Finally understand why
this move is the best
An AI coach that doesn't just tell you what to play, but explains why — in your language, at your level.
No credit card required • Start in 30 seconds
AI: The knight on f3 controls the center and prepares kingside castling. This natural development puts pressure on e5 while freeing up your king...
Chess engines give you moves.
Not answers.
Stockfish says "Nf3 +0.8"
but why this move?
Databases show statistics
but what do they mean?
YouTube videos explain full games
but what about your specific position?
You keep making the same mistakes
because nobody explains the trap
“I knew my move was bad. But I didn't understand why the engine's move was better. It's frustrating.
Multiple intelligence
at your service
We combine 4 sources of intelligence to give you not only the best move, but most importantly, understanding.
Stockfish
~30msObjective analysis
- Precise evaluation in centipawns
- Best lines calculated in depth
- Critical moment detection
Lichess Database
Millions of gamesCollective wisdom
- Statistics from millions of games
- Real win rates per move
- Move popularity by Elo level
Maia
800-2800 EloHuman psychology
- Predicts what a human would actually play
- Analysis by skill level (800-2800 Elo)
- Identifies anti-human traps
Multi-LLM AI
GPT-5 | Claude | GeminiBest-in-class AI Models
- Natural language explanations via LLM
- Multiple AI models for best results
- Comparison with your alternatives
3 steps to understand
Import
Paste a PGN, enter a FEN, or import directly from Lichess/Chess.com.
Analyze
Stockfish analysis and statistics appear instantly.
Understand
Click "Explain" to get a natural language explanation.
All the features to improve
Powerful tools designed to help you understand and improve your game.
Position Analysis
Understand any position in seconds
Import a game or position. Instantly get Stockfish evaluation, database statistics, and most importantly: a clear explanation of what's happening.
- PGN import (file or copy-paste)
- FEN import for specific positions
- Direct import from Lichess and Chess.com
- Move-by-move navigation with analysis
- "What if?" mode to test alternatives
GPT-5 Explanations
LLM Powered | Quick ~2-5s | Deep ~10-15sMore than a move: a lesson
Understand the why behind each move. Our GPT-5 powered AI analyzes the position and explains the tactical and strategic concepts at play.
- Why this move is objectively the best
- Tactical pattern explanations
- Why a tempting move is actually losing
- Counter-intuitive move analysis
- Evaluation of your own ideas
AI Voice Coach
Talk to your coach. It answers.
A real-time voice coach powered by advanced LLM technology. Ask your questions aloud, get instant answers about the current position.
- Ultra-low latency (~100ms)
- Automatic position context
- Multi-language (responds in your language)
- Natural, fluid conversation
“Why can't I take the pawn on e5?”
“Taking on e5 seems tempting because you win a pawn, but after Qh4+ check, you lose the right to castle and your king stays exposed in the center. The engine evaluates this position at -2.3 for you.”
Puzzle Mode
50+ tactical themes to improve
Puzzles organized by tactical theme. Each incorrect puzzle explains why — not just the solution, but the reasoning.
- Puzzle of the day
- Selection by theme or random
- Progressive hint system
- Real-time feedback
- Progress stats by theme
Play vs AI
Play. Analyze. Understand.
Face an AI with adjustable difficulty. At any moment, ask for an explanation of the position. Understand your mistakes in real-time.
- 20 difficulty levels
- Analysis available during the game
- Auto-save
- Resume after closing browser
Interactive Interface
Explanations come alive on the board
Explanations aren't dead text. Every mentioned move is clickable, every square is hoverable, every variation is playable.
- Clickable move badges
- Hoverable piece badges
- Playable lines move by move
- Visual arrows for threats
Understand chess in your language
For all levels
Whether you're a beginner or an experienced player, our AI adapts to your level.
Beginner player
“I don't understand why I'm losing”
Simple, accessible explanations. Common mistake detection. Progressive puzzles by difficulty.
Intermediate player
“I want to reach the next level”
In-depth analysis of critical positions. Understanding of strategic concepts. Tactical pattern identification.
Advanced player
“I want to understand the subtleties”
Counter-intuitive move explanations. Psychological trap analysis. Human vs machine comparison.
Coaches
“I need an assistant to explain”
Multi-language support for international students. Level-adapted explanations. Educational content generation.
What makes us unique
| WhyThisMove | Others |
|---|---|
Explains why | Just says what to play |
Combines 4 intelligence sources | Single source (engine) |
Real-time voice coach | No voice |
Detects anti-human traps | Ignores psychology |
11 native languages | Mainly English |
Interactive interface | Static text |
Start free
Progress without limits
Stockfish, Lichess, and Maia analyses are always free and unlimited. Only AI explanations use credits.
Free
Perfect for discovering and improving at your pace
- 2,000 AI explanations per month
- Unlimited Stockfish analysis
- Unlimited Lichess statistics
- Unlimited Maia predictions
- All game modes
- All 11 languages
- Unlimited puzzles
Premium
For serious players who want to improve fast
- Unlimited AI explanations
- Priority deep analysis
- Extended voice coach
- Unlimited Stockfish analysis
- Unlimited Lichess statistics
- Unlimited Maia predictions
- Priority support
No credit card required for free plan
What's always free
Stockfish
Unlimited
Lichess Stats
Unlimited
Maia
Unlimited
Puzzles
Unlimited
Frequently asked questions
Everything you need to know to get started
Have more questions? Contact us