BROWSER-BASED CHESS TOOLS / HUMAN-LED STUDY
Chess Tools & Calculators
Explore legal moves, understand Elo expectations, and build a better AI study prompt. No signup and no game uploads.
Chess analysis board
Play legal moves, load FEN positions, undo, flip, and continue to an independent engine interface.
Elo rating calculator
Estimate one-game expected score and rating change under the familiar logistic formula.
AI chess prompt builder
Create a structured learning prompt locally. Choose a level, topic, and practice goal.
Stockfish analysis guide
Learn what engine scores mean and how to turn checked variations into useful lessons.
Clear boundaries, useful tools
The board checks legal moves; it does not evaluate positions. The calculator is an educational estimate, not an official rating calculation. The prompt builder writes a template; it does not call an AI service. Use assistance only where the rules allow it.