Question 1

Where can I check if my chess opponent was using a bot?

Accepted Answer

Right here. Paste the PGN of any chess game and the fair-play analyzer runs engine analysis on each eligible move. You get a 0-to-100 formula score for both sides, with engine agreement rates, centipawn loss, consistency, and the highest-scoring moves. It runs entirely in your browser - no upload needed.

Question 2

How do I copy my game from chess.com to check for cheating?

Accepted Answer

On chess.com, open the game you want to check, click the share or download button, and copy the PGN text. Come here, paste it into the input box, and hit Run Analysis. The analyzer reads standard PGN from chess.com, Lichess, or any platform. It returns formula scores, the highest-scoring move signals, and an interactive board review.

Question 3

How does a chess bot detector actually work?

Accepted Answer

The analyzer replays every move of the game and compares each decision against a strong chess engine running at depth 14 or higher. It measures centipawn loss, engine-choice agreement, consistency, and performance in critical positions. These signals feed a weighted formula that produces an engine-likeness score; the formula is not a validated cheating classifier.

Question 4

What does the formula score mean in this chess review tool?

Accepted Answer

The score is a 0-to-100 engine-likeness index produced by this tool’s weighting formula. Its bands are review labels, not validated probabilities or proof of cheating. Until a public benchmark is published, use the score to compare the displayed move-level signals and inspect the game in context.

Question 5

Can I detect if someone used a chess engine during an online game?

Accepted Answer

You can inspect how closely a game matched the engine-related signals in this formula. It checks engine move agreement, accuracy consistency, performance in critical positions, and engine-match streaks. A high formula score does not prove cheating and the current thresholds are not validated classifications.

Question 6

What is centipawn loss and how does it help detect cheating in chess?

Accepted Answer

Centipawn loss estimates how much evaluation a move gave up compared with the engine’s preferred move, in hundredths of a pawn. This analyzer combines it with engine-choice agreement and critical-position signals. There is no universal centipawn-loss threshold that proves cheating; opening familiarity, position type, rating, and game length all affect the result.

Question 7

Does this chess fair-play tool work with Lichess games?

Accepted Answer

Yes. The analyzer accepts standard PGN notation from any chess platform that exports it. If clock tags are present, it displays a separate time-versus-criticality diagnostic. That diagnostic has not been validated as a human/bot classification and does not change the formula score.

Question 8

How accurate is online chess cheating detection?

Accepted Answer

A single game cannot prove intent. A higher score means the moves matched more of the engine-likeness signals used by this tool’s formula. The current thresholds have not yet been validated in a public benchmark. Review the displayed metrics and positions yourself, and never treat the score as an automatic verdict.

Question 9

Can I review the highest-scoring moves on a chess board?

Accepted Answer

Yes. After the analysis completes, open the board review panel to step through the game move by move. Colored arrows distinguish lower, medium, and higher formula contributions; they are not cheating labels. Blunders by the opponent show the engine best move as a dashed arrow. You can jump to the highest-scoring moves or blunders with one click.

Question 10

What chess cheating patterns does the bot detector look for?

Accepted Answer

The formula combines low centipawn loss, engine-choice agreement, engine-match streaks, accuracy consistency, and critical-position agreement. Clock data appears only in a separate time-versus-criticality diagnostic; it does not change the formula score. None of these measurements proves cheating.

Bot Detector (PGN)