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Analyzer

Pterodactyl Defense: Western, Siroccopteryx

1.9K games from Lichess · Updated January 2026

Tough Sell
White Expected Score41.4%Range (90% confident): 39.6% – 43.3%Based on 1.9K games
0%41.4%100%
Range (90% confident): 39.6% – 43.3%
Outcome Distribution
39.9%3.1%57.1%
Win
Draw
Loss
5...Qa5+
Pterodactyl Defense: Western, Siroccopteryx
Analyzen=1.9K
Avg Length29 moves
Sharpness97%
Draw Rate3.1%

What is the Pterodactyl Defense: Western, Siroccopteryx expected score for White?

Snapshot

At all ratings, the Pterodactyl Defense: Western, Siroccopteryx has a 41.4% expected score for White (we're 90% confident it's between 39.6% and 43.3%), based on 1.9K Lichess games.

White Win% by Rating

Improves with rating: 30% → 39%

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 30.2% win rate (30 games)
  • 1000-1199: 36.9% win rate (73 games)
  • 1200-1399: 46.0% win rate (217 games)
  • 1400-1599: 43.5% win rate (349 games)
  • 1600-1799: 44.0% win rate (386 games)
  • 1800-1999: 36.7% win rate (343 games)
  • 2000-2199: 35.0% win rate (266 games)
  • 2200-2499: 32.0% win rate (172 games)
  • 2500+: 39.1% win rate (33 games)

White Win% by Time Control

Best in Rapid (42%), worst in UltraBullet (20%)

UltraBullet
Bullet
Blitz
Rapid
Classical

  • UltraBullet: 20.0% win rate (1 games)
  • Bullet: 38.9% win rate (620 games)
  • Blitz: 39.7% win rate (849 games)
  • Rapid: 42.2% win rate (386 games)
  • Classical: 31.0% win rate (13 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: 12.0% expected score (13 games)
  • 0-999 rating, Blitz: 67.4% expected score (10 games)
  • 0-999 rating, Rapid: 20.6% expected score (7 games)
  • 1000-1199 rating, Bullet: 26.1% expected score (34 games)
  • 1000-1199 rating, Blitz: 51.7% expected score (29 games)
  • 1000-1199 rating, Rapid: 41.3% expected score (10 games)
  • 1200-1399 rating, Bullet: 40.2% expected score (85 games)
  • 1200-1399 rating, Blitz: 47.9% expected score (93 games)
  • 1200-1399 rating, Rapid: 58.7% expected score (39 games)
  • 1400-1599 rating, Bullet: 37.6% expected score (75 games)
  • 1400-1599 rating, Blitz: 45.1% expected score (153 games)
  • 1400-1599 rating, Rapid: 50.0% expected score (119 games)
  • 1400-1599 rating, Classical: 21.5% expected score (2 games)
  • 1600-1799 rating, UltraBullet: 30.0% expected score (1 games)
  • 1600-1799 rating, Bullet: 66.9% expected score (46 games)
  • 1600-1799 rating, Blitz: 44.5% expected score (231 games)
  • 1600-1799 rating, Rapid: 39.5% expected score (103 games)
  • 1600-1799 rating, Classical: 57.7% expected score (5 games)
  • 1800-1999 rating, Bullet: 38.6% expected score (134 games)
  • 1800-1999 rating, Blitz: 36.0% expected score (145 games)
  • 1800-1999 rating, Rapid: 46.7% expected score (58 games)
  • 1800-1999 rating, Classical: 30.0% expected score (6 games)
  • 2000-2199 rating, Bullet: 43.1% expected score (114 games)
  • 2000-2199 rating, Blitz: 33.0% expected score (122 games)
  • 2000-2199 rating, Rapid: 35.8% expected score (30 games)
  • 2200-2499 rating, Bullet: 35.5% expected score (88 games)
  • 2200-2499 rating, Blitz: 31.0% expected score (64 games)
  • 2200-2499 rating, Rapid: 31.4% expected score (20 games)
  • 2500+ rating, Bullet: 42.4% expected score (31 games)
  • 2500+ rating, Blitz: 50.0% expected score (2 games)

Related Openings

Parent
Pterodactyl Defense
44.0%
Variations (5)
Pterodactyl Defense: Austrian, Austriadactylus Western
41.1%
Pterodactyl Defense: Austrian, Grand Prix Pterodactyl
53.8%
Pterodactyl Defense: Austrian, Pteranodon
41.2%
Pterodactyl Defense: Central, Anhanguera
38.0%
Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl
48.8%
Analyze Pterodactyl Defense: Western, Siroccopteryx PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the Pterodactyl Defense: Western, Siroccopteryx win rate?

