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Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation

42K games from Lichess · Updated January 2026

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Analyze this line move by move

Black expected score · All ratings · All speeds

51.2%

45%55%
Floor50.8%

the worst score you would still get, 90% confident. At best 51.6%.

Measured over 42K 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 Black

Draw 2.3 · Score = win + ½ of the draws · 42K games

Rank among the families Black can choose here
not ranked — this is a variation, not a family
Games in this context
42K
Best context
57.3% at 1000-1199 Bullet
Worst context
41.7% at 1600-1799 Rapid
Average game length
27 moves
Games that end decisively
97.7%
Draws
2.3%

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

Gambit BreakpointBlack

Peak: +9.1% · Breakpoint: 0-999

Traps & Chaos

Complexity: 95.1 · Trap factor: +6.2 · 42K games

Where it holds · Black score by rating × clock

Green is clearly ahead for Black, grey is around even, red is behind. Tap a cell to measure there, and again to clear. It holds about the same all the way up, near 55.1%.

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: 70.0% expected score (1 games)
  • 0-999 rating, Bullet: 50.5% expected score (538 games)
  • 0-999 rating, Blitz: 55.9% expected score (753 games)
  • 0-999 rating, Rapid: 49.3% expected score (326 games)
  • 0-999 rating, Classical: 50.0% expected score (2 games)
  • 1000-1199 rating, UltraBullet: 45.3% expected score (9 games)
  • 1000-1199 rating, Bullet: 57.3% expected score (1,571 games)
  • 1000-1199 rating, Blitz: 49.8% expected score (1,652 games)
  • 1000-1199 rating, Rapid: 47.8% expected score (582 games)
  • 1000-1199 rating, Classical: 31.9% expected score (4 games)
  • 1200-1399 rating, UltraBullet: 50.0% expected score (28 games)
  • 1200-1399 rating, Bullet: 55.0% expected score (2,631 games)
  • 1200-1399 rating, Blitz: 48.6% expected score (2,544 games)
  • 1200-1399 rating, Rapid: 47.0% expected score (837 games)
  • 1200-1399 rating, Classical: 50.0% expected score (22 games)
  • 1400-1599 rating, UltraBullet: 49.3% expected score (136 games)
  • 1400-1599 rating, Bullet: 52.3% expected score (2,909 games)
  • 1400-1599 rating, Blitz: 47.7% expected score (3,236 games)
  • 1400-1599 rating, Rapid: 44.4% expected score (847 games)
  • 1400-1599 rating, Classical: 53.9% expected score (37 games)
  • 1600-1799 rating, UltraBullet: 35.7% expected score (51 games)
  • 1600-1799 rating, Bullet: 53.5% expected score (4,033 games)
  • 1600-1799 rating, Blitz: 47.6% expected score (3,592 games)
  • 1600-1799 rating, Rapid: 41.7% expected score (685 games)
  • 1600-1799 rating, Classical: 54.3% expected score (45 games)
  • 1800-1999 rating, UltraBullet: 39.7% expected score (13 games)
  • 1800-1999 rating, Bullet: 54.3% expected score (4,539 games)
  • 1800-1999 rating, Blitz: 49.1% expected score (3,039 games)
  • 1800-1999 rating, Rapid: 47.3% expected score (487 games)
  • 1800-1999 rating, Classical: 56.1% expected score (15 games)
  • 2000-2199 rating, UltraBullet: 60.6% expected score (8 games)
  • 2000-2199 rating, Bullet: 53.0% expected score (3,208 games)
  • 2000-2199 rating, Blitz: 51.9% expected score (1,403 games)
  • 2000-2199 rating, Rapid: 49.7% expected score (175 games)
  • 2000-2199 rating, Classical: 50.0% expected score (8 games)
  • 2200-2499 rating, UltraBullet: 56.5% expected score (14 games)
  • 2200-2499 rating, Bullet: 53.7% expected score (1,402 games)
  • 2200-2499 rating, Blitz: 56.4% expected score (319 games)
  • 2200-2499 rating, Rapid: 44.6% expected score (26 games)
  • 2500+ rating, Bullet: 54.8% expected score (176 games)
  • 2500+ rating, Blitz: 36.8% expected score (25 games)
  • 2500+ rating, Rapid: 70.0% expected score (1 games)

Related Openings

Parent
Latvian Gambit
49.8%
Variations (5)
Latvian Gambit: Mlotkowski Variation
49.5%
Latvian Gambit: Mason Countergambit
49.4%
Latvian Gambit: Mayet Attack, Morgado Defense
53.0%
Latvian Gambit: Clam Gambit
44.6%
Latvian Gambit: Mayet Attack
52.4%
Analyze Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation PositionsSee what each move is worth at your rating, move by move

Methodology

Across every rating and clock, the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation scores 51.2% for Black — we are 90% confident the real figure is between 50.8% and 51.6% — from 42K 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
42K+ 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 Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate?

