Borg Defense

4 variations · 1.9M games from Lichess · Updated January 2026

Key Finding

Borg Defense gives White a 52.9% expected score — a strong opening choice.

With a minimum advantage of 5.7%, this opening reliably outperforms the baseline 50% expected score.

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Rating

Time

White Expected Score0.0%Range (90% confident): 52.9% – 53.0%Aggregated from 4 variations

0%52.9%100%

Range (90% confident): 52.9% – 53.0%

ContextOverall · n=1.9M

Outcome Distribution

51.5%2.9%45.7%

Win

Draw

Loss

1...g5

Borg Defense

Variations4

Games (Context)1.9M

Avg Length29 moves

Draw Rate2.9%

What Should I Play?

Player-controlled continuations for White · Overall · limited data

No continuation list is available for this context yet (needs more games).

Continuations show the most common variations from this opening. Higher expected scores indicate better statistical outcomes, but familiarity and playstyle matter too.

Snapshot

Overall, the Borg Defense family has a 52.9% expected score for White (we're 90% confident it's between 52.9% and 53.0%), aggregated from 4 variations and 1.9M Lichess games.

White Win% by Rating

Improves with rating: 53% → 56%

1000

1200

1400

1600

1800

2000

2200

2500+

White Win% by Time Control

Best in Classical (58%), worst in Bullet (51%)

UltraBullet

Bullet

Blitz

Rapid

Classical

Rating vs Time Control Matrix

Click cells to filter · White expected scores

White% by Rating × Time Control

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

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

0-999 rating, UltraBullet: 53.9% expected score (178 games)
0-999 rating, Bullet: 53.3% expected score (45,538 games)
0-999 rating, Blitz: 54.3% expected score (102,420 games)
0-999 rating, Rapid: 58.6% expected score (52,472 games)
0-999 rating, Classical: 66.2% expected score (623 games)
1000-1199 rating, UltraBullet: 59.2% expected score (457 games)
1000-1199 rating, Bullet: 52.3% expected score (60,987 games)
1000-1199 rating, Blitz: 52.5% expected score (119,777 games)
1000-1199 rating, Rapid: 55.6% expected score (49,779 games)
1000-1199 rating, Classical: 61.7% expected score (1,675 games)
1200-1399 rating, UltraBullet: 58.0% expected score (860 games)
1200-1399 rating, Bullet: 51.4% expected score (84,880 games)
1200-1399 rating, Blitz: 52.2% expected score (165,303 games)
1200-1399 rating, Rapid: 54.3% expected score (57,291 games)
1200-1399 rating, Classical: 57.5% expected score (4,782 games)
1400-1599 rating, UltraBullet: 53.4% expected score (1,383 games)
1400-1599 rating, Bullet: 51.5% expected score (108,793 games)
1400-1599 rating, Blitz: 52.3% expected score (173,886 games)
1400-1599 rating, Rapid: 53.0% expected score (60,777 games)
1400-1599 rating, Classical: 62.5% expected score (5,582 games)
1600-1799 rating, UltraBullet: 47.8% expected score (2,066 games)
1600-1799 rating, Bullet: 52.1% expected score (110,750 games)
1600-1799 rating, Blitz: 52.7% expected score (143,543 games)
1600-1799 rating, Rapid: 53.7% expected score (46,275 games)
1600-1799 rating, Classical: 59.2% expected score (1,984 games)
1800-1999 rating, UltraBullet: 51.2% expected score (2,479 games)
1800-1999 rating, Bullet: 51.2% expected score (111,961 games)
1800-1999 rating, Blitz: 53.0% expected score (100,325 games)
1800-1999 rating, Rapid: 53.8% expected score (26,215 games)
1800-1999 rating, Classical: 51.1% expected score (1,181 games)
2000-2199 rating, UltraBullet: 51.8% expected score (1,107 games)
2000-2199 rating, Bullet: 52.2% expected score (76,961 games)
2000-2199 rating, Blitz: 54.0% expected score (46,804 games)
2000-2199 rating, Rapid: 57.9% expected score (7,239 games)
2000-2199 rating, Classical: 56.7% expected score (368 games)
2200-2499 rating, UltraBullet: 54.3% expected score (638 games)
2200-2499 rating, Bullet: 52.7% expected score (61,505 games)
2200-2499 rating, Blitz: 55.7% expected score (11,726 games)
2200-2499 rating, Rapid: 58.0% expected score (802 games)
2200-2499 rating, Classical: 83.4% expected score (3 games)
2500+ rating, UltraBullet: 59.3% expected score (47 games)
2500+ rating, Bullet: 58.0% expected score (7,337 games)
2500+ rating, Blitz: 61.0% expected score (627 games)
2500+ rating, Rapid: 66.0% expected score (55 games)

Matrix view reveals how performance varies across rating brackets and time controls. Green indicates favorable, red indicates challenging contexts.

Variations (4)

Borg Defense: Zilbermints Gambit9.7K games

Winning58.8%

Borg Defense: Borg Gambit524K games

Winning53.6%

Borg Defense1.3M games

Winning52.6%

Borg Defense: Troon Gambit1.9K games

Balanced50.7%

Analyze Borg Defense PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the Borg Defense win rate?

The Borg Defense family has a 51.5% (90% CI: 51.4%-51.5%) win rate for white, aggregated from 4 variations and 1.9M rated games from Lichess.

How many Borg Defense variations are there?

This analysis covers 4 Borg Defense variations with sufficient game data. Each variation has its own statistics page with detailed win rates by rating and time control.

At what rating does the Borg Defense perform best?

The Borg Defense family performs best at 2500+ Elo with a 55.8% win rate for white (8.1K games). Performance may vary by specific variation.

Is the Borg Defense better in blitz or rapid?

Classical (57.8%) outperforms UltraBullet (51.3%) by 6.5% across all Borg Defense variations.

How sharp is the Borg Defense?

Borg Defense games are 97.1% decisive (non-draws), with an average length of 29 moves. Sharpness varies by specific variation.

Is the Borg Defense a good opening family?

The Borg Defense family is statistically favors white overall with a 51.5% (90% CI: 51.4%-51.5%) aggregated win rate. However, win rates vary significantly between the 4 variations—explore individual lines to find the best fit for your style.