Chess openings by rating: where games go wrong in the first 12 moves
Ask how to improve your openings and you'll be handed a repertoire to memorize. Our counts of 150,000 online games point somewhere else. The opening is where the gap between ratings is widest, but below 1600 the gap is mostly simple habits, and how many openings you play makes no measurable difference.
How we counted
The opening is the first ten moves for each side; the middlegame moves 11 to 25. A slip is a move that costs at least 10 points of winning chances, out of 100. Numbers are from rapid games unless labeled. Ratings are Lichess ratings.
The opening is where ratings split apart
| Slips per 100 opening moves (rapid) | Under 800 | 800–1199 | 1200–1599 | 1600–1999 | 2000+ |
|---|---|---|---|---|---|
| 18.3 | 12.3 | 7.8 | 4.4 | 2.2 |
That's an eight-to-one gap. In the middlegame the same groups differ by less than two to one, and after move 25 hardly at all. Split the difference between neighboring rating groups by phase, and the opening carries 75% of the gap from under 800 to the 800s and 1000s, 63% to 1200, 57% to 1600, and only 33% past 1600.
Coming out of the opening behind
| Games a pawn or more down around move 12 (blitz) | Under 800 | 800–1199 | 1200–1599 | 1600–1999 | 2000+ |
|---|---|---|---|---|---|
| As White | 38% | 31% | 25% | 15% | 8% |
| As Black | 42% | 37% | 33% | 22% | 13% |
An under-800 player starts the middlegame a pawn or more down in about two games out of five. A 2000+ player, about one in ten. (Black starts behind at every rating; that's chess, not a habit.)
It's habits, not theory
Two simple habits fade steadily with rating:
| Per 100 blitz games | Under 800 | 800–1199 | 1200–1599 | 1600–1999 | 2000+ |
|---|---|---|---|---|---|
| Queen moved in the first four moves (not a capture) | 20 | 7 | 9 | 4 | 4 |
| After ten moves, two or more knights and bishops still home while the opponent has developed | 21 | 17 | 16 | 12 | 11 |
And the oldest trap still works below 800: players there fall for Scholar's mate in about 1 game in 100. From 1600 up, never in these games.
Moves that leave a piece loose make up most of the opening gap at lower ratings too (see Hanging pieces). Put together: the under-1200 opening problem is mostly pieces left loose, queens out early, and pieces left at home.
Does a bigger repertoire help?
We looked at 100 players with about 200 games each, 20 at each rating level, and counted how many different openings each played regularly.
- Wide or narrow makes no difference to rating. Players with a narrow repertoire and players with a wide one were rated about the same, and neither did better than their rating predicted.
- Below 800, familiar openings help. Players there came out of their most-played openings better than their rare ones (12 of 17 players, by about half a pawn at move 12).
- Above 1200, they don't. Players came out of their main openings no better than their rare ones (23 of 60 players did better in their main ones).
So a beginner gains from playing the same few openings and learning them. Past 1200, opening choice stops being where the points are, and familiarity stops paying.
What to work on
- Below 1200: develop knights and bishops before the queen, castle, and check every loose piece before each move. Pick a small set of openings and keep playing them.
- From 1200 to 1600: look at the games where you came out of the opening a pawn down, and find the move it went wrong. It's usually one move, not a line you didn't know.
- Past 1600: the opening is a smaller share of the gap. Learn the ideas of the openings you play, then spend the time on the middlegame.
In your report: "Your openings" shows how you come out of each opening you play, next to players at your rating, and the phase breakdown shows where in the game your slips happen.
Common questions
What chess openings should a beginner learn? Which opening matters less than habits: develop knights and bishops before the queen, castle, and check every loose piece. Pick a small set of openings and keep playing them.
How many chess openings should I learn? Among 100 players, a wide or narrow repertoire made no difference to rating. Below 800, players did better in their most-played openings; above 1200, that edge disappeared.
Do I need to study opening theory? Not below 1600. Players under 800 slip on 18 of every 100 opening moves and players over 2000 on 2, and most of the gap is simple habits, not lines.
About these numbers
- Games: 150,000 Lichess games from August 2026 with Lichess's own engine evaluations, players' names removed. Rapid: 2,742 player-games under 800 up to 30,707 at 1200–1599.
- Blitz figures (behind at move 12, early queen, development, Scholar's mate, repertoire) come from 19,959 games by 100 public Lichess players, 20 per rating group. "Rare" openings include ones the opponent chose, especially as Black.
- Written and counted by Plysight. Updated twice a year.
See how your openings go. Your last 200 games from chess.com or Lichess, or a PGN file. Free, no account.