---
title: "Magnus Carlsen blitz analysis: Stockfish on 2,000 games"
description: "Your edge shows up everywhere. It is thinnest in the endgame. A free Chess Goat report on Magnus Carlsen's public chess.com games: improving or lucky, leaks ranked by rating points, and their best moves."
canonical: "https://trychessgoat.com/r/magnuscarlsen-b4876e03/"
last_updated: 2026-10-09
---

chess.com / MagnusCarlsen · 6,902 games · Stockfish 19 on the latest 2,000 (Mar 23 2025 – Sep 24 2026)

# Your edge shows up everywhere. It is thinnest in the endgame.

Almost everything you play is blitz, and 65% of it is 3+0. Over the last 90 days your rating went from 3384 to 3394, and your accuracy led your opponents’ 92.7 to 90.2. We ranked six leaks by the rating points each costs you beyond what it costs your opponents in the same games. At all six you lose the same or less than they do. So #1 is not a weakness. It is where your edge is smallest: the endgame, where you and your opponents both give up about 7 points.

93.6%your accuracy, last 30d. Opponents: 90.2%. You outplay them in 82% of games.

42%of your big mistakes are made from winning positions: 445 of 1,070

0:49median clock when you blunder a winning position

52games lost after being +5 or better, 15% of all your losses

## The short answer

**Analysed:** MagnusCarlsen’s chess.com blitz games: 6,902 games · Stockfish 19 on the latest 2,000 (Mar 23 2025 – Sep 24 2026). Report date: September 24, 2026.

**Verdict:** Holding steady at the top. Last 90d vs Prior 9 mo: accuracy 92.7 vs 92.7 (p = 0.97); big mistakes per 40 moves 0.50 vs 0.49 (p = 0.74); score 76.6% vs 76.7% (p = 0.95). Wins from lost positions: 2% vs 4%, so none of it is luck. The last 30 days are sharper: accuracy 93.6 (p = 0.017) and 0.27 big mistakes per 40 moves (p < 0.001), but that is only 73 games.

**Biggest leaks:**

1.  [Endgames: the last point](https://trychessgoat.com/#leak-endgame): 403 endgame mistakes · 49% in rook+minor endings · ≈7 rating points, same as your opponents
2.  [Openings that start you in a hole](https://trychessgoat.com/#leak-opening): White: +0.4 by move 10 · Black: −0.3 · ≈16 rating points, 3 fewer than your opponents
3.  [One-move oversights](https://trychessgoat.com/#leak-oversight): ≈119 mistakes · 11% of all · ≈12 rating points, 5 fewer than your opponents

[Free Goat Card for MagnusCarlsen](https://trychessgoat.com/u/magnuscarlsen) · [How to review your own games for free](https://trychessgoat.com/improve/free-game-review/) · [Time pressure in chess, measured](https://trychessgoat.com/improve/time-pressure-data/)

At a glance · Last 90d vs. Prior 9 mo

## Your game at a glance

-   Openings3,110▼ 20
-   Tactics3,470▲ 10
-   Strategy3,250■ 0
-   Endgames3,260▼ 10
-   !!Brilliant moves306in 2,000 games

Each number is the rating of a player who plays that part of the game the way you do: your opponents’ average rating (3,116), adjusted by how much win-% you lose per move there compared with them, in the same games. Arrows: the change against your opponents compared with Prior 9 mo; grey means it is within the noise. A **brilliant move** is the engine’s top choice that gives up at least two points of material.

Last 30d & Last 90d vs. Prior 9 mo

## Improving, or lucky?

**Holding steady at the top.** Last 90d vs Prior 9 mo: accuracy 92.7 vs 92.7 (p = 0.97); big mistakes per 40 moves 0.50 vs 0.49 (p = 0.74); score 76.6% vs 76.7% (p = 0.95). Wins from lost positions: 2% vs 4%, so none of it is luck. The last 30 days are sharper: accuracy 93.6 (p = 0.017) and 0.27 big mistakes per 40 moves (p < 0.001), but that is only 73 games.

