Skip to content
TrueEloPlay what wins.
Score a position

King's Gambit Accepted: Mason-Keres Gambit

44K games from Lichess · Updated January 2026

8
7
6
5
4
3
2
a1
b
c
d
e
f
g
h
3.Nc3
Analyze this line move by move

White expected score · All ratings · All speeds

52.9%

45%60%
Floor52.6%

the worst score you would still get, 90% confident. At best 53.3%.

Measured over 44K games at this level and clock.

Play Thiswins clearly more often than it loses at this level

A strong choice for White at this level and clock.

Outcomes for White

Draw 3.1 · Score = win + ½ of the draws · 44K games

Rank among the families White can choose here
not ranked — this is a variation, not a family
Games in this context
44K
Best context
57.9% at 2000-2199 Blitz
Worst context
46.9% at 1200-1399 Rapid
Average game length
30 moves
Games that end decisively
96.9%
Draws
3.1%

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 BreakpointWhite

Peak: +11.6% · Breakpoint: 0-999

Time-Control Swing

Max swing: 10.5% · Bullet best · Classical worst

Where it holds · White score by rating × clock

Green is clearly ahead for White, grey is around even, red is behind. Tap a cell to measure there, and again to clear. It falls away as the rating rises: 56.8% at 0-999, 52.5% at 2500+.

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: 78.6% expected score (2 games)
  • 0-999 rating, Bullet: 50.8% expected score (666 games)
  • 0-999 rating, Blitz: 49.8% expected score (1,479 games)
  • 0-999 rating, Rapid: 49.0% expected score (752 games)
  • 0-999 rating, Classical: 55.9% expected score (7 games)
  • 1000-1199 rating, UltraBullet: 50.0% expected score (10 games)
  • 1000-1199 rating, Bullet: 53.7% expected score (1,285 games)
  • 1000-1199 rating, Blitz: 49.9% expected score (2,184 games)
  • 1000-1199 rating, Rapid: 49.3% expected score (953 games)
  • 1000-1199 rating, Classical: 69.4% expected score (14 games)
  • 1200-1399 rating, UltraBullet: 73.1% expected score (5 games)
  • 1200-1399 rating, Bullet: 55.0% expected score (1,685 games)
  • 1200-1399 rating, Blitz: 49.2% expected score (2,765 games)
  • 1200-1399 rating, Rapid: 46.9% expected score (1,096 games)
  • 1200-1399 rating, Classical: 52.8% expected score (53 games)
  • 1400-1599 rating, UltraBullet: 57.9% expected score (24 games)
  • 1400-1599 rating, Bullet: 53.2% expected score (2,024 games)
  • 1400-1599 rating, Blitz: 51.8% expected score (3,383 games)
  • 1400-1599 rating, Rapid: 48.2% expected score (1,008 games)
  • 1400-1599 rating, Classical: 39.1% expected score (67 games)
  • 1600-1799 rating, UltraBullet: 72.3% expected score (12 games)
  • 1600-1799 rating, Bullet: 53.3% expected score (2,469 games)
  • 1600-1799 rating, Blitz: 51.3% expected score (3,173 games)
  • 1600-1799 rating, Rapid: 50.0% expected score (907 games)
  • 1600-1799 rating, Classical: 41.1% expected score (32 games)
  • 1800-1999 rating, UltraBullet: 38.9% expected score (12 games)
  • 1800-1999 rating, Bullet: 54.9% expected score (2,715 games)
  • 1800-1999 rating, Blitz: 53.8% expected score (3,305 games)
  • 1800-1999 rating, Rapid: 50.7% expected score (538 games)
  • 1800-1999 rating, Classical: 32.5% expected score (27 games)
  • 2000-2199 rating, Bullet: 55.3% expected score (2,286 games)
  • 2000-2199 rating, Blitz: 57.9% expected score (3,827 games)
  • 2000-2199 rating, Rapid: 55.8% expected score (413 games)
  • 2000-2199 rating, Classical: 47.2% expected score (16 games)
  • 2200-2499 rating, Bullet: 52.9% expected score (1,154 games)
  • 2200-2499 rating, Blitz: 57.9% expected score (2,634 games)
  • 2200-2499 rating, Rapid: 58.5% expected score (128 games)
  • 2200-2499 rating, Classical: 70.0% expected score (1 games)
  • 2500+ rating, Bullet: 51.9% expected score (183 games)
  • 2500+ rating, Blitz: 59.5% expected score (258 games)
  • 2500+ rating, Rapid: 46.0% expected score (11 games)

Related Openings

Parent
King's Gambit Accepted
43.1%
Variations (5)
King's Gambit Accepted: MacLeod Defense
53.4%
King's Gambit Accepted: Fischer Defense
52.1%
King's Gambit Accepted: King's Knight's Gambit
55.3%
King's Gambit Accepted: Modern Defense
51.3%
King's Gambit Accepted: Schallopp Defense
53.3%
Analyze King's Gambit Accepted: Mason-Keres Gambit PositionsSee what each move is worth at your rating, move by move

Methodology

Across every rating and clock, the King's Gambit Accepted: Mason-Keres Gambit scores 52.9% for White — we are 90% confident the real figure is between 52.6% and 53.3% — from 44K 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
44K+ 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 King's Gambit Accepted: Mason-Keres Gambit win rate?