Playing the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation, Black wins 50.0%, draws 2.3% and loses 47.6%. Counting a draw as half a point, that is an Expected Score of 51.2%. It rests on 42K rated games from Lichess.

At what rating does the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation perform best?

The Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation performs best for Black at 2200-2499, with an Expected Score of 54.1% (1.8K games) and the highest Floor of any rating with enough games to read.

Is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation better in blitz or rapid?

For Black, the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation scores higher in Blitz: an Expected Score of 49.2% in Blitz (17K games) against 46.0% in Rapid (4.0K games).

How sharp is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation?

The Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation has a sharpness score of 97.7 (very decisive), meaning 97.7% of games end decisively. Average game length is 27 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 0-999?

At 0-999, Black wins 51.6%, draws 2.4% and loses 46.0%. Counting a draw as half a point, that is an Expected Score of 52.8%. It rests on 1.6K Lichess games, which average 22 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 1000-1199?

At 1000-1199, Black wins 51.7%, draws 1.6% and loses 46.7%. Counting a draw as half a point, that is an Expected Score of 52.5%. It rests on 3.8K Lichess games, which average 23 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 1200-1399?

At 1200-1399, Black wins 50.3%, draws 1.6% and loses 48.0%. Counting a draw as half a point, that is an Expected Score of 51.2%. It rests on 6.1K Lichess games, which average 25 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 1400-1599?

At 1400-1599, Black wins 48.1%, draws 2.2% and loses 49.7%. Counting a draw as half a point, that is an Expected Score of 49.2%. It rests on 7.2K Lichess games, which average 26 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 1600-1799?

At 1600-1799, Black wins 48.7%, draws 2.5% and loses 48.8%. Counting a draw as half a point, that is an Expected Score of 50.0%. It rests on 8.4K Lichess games, which average 28 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 1800-1999?

At 1800-1999, Black wins 50.6%, draws 2.5% and loses 46.9%. Counting a draw as half a point, that is an Expected Score of 51.9%. It rests on 8.1K Lichess games, which average 30 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 2000-2199?

At 2000-2199, Black wins 51.1%, draws 2.9% and loses 46.0%. Counting a draw as half a point, that is an Expected Score of 52.6%. It rests on 4.8K Lichess games, which average 31 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 2200-2499?

At 2200-2499, Black wins 52.4%, draws 3.4% and loses 44.2%. Counting a draw as half a point, that is an Expected Score of 54.1%. It rests on 1.8K Lichess games, which average 33 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate at 2500+?

At 2500+, Black wins 49.9%, draws 5.7% and loses 44.5%. Counting a draw as half a point, that is an Expected Score of 52.7%. It rests on 202 Lichess games, which average 36 moves.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate in UltraBullet?

In UltraBullet, Black wins 46.8%, draws 0.2% and loses 53.0%. Counting a draw as half a point, that is an Expected Score of 46.9%. It rests on 260 Lichess games.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate in Bullet?

In Bullet, Black wins 52.9%, draws 1.9% and loses 45.2%. Counting a draw as half a point, that is an Expected Score of 53.9%. It rests on 21K Lichess games.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate in Blitz?

In Blitz, Black wins 47.8%, draws 2.7% and loses 49.5%. Counting a draw as half a point, that is an Expected Score of 49.2%. It rests on 17K Lichess games.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate in Rapid?

In Rapid, Black wins 44.5%, draws 2.9% and loses 52.6%. Counting a draw as half a point, that is an Expected Score of 46.0%. It rests on 4.0K Lichess games.

What is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation win rate in Classical?

In Classical, Black wins 51.7%, draws 1.9% and loses 46.5%. Counting a draw as half a point, that is an Expected Score of 52.6%. It rests on 133 Lichess games.

Is the Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation a good opening?

The Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation is about level. Across all ratings, Black wins 50.0% of its games and loses 47.6%. It performs best at 2200-2499. Your results depend on your rating, time control, and how well you know the typical plans.