Metric

Last 30d

Last 90d

Prior 9 mo

Read

Results

Games

73

258

1,061

Rating, start → end

3312 → 3394

3384 → 3394

3334 → 3381

flat

Score

84.2%

76.6%

76.7%

flat (p = 0.95)

Skill: what the engine sees

Your accuracy

93.6

92.7

92.7

flat (p = 0.97)

Opponents’ accuracy

90.2

90.2

90.3

flat

Big mistakes per 40 moves

0.27

0.50

0.49

flat (p = 0.74)

Opponent blunders you punish

88%

73%

78%

worse

More accurate than opponent

82%

74%

78%

worse

Eval at move 10 as White

+0.6

+0.4

+0.4

flat

Eval at move 10 as Black

−0.1

−0.5

−0.3

flat

Conversion & luck

Score after reaching +5

95.5%

96.3%

94.7%

flat

Score after being −5 or worse

0.0%

11.4%

19.9%

saving fewer

Losses that were +5 at some point

22%

10%

16%

better

Wins that came from a lost position

0%

2%

4%

flat

Wins on the clock while losing on the board

0%

1%

1%

flat

Losses on time

33%

15%

22%

better

### Rating, rolling 50-game average

A slow, steady climb. Rolling 50-game average: 3248 → 3374.

### Accuracy, rolling 50-game average

The blue line (you) stays above the orange one (your opponents) the whole way. Now: you 93.8, opponents 90.2.

YouOpp

### Your clock: wins vs losses

Time left on your clock after your move, in the games you won and the games you lost.

1.  Move 20
    
    Wins2:03
    
    Losses1:52
    
    11 seconds apart: 2:03 in your wins, 1:52 in your losses. Medians over your 3+0 games (928 wins, 249 losses).
    
2.  Move 30
    
    Wins1:18
    
    Losses1:04
    
    The gap grows to 14 seconds: 1:18 in wins, 1:04 in losses (733 wins, 213 losses). In 3+0 that is the time for a few careful endgame moves.
    

Nothing in the trend needs fixing. At this level the points left are small and specific, and the leaks below show where. Judge the last 30 days on your next 50 games before you trust them.

Strengths

## What you do well

Not everything is a leak. These parts of your game already work, measured the same way as the leaks below: against your opponents, in the same games.

-   **Tactics: 3,470**354 above your opponents’ average of 3,116: you see and play tactics better than players at your level.
-   **Tactical defence**Short combinations cost you less than they cost your opponents: ≈28 points, against ≈69.
-   **Closing out wins**You close out won games better than your opponents do: ≈14 points lost from winning positions, against ≈33.
-   **Punishing mistakes**You cash in on their mistakes more often than they cash in on yours: ≈22 points lost there, against ≈28.
-   **Few pieces hung**You hang pieces less often than your opponents: one-move oversights cost you ≈12 rating points, them ≈17.

### Your best moves

White to move · Move 19 · 2:05 on your clock · you were +4.2You found a strong sacrifice here: it leaves your queen en prise. Can you find it again? 

White to move · Move 25 · 0:18 on your clock · you were +2.4You found a strong sacrifice here: it leaves your queen en prise. Can you find it again? 

White to move · Move 22 · 1:19 on your clock · you were +2.1You found a strong sacrifice here: it leaves your queen en prise. Can you find it again? 

What the engine found · 1,070 big mistakes classified

## 6 leaks, ranked by rating points lost beyond your opponents

Each leak is ranked by the rating points it costs you _beyond_ what it costs your opponents in the same games. You are level with them or better at every one, so read the list as “where your edge is thinnest”, not “what is broken”. Every position below is from one of your own games in the last 365 days. Decide on your move first. Then open the answer and step through what you played and what was best with the ← → buttons (or your arrow keys).

### 1 · Endgames: the last point

403 endgame mistakes · 49% in rook+minor endings · ≈7 rating points, same as your opponents

> In order to improve your game you must study the endgame before anything else; for, whereas the endings can be studied and mastered by themselves, the middlegame and the opening must be studied in relation to the endgame.

— José Raúl Capablanca[Wikiquote](https://en.wikiquote.org/wiki/Jos%C3%A9_Ra%C3%BAl_Capablanca)

59% of your games reach an endgame. From a winning one you score 95%. Endgames cost you ≈7 rating points, exactly what they cost your opponents in the same games. Everywhere else you gain on them; here you only break even. 49% of your 403 endgame mistakes come in rook+minor endings. You lost 7 winning endgames on time. Three of the four positions below were played with 21 seconds or less on your clock.

Coach’s notes

1Why it happens

Your endgames are sound; they are just played on almost no time. At move 40 your clock reads 0:51, and your median endgame move takes 1.1 seconds. Two of the four positions above were a mate in one and a free knight, both missed with 21 seconds or less.

2The habit

When the queens come off, spend your time once: **name the winning plan and his only counterplay**. Then play the technique fast.

