chess.com / Player A · 10,837 games · Stockfish 19 on the latest 2,000 (Mar 9 2025 – Sep 20 2026)

You don’t need more chess knowledge. You need to look before you move.

10,752 of your games are blitz, 93% of them 3+0. Your rating has lived between 800 and 1,080 since 2020. The engine says why, and it is mostly one habit.

79.7%your accuracy — opponents’: 79.6%. You are exactly as good as the people you play.
2.3game-changing mistakes per game (≥20 win-% lost in one move)
3.2 smedian think time in the middlegame. 1.4 s in endgames.
382games lost after being +5 or better — 38% of all your losses
Last 30 & 90 days

Improving, or lucky?

Rating: 799 → 1,039 in 90 days. Move quality: unchanged. Accuracy, blunder rate and opening results are statistically identical to the prior nine months. What changed is that you now save more lost games (26% → 38%, p = 0.001) — real fighting spirit plus generous opponents, not better chess. A 200-point swing inside 90 days has happened in half of all 90-day windows since 2020. Expect it to fade unless the habits below change.
MetricLast 30dLast 90dPrior 9 moRead
Results
Games170413953
Rating, start → end930 → 1039799 → 10391013 → 791up
Score53.8%53.3%48.1%p = 0.08, not significant
Skill — what the engine sees
Your accuracy79.079.780.1flat (p = 0.36)
Opponents’ accuracy79.179.680.3flat
Big mistakes per 40 moves3.002.892.83flat (p = 0.81)
Opponent blunders you punish60%58%58%flat
Eval at move 10 as Black−2.1−1.8−2.0flat — still bad
More accurate than opponent47%47%46%flat
Resilience & luck
Score after being −5 or worse37.8%37.5%26.2%real change (p = 0.001)
Score after reaching +571.9%72.2%65.8%borderline (p = 0.055)
Wins that came from a lost position47%47%33%half your wins are comebacks
Wins on the clock while losing on the board14%12%9%flag luck rising

Rating, rolling 50-game average

Same band for 18 months. The current climb starts from the lowest trough in the sample.
80085090095010001050last 90dlast 30dMar 2025Jul 2025Oct 2025Jan 2026Apr 2026Jul 20261004

Accuracy, rolling 50-game average

If you were improving, the blue line would pull away from the orange one. It never has.
YouOpp
7678808284last 90dlast 30dMar 2025Jul 2025Oct 2025Jan 2026Apr 2026Jul 2026You 79.0Opp 79.6

Credit where due: not resigning and fighting on is a skill, and it is paying. But it is a skill that depends on opponents erring back. Both players reach +5 in over 60% of your games — these are coin-flip brawls. Fewer blunders is the only durable way up.

What the engine found · 4,606 big mistakes classified

Six leaks, ranked by rating points

Every position below is from your own games in the last 120 days. Decide first, then open the answer and step through what you played and what was best with the ← → buttons (or your arrow keys). Red arrows show what went wrong, green arrows what was best.

1 · One-move oversights

1,081 mistakes · 23% of all

460 times you ignored a piece that was already attacked. 427 times you moved a piece onto an attacked square. 146 times you walked into mate in 1–3. Your blunder rate is the same with 90+ seconds on the clock (7.4 per 100 moves) as with under 10 (6.1) — this is not time trouble. It is not looking.

White to move · Move 9 · 2:53 on your clock · you were +4.8Before grabbing b5 — what is Black threatening? You played axb5??
White to move · Move 15 · 1:47 on your clock · you were +8.4A free rook on a8. What did the last move (…Ng4) threaten? You played Nxa8??
White to move · Move 22 · 1:42 on your clock · you were +6.3You want Nf5 and mate on g7. What is attacked right now? You played Nf5??
Black to move · Move 20 · 1:47 on your clock · you were +2Your queen and the f1-bishop are on the same diagonal. You played …O-O-O??

2 · Not taking what’s offered

1,704 missed punishments · you cash in only 58% of opponent blunders

243 free pieces left on the board. 19 mates-in-one not played. Opponents blunder as often as you do; whoever notices first wins. Before every move: checks, captures, threats — for both sides.

