1,160 games)
  • 2200-2499 rating, Rapid: 50.8% expected score (61 games)
  • 2200-2499 rating, Classical: 31.9% expected score (4 games)
  • 2500+ rating, Bullet: 47.8% expected score (155 games)
  • 2500+ rating, Blitz: 54.9% expected score (468 games)
  • 2500+ rating, Rapid: 62.2% expected score (15 games)

Related Openings

Parent
Nimzo-Indian Defense
48.4%
Variations (5)
Nimzo-Indian Defense: Classical Variation
50.5%
Nimzo-Indian Defense: Classical Variation, Berlin Variation
48.9%
Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System
54.8%
Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation
47.2%
Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation
46.2%

Frequently Asked Questions

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate?

The Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 46.4% (90% CI: 44.8%-48.0%) win rate for white, based on 2.6K rated games from Lichess.

At what rating does the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation perform best?

The Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation performs best at 2500+ Elo with a 47.8% win rate for white (638 games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation better in blitz or rapid?

Blitz (46.7%) outperforms Bullet (44.4%) by 2.3%. Choose your time control wisely.

How sharp is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation?

The Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a sharpness score of 91.4 (decisive), meaning 91.4% of games end decisively. Average game length is 39 moves.

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate at 1800-1999 Elo?

At 1800-1999 Elo, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 49.8% (90% CI: 41.9%-57.6%) win rate for white, based on 108 Lichess games. Average game length is 37 moves with a 6.8% draw rate.

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate at 2000-2199 Elo?

At 2000-2199 Elo, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 46.3% (90% CI: 42.2%-50.3%) win rate for white, based on 406 Lichess games. Average game length is 37 moves with a 7.0% draw rate.

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate at 2200-2499 Elo?

At 2200-2499 Elo, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 45.7% (90% CI: 43.5%-47.8%) win rate for white, based on 1.4K Lichess games. Average game length is 38 moves with a 8.0% draw rate.

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate at 2500+ Elo?

At 2500+ Elo, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 47.8% (90% CI: 44.5%-51.0%) win rate for white, based on 638 Lichess games. Average game length is 42 moves with a 11.2% draw rate.

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate in Bullet?

In Bullet games, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 44.4% (90% CI: 40.7%-48.1%) win rate for white (482 Lichess games). Draw rate is 6.1%.

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate in Blitz?

In Blitz games, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 46.7% (90% CI: 44.9%-48.5%) win rate for white (2.0K Lichess games). Draw rate is 8.8%.

What is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation win rate in Rapid?

In Rapid games, the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation has a 49.8% (90% CI: 42.2%-57.3%) win rate for white (116 Lichess games). Draw rate is 13.2%.

Is the Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation a good opening?

The Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation is statistically balanced with a 46.4% (90% CI: 44.8%-48.0%) win rate across all ratings. It performs best at 2500+ Elo. Your results depend on your rating, time control, and how well you know the typical plans.