Playing the King's Gambit Accepted: Mason-Keres Gambit, White wins 51.3%, draws 3.1% and loses 45.5%. Counting a draw as half a point, that is an Expected Score of 52.9%. It rests on 44K rated games from Lichess.

At what rating does the King's Gambit Accepted: Mason-Keres Gambit perform best?

The King's Gambit Accepted: Mason-Keres Gambit performs best for White at 2000-2199, with an Expected Score of 56.8% (6.5K games) and the highest Floor of any rating with enough games to read.

Is the King's Gambit Accepted: Mason-Keres Gambit better in blitz or rapid?

For White, the King's Gambit Accepted: Mason-Keres Gambit scores higher in Blitz: an Expected Score of 53.2% in Blitz (23K games) against 49.5% in Rapid (5.8K games).

How sharp is the King's Gambit Accepted: Mason-Keres Gambit?

The King's Gambit Accepted: Mason-Keres Gambit has a sharpness score of 96.9 (very decisive), meaning 96.9% of games end decisively. Average game length is 30 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 0-999?

At 0-999, White wins 48.0%, draws 3.6% and loses 48.4%. Counting a draw as half a point, that is an Expected Score of 49.8%. It rests on 2.9K Lichess games, which average 25 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 1000-1199?

At 1000-1199, White wins 49.5%, draws 2.7% and loses 47.7%. Counting a draw as half a point, that is an Expected Score of 50.9%. It rests on 4.4K Lichess games, which average 27 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 1200-1399?

At 1200-1399, White wins 49.2%, draws 2.6% and loses 48.2%. Counting a draw as half a point, that is an Expected Score of 50.5%. It rests on 5.6K Lichess games, which average 28 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 1400-1599?

At 1400-1599, White wins 50.2%, draws 2.6% and loses 47.2%. Counting a draw as half a point, that is an Expected Score of 51.5%. It rests on 6.5K Lichess games, which average 29 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 1600-1799?

At 1600-1799, White wins 50.5%, draws 2.5% and loses 46.9%. Counting a draw as half a point, that is an Expected Score of 51.8%. It rests on 6.6K Lichess games, which average 31 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 1800-1999?

At 1800-1999, White wins 52.4%, draws 2.8% and loses 44.8%. Counting a draw as half a point, that is an Expected Score of 53.8%. It rests on 6.6K Lichess games, which average 31 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 2000-2199?

At 2000-2199, White wins 54.9%, draws 3.8% and loses 41.3%. Counting a draw as half a point, that is an Expected Score of 56.8%. It rests on 6.5K Lichess games, which average 31 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 2200-2499?

At 2200-2499, White wins 54.1%, draws 4.6% and loses 41.3%. Counting a draw as half a point, that is an Expected Score of 56.4%. It rests on 3.9K Lichess games, which average 32 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate at 2500+?

At 2500+, White wins 52.1%, draws 7.8% and loses 40.0%. Counting a draw as half a point, that is an Expected Score of 56.1%. It rests on 452 Lichess games, which average 35 moves.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate in Bullet?

In Bullet, White wins 52.8%, draws 2.2% and loses 45.0%. Counting a draw as half a point, that is an Expected Score of 53.9%. It rests on 14K Lichess games.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate in Blitz?

In Blitz, White wins 51.4%, draws 3.5% and loses 45.1%. Counting a draw as half a point, that is an Expected Score of 53.2%. It rests on 23K Lichess games.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate in Rapid?

In Rapid, White wins 47.7%, draws 3.6% and loses 48.7%. Counting a draw as half a point, that is an Expected Score of 49.5%. It rests on 5.8K Lichess games.

What is the King's Gambit Accepted: Mason-Keres Gambit win rate in Classical?

In Classical, White wins 42.3%, draws 5.7% and loses 51.9%. Counting a draw as half a point, that is an Expected Score of 45.2%. It rests on 217 Lichess games.

Is the King's Gambit Accepted: Mason-Keres Gambit a good opening?

The King's Gambit Accepted: Mason-Keres Gambit is good for White. Across all ratings, White wins 51.3% of its games and loses 45.5%. It performs best at 2000-2199. Your results depend on your rating, time control, and how well you know the typical plans.