Chess Post-Mortem: How to Review Your Games Properly
A chess post-mortem is the review of a finished game to understand what both players were trying to do, where the game changed direction, and which mistakes mattered most. The best post-mortems do not begin with an engine. They begin with your own thoughts, plans, fears, missed ideas, and turning points.
Quick answer: In chess, a post-mortem usually means going over the game after it ends, often with your opponent, coach, friend, or your own notes, to understand the real story of the game before checking computer moves.
Two quick Morphy examples of what a good post-mortem notices
A useful post-mortem is not just “where was the blunder?” It also asks why a position became easier to play for one side. These two Morphy examples show the sort of turning points that are easy to miss during the game and much easier to understand afterwards.
Example 1: ...Bc5 looked active, but allowed d4 with tempo
In a good post-mortem, you ask whether a developing move also created a target. Here Black’s bishop looks active, but White can strike the centre with d4 and gain time by attacking the bishop.
Example 2: queenside castling became a real practical risk
A strong post-mortem asks whether castling actually solved king safety or only moved the king into the line of fire. Here Black has castled long into a position where White’s attacking chances are already growing.
What to take from those examples: The best lesson is often not “move 14 was bad.” The better lesson is “I developed into a target” or “I castled into an attack without checking the pawn structure and piece activity.”
Replay lab: model games to study like a real post-mortem
Use these exact Morphy games as a study lab. Watch the full game first. Then ask yourself where the evaluation really started to drift, what plans each side had, and what one practical lesson you would carry into your own games.
Study tip: first watch the game once without trying to “beat” every move. Then replay it a second time and pause at the moment where you think one side’s plan became easier to understand.
The best post-mortem routine for real improvement
Most players either do too little or do the wrong thing in the wrong order. The goal is not to collect engine moves. The goal is to understand why your practical decisions failed or succeeded.
Step 1: capture the human story first
Write down what you were thinking while the memory is still fresh. Record where you felt confident, confused, rushed, scared, or tempted by a sacrifice.
- What was my plan here?
- What move did I seriously consider besides the one I played?
- Where did I start feeling uncomfortable?
Step 2: find the first real turning point
Do not only look for the final blunder. A stronger post-mortem finds the first moment where the position became easier to play for your opponent or harder to play for you.
- Did development create a target?
- Did king safety change?
- Did I drift into a worse structure or plan?
Step 3: classify the mistake
Put the error into a useful bucket so your next week of study improves the right skill.
- Tactical blindness
- Strategic misunderstanding
- Time trouble or panic
- Bad practical decision
Step 4: use the engine late, not first
The engine is excellent for checking your conclusions, but poor as a replacement for thinking. Use it after you have identified candidate moves, plans, and your own explanation of the game.
- What did I miss?
- Why is the engine move stronger?
- What pattern should I remember next time?
What a strong post-mortem should produce
- One clear lesson from the opening.
- One clear lesson from the middlegame plan or tactical moment.
- One practical habit to test in your next games.
That is enough. Ten vague lessons are weaker than one lesson you will actually remember over the board.
Mistakes worth naming properly
Vague conclusions such as “I played badly” do not help much. Better labels make better training plans.
Tactical blindness
You missed a direct tactic, loose piece, mating idea, or forcing line. The fix is not only more puzzles. It is also a better habit of checking forcing moves before you play.
Conceptual error
You misunderstood the position. You traded the wrong piece, opened the wrong file, castled into danger, or played without a plan.
Psychological error
You saw the right idea but did not trust it, or you rushed because you were tilted, overconfident, or afraid of a ghost threat.
Time-management error
You spent too long on a non-critical move, then played the real crisis on autopilot. A good post-mortem tracks where your clock decisions went wrong.
One-lesson rule: after every serious game, write down one sentence you want to carry into the next game. A post-mortem becomes much more powerful when it ends with a single practical instruction you can actually remember.
Common questions about chess post-mortems
Definition and basics
What is a post-mortem in chess?
A post-mortem in chess is the review of a finished game so the players can understand plans, mistakes, missed chances, and turning points.
What does post-mortem mean in chess?
Post-mortem in chess means analysing the game after it is over, usually by replaying moves and discussing what both sides were trying to do.
What is the difference between postmortem and post-mortem in chess?
In chess, postmortem and post-mortem mean the same thing, and the hyphen is just a spelling variation rather than a different concept.
Is a chess post-mortem the same as engine analysis?
A chess post-mortem is not the same as engine analysis because a real post-mortem starts with human thoughts, plans, and explanations before computer checking.
How to do it properly
Should beginners analyse chess games without an engine first?
Beginners should analyse chess games without an engine first because self-analysis reveals what they actually saw, feared, calculated, and misunderstood during the game.
How long should a chess post-mortem take?
A chess post-mortem can take anything from five minutes to an hour or more, depending on the time control, the complexity of the game, and how deeply you want to study the critical moments.
What should you write down right after the game?
You should write down your plan, the moves you seriously considered, the moment you felt uncomfortable, and any position where you spent a lot of time or felt confused.
Should you analyse wins or only losses?
You should analyse both wins and losses because winning games often hide bad habits that only become obvious when you review how the position was actually handled.
What should you look for first in a post-mortem?
You should first look for the earliest meaningful turning point, not just the final blunder, because that is often where the position started becoming easier for your opponent to play.
Misconceptions and practical issues
Do grandmasters still do post-mortems?
Grandmasters still do post-mortems because discussing a game with the opponent or a strong player often reveals practical ideas and hidden resources that are easy to miss during play.
Can you do a post-mortem for online chess?
You can do a post-mortem for online chess by replaying the game yourself, saving critical positions, and discussing the game with a friend, coach, or training partner even if the game was not over the board.
What if I cannot see my mistakes without an engine?
If you cannot see your mistakes without an engine, you should still try to explain the position in words first, because the habit of naming plans and candidate moves is exactly what the post-mortem is supposed to train.
Train the skill behind the post-mortem: the whole point is not only to know the move later, but to understand why you missed it during the game. That is why calculation, evaluation, and self-explanation matter so much.