Missed checkmates and free material: what players at each rating walk past
Tactics training is usually sold as "find more tactics." Our counts of 150,000 online games suggest something more specific. Mate in one is a real gap between ratings, though smaller than it first looks. Free material is barely a gap at all, except in one way.
How we counted
Mate in one is checked by the rules of chess: a move that gives checkmate immediately. A piece is free when an enemy knight, bishop, rook or queen could be won by counting attackers and defenders. 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.
Missing mate in one
| Moves that walked past a mate in one (rapid) | Under 800 | 800–1199 | 1200–1599 | 1600–1999 | 2000+ |
|---|---|---|---|---|---|
| Per 1,000 moves | 9.8 | 4.6 | 2.1 | 1.0 | 0.7 |
Players under 800 walk past a mate in one about fourteen times as often as players over 2000. In blitz, the typical under-800 player plays about 45% of the mates in one they're given; the typical 2000+ player about 76%.
Here's the twist: most missed mates don't cost much. At every rating, only about 15% of those moves were slips. The player was usually winning anyway and played another winning move. Missing mate in one mostly makes games longer, and longer games give the opponent more chances. It's about finishing, not about the moment itself.
Leaving mate in one
You'll often read that beginners leave mate in one far more than strong players. True, but the usual numbers overstate it, because most of those mates are allowed in positions that were already lost, and strong players resign those games instead of playing on. In blitz, 42% of losses under 800 end in checkmate; at 2000+, 13%.
Counting only positions that weren't already lost, players under 800 leave mate in one in about 7 blitz games out of 100, and players over 2000 in about 1.
Free material: everyone takes it, strong players skip it better
| When an enemy piece was free (rapid) | Under 800 | 800–1199 | 1200–1599 | 1600–1999 | 2000+ |
|---|---|---|---|---|---|
| Taken | 62% | 68% | 74% | 75% | 75% |
| When skipped, share that were slips | 31% | 27% | 23% | 18% | 13% |
From 1200 up, players take free material at the same rate, about three times in four. So "spotting free pieces" isn't what separates a 1300 from a 2000. What does is the skip: when a 2000+ player passes up a free piece, it's usually because taking it loses something. When an under-800 player passes it up, it's more often an oversight.
What to work on
- Look at every check, yours first. Before each move, list the checks you can give. That alone finds most mates in one, and it's the cheapest habit in chess.
- Then every check your opponent can give. That's the defensive half: it stops most allowed mates.
- When something's free, ask one question before taking or skipping it: what happens after the capture? If you can't see a reason not to, take it.
- When you're winning, look for the finish. Missed mates rarely lose on the spot, but long games give your opponent chances.
In your report: the mate-in-one finding counts how often you found the mates you were given, next to players at your rating. "Practice this" sets up the ones you missed.
Common questions
How often do players miss mate in one? In rapid, players under 800 walk past a mate in one about 10 times per 1,000 moves; players over 2000, less than once. In blitz, the typical under-800 player plays about 45% of the mates in one they're given, and the typical 2000+ player about 76%.
How do I get better at spotting checkmate? Before every move, list every check you can give, then every check your opponent can give. That finds most mates in one and stops most allowed ones.
Should I always take a free piece? Usually. From 1200 up, players take free material about three times in four. Strong players skip it when taking loses something, so before capturing, ask what happens after the capture.
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 (mates found, mates left in games that weren't already lost, how losses ended) come from 19,959 games by 100 public Lichess players, 20 per rating group.
- "Free" is counted by attackers and defenders; some free pieces are traps, which is why skipping can be right.
- Written and counted by Plysight. Updated twice a year.
See what you walk past. Your last 200 games from chess.com or Lichess, or a PGN file. Free, no account.