3The drill

Once a week, take one rook+minor ending from your own games where you were winning and play it out against the engine from that position, with the clock you had. For the theory behind them: Dvoretsky’s _Endgame Manual_ and Müller and Lamprecht’s _Fundamental Chess Endings_.

4What success looks like

Convert at least **96%** of your winning endgames (now 95%).

White to move · Move 52 · 0:21 on your clock · you had mate in 1Rook ending, 21 seconds left. A free rook is on g5. Is there something better? You played Rxg5??

White to move · Move 65 · 0:03 on your clock · you were +6.2Knight ending, 3 seconds left. Both knights are attacked. Which capture first? You played Kxa3??

Black to move · Move 32 · 1:29 on your clock · you were +6.0Your move as Black, +6.0. White’s bishop on g3 is attacked. Take it or keep the rooks? You played …Rg8??

White to move · Move 48 · 0:09 on your clock · you were +3.0You are +3.0 with 9 seconds left. Look at the f-file before you move a bishop to it. You played Bf4??

Practice this: [Converting a won game: trade pieces, not pawns →](https://trychessgoat.com/learn/#/lesson/converting)

### 2 · Openings that start you in a hole

White: +0.4 by move 10 · Black: −0.3 · ≈16 rating points, 3 fewer than your opponents

> You should keep in mind no names, nor numbers, nor isolated incidents, not even results, but only methods.

— Emanuel Lasker[Wikiquote](https://en.wikiquote.org/wiki/Emanuel_Lasker)

By move 10 you are +0.4 as White and −0.3 as Black. In 4% of your Black games you are already 1.5 pawns down, against 1% as White. That costs ≈16 rating points, 3 fewer than your opponents lose to their openings. The repeats are easy to price: 1…f5 after 1.e4 Nc6 2.Nf3 (7 games, about 10 win-% each), 1…b5 against 1.d4 (6 games, 9%), 1.f3 and 1.Nh3 (3 games each, 8%).

Coach’s notes

1Why it happens

Your openings don’t lose games: you score 76% as Black and 79% as White. The gap is at move 10, −0.3 as Black against +0.4 as White, and a few offbeat first moves you play again and again. Each one costs you about 8–10 win-% in the first two moves.

2The habit

For every offbeat first move you keep playing, **know the critical reply and your answer to it**. All four positions above turned on a single point by move 12: a recapture, a count on e5, a defender, a cleared rank.

3The drill

Engine and database on your worst named lines: the Rossolimo (14 games, 68%) and the Najdorf (−0.29 at move 10) as Black, the Sämisch Nimzo-Indian (15 games, 60%) as White. Follow your own games to the move where they leave theory and check the critical branches at depth.

4What success looks like

Average eval at move 10 as Black at or above **−0.3** (now −0.3).

White to move · Move 12 · 2:30 on your clock · level positionMove 12 as White. Black’s bishop just took your knight on c3. You played b3??

Black to move · Move 12 · 2:25 on your clock · you were +5.0Move 12 as Black, you are +5.0. Count the attackers on White’s e5-knight. You played …Be6??

Black to move · Move 12 · 1:45 on your clock · level positionMove 12 as Black. White’s queen on a7 and bishop on b5 point at your king. What do you need first? You played …Nfg4+??

Black to move · Move 9 · 2:28 on your clock · you were +5.8Move 9 as Black, you are +5.8. Your queen on b4 and White’s bishop on h4 share a rank. What is in the way? You played …Nc6??

Study with

-   [Lichess Analysis board + Opening Explorer](https://lichess.org/analysis)practiceMaster database and cloud engine on one board: enough to check your own lines to the move where they leave theory.

Practice this: [Opening rules that win games →](https://trychessgoat.com/learn/#/lesson/opening-rules)

### 3 · One-move oversights

≈119 mistakes · 11% of all · ≈12 rating points, 5 fewer than your opponents

> Mistrust is the most necessary characteristic of the Chess player.

— Siegbert Tarrasch[Wikiquote](https://en.wikiquote.org/wiki/Siegbert_Tarrasch)

One-move oversights are rare in your games: ≈119 in 2,000, 11% of your big mistakes, and they cost you 5 rating points fewer than your opponents lose to theirs. 72 times a piece went to a square where it could be taken; 39 times an attacked piece stayed where it was. The clock explains most of them: 0.6 big mistakes per 100 moves with more than 90 seconds left, 3.7 with under 10. All four positions below came with 37 seconds or less.