White to move · Move 4 · your own pet lineYou play Bc4 + Qf3 for one reason. Do it. You played Nc3
Black to move · Move 18 · 2:03 on your clockChecks first. You played …f5
Black to move · Move 3 · 2:59 on your clockWhite just played Bf4. Look at every capture. You played …Qc6
Black to move · Move 8 · 2:44 on your clockWhite just played Ng5. Is it defended? You played …a5
White to move · Move 32 · 0:43 on your clockChecks first. You played g4??

3 · Openings that start you in a hole

As Black: −1.8 average by move 10 · ≥1.5 pawns down in 46% of games

As White you are fine on average (+0.2) except for the Qf3/Qh5 sorties. As Black you are regularly lost before the middlegame: early …Qf6, the Scotch (−2.8), the London (−2.7), generic 1.d4 (−2.2), Italian (score 32%). In a quarter of all games your first blunder comes before move 10.

White to move · As White · played 20 times · costs 37 win-% each timeBlack defended f7 with …Nf6. Your usual move is Qb3. Why is it bad? You played Qb3??
White to move · As White · King's Gambit · played 5 times · costs 43 win-% each timeWhy can you never take on e5 here? You played fxe5??
Black to move · As Black · played 26 times (…Qf6 on move 2)How do you defend e5? You played …Qf6
Black to move · As Black vs the Scotch · your worst common opening (−2.8 by move 10)You traded knights on d4 and the queen recaptured. You play …c5 to kick it. You played …c5

4 · Not converting won games

Reached +5 in 1,220 games · lost 382 · drew 40

164 of those losses were on time, 163 by checkmate. When you are winning you keep attacking at 2 seconds a move instead of trading down and checking your own king. 35% of your big mistakes are made from positions that were already winning.

White to move · Move 23 · 2:02 on your clock · forced mate on the boardKing on f8, your queen on g6, knight on f7. Finish it. You played Rae1
White to move · Move 23 · 1:52 on your clock · you were +6You are in check from the f2-bishop. Three legal replies. Which? You played Kh1??
Black to move · Move 18 · 1:47 on your clock · you were +7.9Your bishop attacks the white queen. The knight on h2 attacks your bishop. You played …Qg5??

5 · Two-move tactics: forks, loose pieces, f2/f7

≈1,900 mistakes punished by a short tactic

Most common punishers: capture sequences on under-defended pieces (653), attacks on pieces with no retreat (651), checks (297), forks (270). Your puzzle rating (≈1,600) says you can find these when told one exists. In games nobody tells you.

Black to move · Move 10 · 2:40 on your clockA white knight sits on d5. Which square must you always check? You played …b4??
White to move · Move 12 · 2:34 on your clockYour king is still on e1, the f-file is open for Black. What is loose? You played Bd3??
White to move · Move 11 · 2:45 on your clock · you were +8Your Bc4 + Qb3 battery points at f7. Black king g8, rook e8. You played d4

6 · Endgames played at 1.4 seconds a move

Score in 40+ move games: 38% · entered winning endgames: only 71%

You reach move 40 with 37 seconds on average and lose 38 clearly winning endgames on time. 85% of endgame mistakes are in rook or rook-plus-minor endings: passive king, rook behind nothing, missed back-rank and edge mates.

White to move · Move 32 · 1:09 on your clock · rook endingBlack king on h6, your rook on g4 cuts the g-file. You played f5
White to move · Move 35 · 1:01 on your clock · rook ending, +3b3 is going to fall either way. What is your worst-placed piece? You played h4
Lesson plan · 8 weeks · ~30 minutes a day

The plan

Five rules, starting today

  1. The 3-second blunder check. Before releasing any move: “What did his last move attack? What can he check or capture after mine?” You have the time — at move 20 you still hold 104 of 180 seconds.
  2. Checks, captures, threats — his first, then yours. Every move, especially right after the opponent moves a piece next to your king or queen.
  3. Play 5+3 or 10+0 for the next 8 weeks. At most one 3+0 session a week. You cannot build a look-first habit at 3 seconds a move. 10,000 games of 3+0 have produced zero rating change.
  4. When +3 or more: trade pieces, not pawns; king safety first; no new adventures.
  5. Stop after two losses in a row (you score 40–48% after 2–3 straight losses), and max 6 games per session (game 7+ scores 45%).

