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Both calculators run independently — change the inputs on either side to compare results.

Chess Game Analysis Calculator

Calculate your chess game accuracy score based on blunders, mistakes, and inaccuracies relative to total moves played. Use it after any game to benchmark your performance and track improvement over time.

Total Moves Played (moves)

Number of Blunders (blunders)

Number of Mistakes (mistakes)

Number of Inaccuracies (inaccuracies)

Fill in the required fields to see your result.

Chess

Chess Blunder Impact Calculator

Estimates the weekly performance cost of blunders and mistakes in chess based on error frequency, severity, games played, and time control. Use it to identify how much your errors are truly hurting your results.

Blunders per Game (blunders)

Mistakes per Game (mistakes)

Games per Week (games)

Average Blunder Cost

Time Control Factor

Fill in the required fields to see your result.

Key differences

	Chess Game Analysis Calculator	Chess Blunder Impact Calculator
Category	Chess	Chess
Inputs required	4	5
Result	Game Accuracy (%)	Weekly Rating Loss (Elo points)
What it does	Calculate your chess game accuracy score based on blunders, mistakes, and inaccuracies relative to total moves played. Use it after any game to benchmark your performance and track improvement over time.	Estimates the weekly performance cost of blunders and mistakes in chess based on error frequency, severity, games played, and time control. Use it to identify how much your errors are truly hurting your results.