Tools

AI + Chess utilities to help you analyze and create.

Elo Gain/Loss Calculator

Estimate rating change from K × (S − E).

Stockfish Output Explainer

Explain depth, eval, mate, and PV.

Chess960 Castling Helper

Final squares + checklist (no confusion).

Chess Board Editor

Set up any position by dragging pieces, then send it to analysis.

Chess Diagram Maker

FEN→PNG and PGN→WebM for pro diagrams.

Free Online PGN Analysis

Analyze chess PGN files online with visualization and move exploration.

Chess GIF Maker

Convert chess PGN games to an animated GIF or WebM for social media.

Canadian Ratings Estimator

Estimate CFC rating change from event results.

Chess Clock

Two-player clock with presets and increments.

PGN Cleaner

Normalize, strip comments, and tidy PGN files.

FEN Validator

Validate FEN and inspect fields & piece counts.

Opening Explorer

Browse openings and learn common continuations.

Elo Gain/Loss Calculator

Expected score + K-factor → estimated rating change.

Stockfish Output Explainer

Explain depth, eval, mate, and PV in plain English.

Chess960 Castling Helper

Final squares + rules + checklist for castling.

Chess960 Generator

Generate Fischer Random start positions.

More tools are coming soon. Click into each tool for details.

Start With the Right Chess Tool

Choose a workflow for analysis, diagrams, videos, or engine output.

Import PGN or FEN and run Stockfish in your browser.

Understand the position format used by chess tools.

Decode depth, evaluation, mate, and principal variation.