Coach’s notes

1Why it happens

You see these with time. Your big-mistake rate is six times higher under 10 seconds (3.7 per 100 moves) than above 90 seconds (0.6). The check disappears when the clock gets low.

2The habit

Under 20 seconds, one question before you let go: **“What can reach the square I just moved to, and what did I leave?”**

3The drill

Turn your ≈119 oversights into a flashcard set: each position with 5 seconds to name what the moved piece left loose or walked into. Twice a week, until you get them all.

4What success looks like

Big mistakes at or below **0.4** per 40 moves (now 0.50), measured on your next 50 games.

White to move · Move 27 · 0:16 on your clock · you were +2.0Your e-pawn promotes with a discovered check from the a7-rook. Which piece do you make? You played e8=Q+??

White to move · Move 77 · 0:03 on your clock · level positionRook ending, 3 seconds left. Where can Black’s bishop reach? You played Rf5??

White to move · Move 43 · 0:05 on your clock · you were +1.3Black’s queen on h4 is free. What is Black’s bishop on f3 attacking? You played gxh4??

Black to move · Move 23 · 0:37 on your clock · level positionYour move as Black. Before you trade bishops on d4, what does that bring to d4? You played …Bxd4??

Practice this: [The blunder check →](https://trychessgoat.com/learn/#/lesson/blunder-check)

### 4 · Not taking what’s offered

307 missed punishments · 25 free pieces · 4 mates · ≈22 rating points, 6 fewer than your opponents

> I have a weakness for any piece in excess of my opponent's numbers - from pawn to queen.

— Tigran Petrosian[Wikiquote](https://en.wikiquote.org/wiki/Tigran_Petrosian)

Your opponents hand you material, and 73% of the time you take it (88% in the last 30 days). The misses cost ≈22 rating points, 6 fewer than your opponents lose on theirs. 25 of the 307 were free pieces, 4 were mates. 172 of the winning moves were quiet, neither a check nor a capture, and 73 of those attacked a piece with nowhere to go.

Coach’s notes

1Why it happens

In fast games the winning reply is often quiet: 172 of your 307 misses were neither a check nor a capture. The forcing moves get looked at first, and the quiet win is not among them.

2The habit

When his move looks like an error, **look for the quiet move first**: the piece with no retreat, the move that takes a square. 73 of your misses attacked a trapped piece.

3The drill

Aagaard’s _Grandmaster Preparation: Calculation_, the candidate-moves chapters: two positions a day, written out in full before you check. Then the 307 missed punishments from your games, 30 seconds each.

4What success looks like

Punish at least **80%** of your opponents’ blunders (now 73%).

White to move · Move 59 · 0:04 on your clock · you were +6.5You are +6.5 with 4 seconds left. Black’s bishop is on c2 and his king on f2. One move hits both. You played Rg4??

White to move · Move 92 · 0:03 on your clock · you had mate in 10Rook ending, 3 seconds left. The two rooks attack each other. You played Rh2??

Black to move · Move 40 · 1:21 on your clock · you were +5.3Your move as Black, +5.3. White’s queen on d2 and knight on e3 are both on knight squares. You played …a4??

White to move · Move 66 · 0:22 on your clock · level positionQueen ending, level. Black’s a-pawn is one step from a2. What happens after your check on g8? You played Qg8+??

Practice this: [Is it really safe? Counting attackers and defenders →](https://trychessgoat.com/learn/#/lesson/count-defenders)

### 5 · Giving back won games

Reached +5 in 1,364 games · lost 52 · drew 30 · ≈14 rating points, 19 fewer than your opponents

> First restrain, next blockade, lastly destroy.

— Aron Nimzowitsch[ChessBase](https://en.chessbase.com/post/edward-winter-s-che-explorations-11-)

You reached +5 in 1,364 games and lost 52 of them. 42% of your big mistakes come from winning positions, at a median 0:49 on your clock. Your opponents give back more: this leak costs you 19 rating points fewer than it costs them. 32 of the 52 losses from +5 ended on time. Three of the four positions below were forced mates.

Coach’s notes

1Why it happens

When you are winning, your opponents’ only chances are a check and the clock. 32 of the 52 games you lost from +5 ended on time, and the median clock when you blunder a winning position is 0:49.

2The habit

Winning with little time: **if you see a forcing finish, play it; otherwise take away their checks**. Trade queens when it costs nothing.

