Sicilian Defense: Kopec System

41K games from Lichess · Updated January 2026

View As

Playable

White Expected Score49.1%Range (90% confident): 48.7% – 49.5%Based on 41K games

0%49.1%100%

Range (90% confident): 48.7% – 49.5%

Outcome Distribution

47.0%4.2%48.8%

Win

Draw

Loss

3.Bd3

Sicilian Defense: Kopec System

Analyzen=41K

Avg Length35 moves

Sharpness96%

Draw Rate4.2%

Snapshot

At all ratings, the Sicilian Defense: Kopec System has a 49.1% expected score for White (we're 90% confident it's between 48.7% and 49.5%), based on 41K Lichess games.

Extra Analysis

Deep-dive datasets for this opening

Time-Control Swing

Max swing: 13.8% · Bullet best · Classical worst

White Win% by Rating

Stable across ratings (~42%)

1000

1200

1400

1600

1800

2000

2200

2500+

White Win% by Time Control

Best in Bullet (49%), worst in Classical (35%)

UltraBullet

Bullet

Blitz

Rapid

Classical

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: 24.7% expected score (38 games)
0-999 rating, Bullet: 42.7% expected score (901 games)
0-999 rating, Blitz: 44.9% expected score (978 games)
0-999 rating, Rapid: 42.4% expected score (634 games)
0-999 rating, Classical: 19.0% expected score (13 games)
1000-1199 rating, UltraBullet: 40.0% expected score (68 games)
1000-1199 rating, Bullet: 47.9% expected score (1,382 games)
1000-1199 rating, Blitz: 47.7% expected score (1,513 games)
1000-1199 rating, Rapid: 42.6% expected score (719 games)
1000-1199 rating, Classical: 40.4% expected score (14 games)
1200-1399 rating, UltraBullet: 50.8% expected score (69 games)
1200-1399 rating, Bullet: 45.6% expected score (1,837 games)
1200-1399 rating, Blitz: 49.1% expected score (2,060 games)
1200-1399 rating, Rapid: 44.3% expected score (894 games)
1200-1399 rating, Classical: 38.5% expected score (42 games)
1400-1599 rating, UltraBullet: 38.8% expected score (61 games)
1400-1599 rating, Bullet: 47.8% expected score (2,471 games)
1400-1599 rating, Blitz: 46.3% expected score (2,397 games)
1400-1599 rating, Rapid: 40.2% expected score (951 games)
1400-1599 rating, Classical: 32.9% expected score (95 games)
1600-1799 rating, UltraBullet: 60.6% expected score (27 games)
1600-1799 rating, Bullet: 51.6% expected score (2,761 games)
1600-1799 rating, Blitz: 50.6% expected score (2,959 games)
1600-1799 rating, Rapid: 48.3% expected score (787 games)
1600-1799 rating, Classical: 40.2% expected score (44 games)
1800-1999 rating, UltraBullet: 27.0% expected score (5 games)
1800-1999 rating, Bullet: 51.8% expected score (2,629 games)
1800-1999 rating, Blitz: 51.0% expected score (4,454 games)
1800-1999 rating, Rapid: 51.8% expected score (861 games)
1800-1999 rating, Classical: 51.6% expected score (29 games)
2000-2199 rating, UltraBullet: 70.0% expected score (1 games)
2000-2199 rating, Bullet: 51.9% expected score (2,208 games)
2000-2199 rating, Blitz: 51.4% expected score (2,450 games)
2000-2199 rating, Rapid: 49.6% expected score (492 games)
2000-2199 rating, Classical: 58.7% expected score (10 games)
2200-2499 rating, UltraBullet: 70.0% expected score (1 games)
2200-2499 rating, Bullet: 56.8% expected score (1,728 games)
2200-2499 rating, Blitz: 50.1% expected score (1,957 games)
2200-2499 rating, Rapid: 48.0% expected score (121 games)
2200-2499 rating, Classical: 50.0% expected score (2 games)
2500+ rating, Bullet: 54.6% expected score (219 games)
2500+ rating, Blitz: 58.5% expected score (105 games)
2500+ rating, Rapid: 47.1% expected score (32 games)
2500+ rating, Classical: 50.0% expected score (1 games)

Related Openings

Parent

Sicilian Defense

48.5%

Variations (5)

Sicilian Defense: Accelerated Dragon

45.7%

Sicilian Defense: Accelerated Dragon, Exchange Variation

45.8%

Sicilian Defense: Accelerated Dragon, Maróczy Bind

48.8%

Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation

43.7%

Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation

44.6%

Analyze Sicilian Defense: Kopec System PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the Sicilian Defense: Kopec System win rate?

The Sicilian Defense: Kopec System has a 47.0% (90% CI: 46.6%-47.4%) win rate for white, based on 41K rated games from Lichess.

At what rating does the Sicilian Defense: Kopec System perform best?