The Pterodactyl Defense: Western, Siroccopteryx has a 39.9% (90% CI: 38.0%-41.7%) win rate for white, based on 1.9K rated games from Lichess.

At what rating does the Pterodactyl Defense: Western, Siroccopteryx perform best?

The Pterodactyl Defense: Western, Siroccopteryx performs best at 1200-1399 Elo with a 46.0% win rate for white (217 games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the Pterodactyl Defense: Western, Siroccopteryx better in blitz or rapid?

Rapid (42.2%) outperforms Bullet (38.9%) by 3.3%. Choose your time control wisely.

How sharp is the Pterodactyl Defense: Western, Siroccopteryx?

The Pterodactyl Defense: Western, Siroccopteryx has a sharpness score of 96.9 (very decisive), meaning 96.9% of games end decisively. Average game length is 29 moves.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate at 1200-1399 Elo?

At 1200-1399 Elo, the Pterodactyl Defense: Western, Siroccopteryx has a 46.0% (90% CI: 40.5%-51.6%) win rate for white, based on 217 Lichess games. Average game length is 25 moves with a 1.6% draw rate.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate at 1400-1599 Elo?

At 1400-1599 Elo, the Pterodactyl Defense: Western, Siroccopteryx has a 43.5% (90% CI: 39.2%-47.9%) win rate for white, based on 349 Lichess games. Average game length is 27 moves with a 2.7% draw rate.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate at 1600-1799 Elo?

At 1600-1799 Elo, the Pterodactyl Defense: Western, Siroccopteryx has a 44.0% (90% CI: 39.9%-48.2%) win rate for white, based on 386 Lichess games. Average game length is 30 moves with a 3.7% draw rate.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate at 1800-1999 Elo?

At 1800-1999 Elo, the Pterodactyl Defense: Western, Siroccopteryx has a 36.7% (90% CI: 32.5%-41.0%) win rate for white, based on 343 Lichess games. Average game length is 30 moves with a 3.6% draw rate.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate at 2000-2199 Elo?

At 2000-2199 Elo, the Pterodactyl Defense: Western, Siroccopteryx has a 35.0% (90% CI: 30.2%-39.8%) win rate for white, based on 266 Lichess games. Average game length is 31 moves with a 5.0% draw rate.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate at 2200-2499 Elo?

At 2200-2499 Elo, the Pterodactyl Defense: Western, Siroccopteryx has a 32.0% (90% CI: 26.3%-37.9%) win rate for white, based on 172 Lichess games. Average game length is 33 moves with a 2.0% draw rate.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate in Bullet?

In Bullet games, the Pterodactyl Defense: Western, Siroccopteryx has a 38.9% (90% CI: 35.7%-42.1%) win rate for white (620 Lichess games). Draw rate is 2.0%.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate in Blitz?

In Blitz games, the Pterodactyl Defense: Western, Siroccopteryx has a 39.7% (90% CI: 36.9%-42.5%) win rate for white (849 Lichess games). Draw rate is 3.2%.

What is the Pterodactyl Defense: Western, Siroccopteryx win rate in Rapid?

In Rapid games, the Pterodactyl Defense: Western, Siroccopteryx has a 42.2% (90% CI: 38.1%-46.3%) win rate for white (386 Lichess games). Draw rate is 4.5%.

Is the Pterodactyl Defense: Western, Siroccopteryx a good opening?

The Pterodactyl Defense: Western, Siroccopteryx is slightly favors black with a 39.9% (90% CI: 38.0%-41.7%) win rate across all ratings. It performs best at 1200-1399 Elo. Your results depend on your rating, time control, and how well you know the typical plans.