Self-analysis

Self-analysis means reviewing your own game before accepting an explanation from another person or a machine. Its main question is not only which move was best, but how each important decision was made: what you noticed, calculated, rejected, or misunderstood.

A useful order

1. Replay the game without assistance and mark moments when you hesitated, used much time, changed plans, or were surprised by the opponent's reply.
2. Record the candidate moves, meaning the plausible options, that you considered and the outcome you expected. If the original thought is unclear, separate genuine memory from a conclusion added afterward.
3. Find the first point where the position or decision process began to deteriorate, not only the final visible error. Calculate alternatives and write a provisional conclusion.
4. Then compare your conclusions with an annotated game, a game accompanied by explanatory comments, a coach, or an engine evaluation. A chess engine is software that calculates moves and estimates positions. It can check conclusions, but it does not automatically explain your thinking process.

The most useful output is a trainable cause. Examples include missing the opponent's threat, stopping calculation too early, not knowing the plan associated with the pawn arrangement, or managing time poorly. That cause can become a preparation task, a tactics puzzle, a position with a concrete solution that must be calculated, or a training game, played with a learning objective.

Wins and draws also deserve analysis. A favorable result can hide weak decisions that the opponent failed to punish. Reviewing only losses confuses the score with the quality of the process.