3The drill

Spar the engine at 3+0 from the moment you reached +5 in your own games, the positions above and the 52 losses, with the clock you had. The task is to win without allowing a check through.

4What success looks like

Score at least **97%** after reaching +5 (now 96%).

White to move · Move 47 · 0:14 on your clock · you had mate in 10You have mate, 14 seconds left. Black’s queen and rook are next to your king. Who checks first? You played Kg3??

White to move · Move 68 · 0:02 on your clock · you had mate in 1You have mate in one, 2 seconds left. You played Kg6??

Black to move · Move 41 · 0:07 on your clock · you had mate in 8You have mate in 8 as Black, 7 seconds left. Which check first? You played …Rf1+??

Black to move · Move 44 · 0:40 on your clock · you were +5.0You are +5.0 as Black. White’s knight on h2 stands in front of the h1-rook. What does it threaten? You played …Rh6??

Practice this: [Converting a won game: trade pieces, not pawns →](https://trychessgoat.com/learn/#/lesson/converting)

### 6 · Two-move tactics against you

≈377 mistakes punished by a short combination · ≈28 rating points, 41 fewer than your opponents

> Strategy requires thought, tactics require observation.

— Max Euwe[Chess Notes (Edward Winter)](https://www.chesshistory.com/winter/extra/strategytactics.html)

Short combinations against you: checks (98), capture sequences (95), attacks on pieces with no retreat (71), forks (49). This is your largest cost in raw points, ≈28, and also your biggest edge: your opponents lose 41 more rating points to the same thing in the same games.

Coach’s notes

1Why it happens

These combinations are short, and most start with a forcing move: 98 of them with a check, 95 with a capture sequence. In the positions above, three of the four started with a capture of your own: …exf5, Bxe7, Qxd4.

2The habit

Before a capture in a sharp position, ask **“What is their most forcing reply?”** Check it first.

3The drill

Composed studies and the opponent’s-resources chapter of Aagaard’s _Calculation_: in each position, find the defender’s most forcing reply before you choose your own move. 15 minutes, twice a week.

4What success looks like

At the next audit, no more than **23%** of your big mistakes come from a short combination (now 35%).

Black to move · Move 30 · 1:10 on your clock · you were +2.6Your move as Black, +2.6. White’s pawn on f5 is free. What does taking it open? You played …exf5??

Black to move · Move 26 · 2:27 on your clock · level positionWhite’s bishop on f7 gives check. Take it or step aside? You played …Kf8??

White to move · Move 36 · 0:01 on your clock · level positionOne second on your clock. Before you trade bishops on e7, what can the c6-pawn take? You played Bxe7??

White to move · Move 33 · 0:35 on your clock · level positionThe d4-pawn is free. Where does Black’s e3-knight go if your queen takes it? You played Qxd4??

Practice this: [Forks: one piece, two targets →](https://trychessgoat.com/learn/#/lesson/forks)

Lesson plan · 8 weeks · ~30 minutes a day

## The plan

### Four rules, starting today

1.  **Rook+minor endings.** 49% of your 403 endgame mistakes come there. Winning endgames converted: 95%.
2.  **The clock decides the won games.** 32 of your 52 losses from +5 ended on time. Median clock when you blunder a winning position: 0:49. At move 30 you have 1:18 in wins, 1:04 in losses.
3.  **Black prep.** As Black you are −0.3 by move 10, against +0.4 as White. Start with the Rossolimo and the Najdorf.
4.  **Session length.** Over your last 2,000 games you score 82% in the first three games of a session and 71% in games 10–12. After two losses in a row: 72%.

Your in-game checklist

### Before every move

1.  Winning, under a minute: take away their checks.
2.  Before a capture: what is their most forcing reply?
3.  Their mistake? Look for the quiet move and the trapped piece.
4.  Queens off: name the plan once, then play fast.

Chess Goat · trychessgoat.com

### Week by week

Weeks 1–2 · Leaks 3 + 4

### Your own positions, at your own clock

Start · Black to move

Your game, move 32. You were +5.0. What was the threat?

-   Build one file from your games: the 52 losses and 30 draws from +5, plus every position in this report. Run each at depth and mark the move where the eval left +5.
-   Daily 15 min: play 5 of those positions out against the engine from the side you had, with the clock you had. All four oversights above came with 37 seconds or less.
-   Daily 15 min: two exercises from Aagaard’s _Grandmaster Preparation: Calculation_. Write the full line, their best defence included, before you check.
-   Games: 3+0, rated. After each session, find the first move in each loss where the eval dropped and note your clock at that moment.