The Sicilian Defense: Kopec System performs best at 2200-2499 Elo with a 49.7% win rate for white (3.8K games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the Sicilian Defense: Kopec System better in blitz or rapid?

Bullet (48.6%) outperforms Classical (34.8%) by 13.8%. Choose your time control wisely.

How sharp is the Sicilian Defense: Kopec System?

The Sicilian Defense: Kopec System has a sharpness score of 95.8 (very decisive), meaning 95.8% of games end decisively. Average game length is 35 moves.

What is the Sicilian Defense: Kopec System win rate at 0-999 Elo?

At 0-999 Elo, the Sicilian Defense: Kopec System has a 41.7% (90% CI: 40.1%-43.3%) win rate for white, based on 2.6K Lichess games. Average game length is 28 moves with a 2.7% draw rate.

What is the Sicilian Defense: Kopec System win rate at 1000-1199 Elo?

At 1000-1199 Elo, the Sicilian Defense: Kopec System has a 45.0% (90% CI: 43.7%-46.4%) win rate for white, based on 3.7K Lichess games. Average game length is 30 moves with a 3.1% draw rate.

What is the Sicilian Defense: Kopec System win rate at 1200-1399 Elo?

At 1200-1399 Elo, the Sicilian Defense: Kopec System has a 45.3% (90% CI: 44.1%-46.4%) win rate for white, based on 4.9K Lichess games. Average game length is 32 moves with a 3.1% draw rate.

What is the Sicilian Defense: Kopec System win rate at 1400-1599 Elo?

At 1400-1599 Elo, the Sicilian Defense: Kopec System has a 43.9% (90% CI: 42.9%-45.0%) win rate for white, based on 6.0K Lichess games. Average game length is 33 moves with a 3.3% draw rate.

What is the Sicilian Defense: Kopec System win rate at 1600-1799 Elo?

At 1600-1799 Elo, the Sicilian Defense: Kopec System has a 49.1% (90% CI: 48.1%-50.1%) win rate for white, based on 6.6K Lichess games. Average game length is 35 moves with a 3.2% draw rate.

What is the Sicilian Defense: Kopec System win rate at 1800-1999 Elo?

At 1800-1999 Elo, the Sicilian Defense: Kopec System has a 49.1% (90% CI: 48.2%-50.0%) win rate for white, based on 8.0K Lichess games. Average game length is 37 moves with a 4.4% draw rate.

What is the Sicilian Defense: Kopec System win rate at 2000-2199 Elo?

At 2000-2199 Elo, the Sicilian Defense: Kopec System has a 48.8% (90% CI: 47.7%-49.9%) win rate for white, based on 5.2K Lichess games. Average game length is 39 moves with a 5.3% draw rate.

What is the Sicilian Defense: Kopec System win rate at 2200-2499 Elo?

At 2200-2499 Elo, the Sicilian Defense: Kopec System has a 49.7% (90% CI: 48.4%-51.0%) win rate for white, based on 3.8K Lichess games. Average game length is 42 moves with a 6.8% draw rate.

What is the Sicilian Defense: Kopec System win rate at 2500+ Elo?

At 2500+ Elo, the Sicilian Defense: Kopec System has a 40.6% (90% CI: 36.4%-44.9%) win rate for white, based on 357 Lichess games. Average game length is 46 moves with a 28.9% draw rate.

What is the Sicilian Defense: Kopec System win rate in UltraBullet?

In UltraBullet games, the Sicilian Defense: Kopec System has a 41.4% (90% CI: 36.6%-46.4%) win rate for white (270 Lichess games). Draw rate is 1.7%.

What is the Sicilian Defense: Kopec System win rate in Bullet?

In Bullet games, the Sicilian Defense: Kopec System has a 48.6% (90% CI: 47.9%-49.2%) win rate for white (16K Lichess games). Draw rate is 3.2%.

What is the Sicilian Defense: Kopec System win rate in Blitz?

In Blitz games, the Sicilian Defense: Kopec System has a 47.1% (90% CI: 46.5%-47.7%) win rate for white (19K Lichess games). Draw rate is 4.8%.

What is the Sicilian Defense: Kopec System win rate in Rapid?

In Rapid games, the Sicilian Defense: Kopec System has a 42.8% (90% CI: 41.7%-43.9%) win rate for white (5.5K Lichess games). Draw rate is 5.3%.

What is the Sicilian Defense: Kopec System win rate in Classical?

In Classical games, the Sicilian Defense: Kopec System has a 34.8% (90% CI: 29.9%-39.8%) win rate for white (250 Lichess games). Draw rate is 6.2%.

Is the Sicilian Defense: Kopec System a good opening?

The Sicilian Defense: Kopec System is statistically balanced with a 47.0% (90% CI: 46.6%-47.4%) win rate across all ratings. It performs best at 2200-2499 Elo. Your results depend on your rating, time control, and how well you know the typical plans.

What is the Sicilian Defense: Kopec System expected score for White?