Week by week

Each week has a board. Pick a tab, then step through it with ← → or your arrow keys. Every line was checked for legality; the two basic mates are Stockfish’s own play.

Weeks 1–2 · Leak 1 + 2

Board vision

Start · White to move

Your game, move 8. You are +2.5. Before moving: what did his last move attack?

  • Daily 15 min: Lichess puzzle themes Hanging piece, Mate in 1, Mate in 2. Untimed, aim 95% correct — accuracy over speed.
  • Daily 5 min: for each puzzle position, first name every undefended piece on both sides.
  • 2–3 games of 10+0. After each: find your first big mistake with Game Review and write which rule it broke.
Target: big mistakes ≤ 2.4 / 40 moves (now 2.9)
Week 3 · Leak 3

A repertoire you can’t lose from

Start · White to move

Your new White opening. Same setup every game.

  • Step through all five tabs until you can play each line from memory, then play them out against a level-3 bot.
  • White: the Italian setup. Delete Qf3, Qh5 and Qb3. If you keep the King’s Gambit, the knight comes out before anything is captured.
  • Black: knight defends e5, bishop to c5, castle. One setup against every 1.d4.
  • Rule: no queen move before move 8 unless it wins material or the line above says so.
Target: eval at move 10 as Black ≥ −0.7 (now −1.8)
Weeks 4–5 · Leak 5

Two-move tactics

Start · White to move

King behind three unmoved pawns, no rook guarding the back rank.

  • Daily 20 min puzzles by theme, one theme per 2 days: Fork, Pin, Trapped piece, Discovered attack, Removing the defender, Back-rank mate, Kingside attack (h7/f7).
  • Learn the 10 basic mate patterns (back rank, smothered, Anastasia, Arabian, Qh7/Qg7 support mates, Légal, Scholar’s, Greek gift idea).
  • In games: whenever a knight reaches your 4th/5th rank, check its fork squares.
Target: punish ≥ 68% of opponent blunders (now 58%)
Week 6 · Leak 4

Winning won games

Start · White to move

Box the king in with the queen a knight-move away, bring your king, mate. Drill until it takes under 30 seconds.

  • Play 10 “+5” positions from your own lost games against Stockfish level 4–5 until you win each twice.
  • Drill: K+Q vs K and K+R vs K mates in under 30 seconds each, five times daily. You drew 5 games by stalemating.
  • Checklist when ahead: is my king safe → what can I trade → what is his only threat.
Target: score from +5 ≥ 80% (now 67–72%)
Week 7 · Leak 6

Endgames that actually occur

Start · White to move

King on the 6th rank ahead of its pawn always wins.

  • Silman’s Complete Endgame Course, parts for beginner → class C only: opposition, square of the pawn, rook behind passed pawns, Lucena and Philidor ideas, king activity.
  • Lichess Practice: Rook endgames, Pawn endgames basics.
  • Clock rule: keep ≥ 60 s for move 30+. Spend less in the opening (you now know it) — not less in the endgame.
Target: 40+ move games ≥ 48% (now 38%)
Week 8 · Re-measure

Audit again

  • Play 40 games at 5+3.
  • Re-run this exact analysis on them. If accuracy is ≥ 82 and blunders ≤ 2.4 / 40, the gain is real and 1,150–1,200 follows. Then go back to 3+0 if you like.
  • If not: repeat weeks 1–2. That habit is worth more than everything else combined.
Pass mark: accuracy gap vs opponents ≥ +2 (now +0.1)

Rough value of each fix, from your own numbers: converting +5 positions at 80% instead of 67% is worth ≈ +55 Elo. Reaching the middlegame level as Black instead of −1.8 is plausibly worth as much, and halving one-move oversights likely more than both.

Method

All games from the chess.com public API. Stockfish 19, 150k nodes per position, every position of the latest 2,000 blitz/rapid games (≈130k positions). Mistake = ≥20 win-percentage points lost in one move (Lichess win-% model); accuracy uses the Lichess formula, so numbers differ slightly from chess.com’s CAPS. Motif tags are heuristic. Significance: Welch z-test, last 30/90 days vs days 91–365. Older games (2009–Feb 2025) were used for opening, time-of-day and streak statistics only.