Target: big mistakes ≤ 0.4 per 40 moves (now 0.50)

Week 3 · Leak 2

### Black prep: Rossolimo, Najdorf, offbeat first moves

Start · Black to move

Move 12 as Black. White’s queen on a7 and bishop on b5 point at your king. What do you need first?

-   As Black against the Rossolimo: 14 games, 68%. In the Najdorf: 15 games, −0.29 at move 10, though you still score 80%. Take the lines from your own games through a large database to where they leave theory, then check the critical branches with the engine at depth.
-   As White, the Sämisch Nimzo-Indian: 15 games, 60%, your lowest score among your regular White lines. Same method.
-   Your offbeat first moves each cost about 8–10 win-% by move 2: 1…f5 after 1.e4 Nc6 2.Nf3 (7 games), 1…b5 against 1.d4 (6), 1.f3 and 1.Nh3 (3 each). If you keep them, prepare the critical reply to each, so the cost stops there.
-   Play 20 rated games as Black this week (your Black score: 76%).

Target: eval at move 10 as Black ≥ −0.3 (now −0.3)

Weeks 4–5 · Leaks 4 + 6

### Calculation: quiet wins and their forcing replies

Start · Black to move

Your move as Black, +5.3. White’s queen on d2 and knight on e3 are both on knight squares.

-   172 of your 307 missed punishments were quiet moves; 73 attacked a piece with nowhere to go. Daily 20 min: Aagaard’s _Calculation_, the chapters on candidate moves and on the opponent’s resources.
-   Twice a week: one composed endgame study, solved from the diagram without moving the pieces. The key move is usually quiet, which is the move you miss.
-   In your games: before a capture in a sharp position, name their most forcing reply. 98 of the combinations against you started with a check, 95 with a capture sequence.

Target: punish ≥ 80% of opponent blunders (now 73%)

Week 6 · Leak 5

### Converting +5 on a short clock

Start · White to move

You have mate, 14 seconds left. Black’s queen and rook are next to your king. Who checks first?

-   32 of your 52 losses from +5 ended on time. The median clock when you blunder a winning position is 0:49.
-   Daily 10 min: spar the engine from your own +5 positions (above, and the 52 losses) at 3+0, with the clock you had. The task is to win without letting a check through.
-   Winning with under a minute: a forcing finish if you see one; otherwise the move that takes away their checks, even if it is slower on the board.
-   You drew 8 winning games by stalemate or insufficient material. When his side is down to a few pieces, count his legal moves before you move.

Target: score from +5 ≥ 97% (now 96%)

Week 7 · Leak 1

### Rook+minor endings

Start · Black to move

Your move as Black, +6.0. White’s bishop on g3 is attacked. Take it or keep the rooks?

-   199 of your 403 endgame mistakes came in rook+minor endings, 91 in pure rook endings. Collect the rook+minor positions from your games where the eval dropped and play each out against the engine at the clock you had.
-   Dvoretsky’s _Endgame Manual_, the chapters on rook against minor piece and on rook with minor pieces. Müller and Lamprecht’s _Fundamental Chess Endings_ as the reference when a position from your games is unclear.
-   Shereshevsky’s _Endgame Strategy_ for improving pieces before committing. At move 40 your clock reads 0:51 and your median endgame move takes 1.1 seconds: spend the time once, on the move that changes the pawn structure or trades a piece.

Target: winning endgames converted ≥ 96% (now 95%)

Week 8 · Re-measure

### Audit again

-   Play 60 rated 3+0 games, half of them as Black.
-   Re-run this analysis on them. You pass if big mistakes are ≤ 0.4 per 40 moves (now 0.50) and you score 97% from +5 (now 96%).
-   If you don’t pass, repeat weeks 1–2 with the new positions.

Method

Games: the latest 2,000 blitz games from the chess.com public API (Mar 23 2025 – Sep 24 2026). Engine: Stockfish 19, 40,000 nodes per position; puzzle lines at 3,000,000. Win% model and accuracy formula: lichess. A **big mistake** loses ≥ 20 win-% in one move. Rating-point costs: 695 Elo per point of expected score, counting only mistakes the opponent cashed in. Trends: Welch z-test against Prior 9 mo.

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Analysis by [Stockfish](https://stockfishchess.org/), the free open-source chess engine. Chess Goat is not affiliated with chess.com, or with any player, coach, author or channel quoted or linked in this report.
