WhyThisMove
Sample analysis

WhyThisMove explains your chess mistakes like a real coach.

Import a Lichess or Chess.com game. See the best move, the human idea, the threat you missed, and how to avoid the same mistake next time.

Public beta

Choose Plus, Pro, or Max. AI Coach, deep analysis, and Battle use credits.

  • Plans start at $5/month
  • Credit usage is shown before AI actions
83M+games analyzed
11,000+blunders catalogued
5+AI perspectives combined
View plans →Explore Kids mode
83M+games analyzed
11,000+blunders catalogued
5+AI perspectives combined

Create an account and start with 100 free credits.

Works withLichessChess.com
Powered byStockfishLichess DBMaiaMulti-LLM
83M+games analyzed
11,000+blunders catalogued
5+AI perspectives combined
THE PROBLEM

Sound familiar?

We combine the world's best chess AI with cutting-edge language models.

01Position

Stockfish says play this

Nf3 +0.8

But why is it good?

02Move

You memorize openings

Stockfish

Objective analysis

  • Precise evaluation in centipawns
  • Best lines calculated in depth
03Reason

4 AI engines. One answer.

Lichess DB

Collective wisdom

  • Statistics from millions of games
  • Real win rates per move
THE PROBLEM

Sound familiar?

Traditional chess tools give you answers without understanding.

Nf3 +0.8Because no one explains WHY
01

Stockfish says play this

Nf3 +0.8

→ But why is it good?

02

You memorize openings

1.e4 e5 2.Nf3 Nc6...

→ But forget them mid-game

03

Videos analyze GM games

Magnus vs Hikaru

→ But not YOUR positions

04

Same mistakes, again

-1.5 blunder detected

→ Because no one explains WHY

THE SOLUTION

4 AI engines. One answer.

We combine the world's best chess AI with cutting-edge language models.

StockfishLichess DBMaiaMulti-LLM

Stockfish

~30ms

Objective analysis

  • Precise evaluation in centipawns
  • Best lines calculated in depth
  • Critical moment detection

Lichess DB

83M games

Collective wisdom

  • Statistics from millions of games
  • Real win rates per move
  • Move popularity by ELO

Maia

800-2800 ELO

Human psychology

  • Predicts human moves
  • Analysis by skill level
  • Identifies anti-human traps

Multi-LLM

GPT-5 • Claude • Gemini

Natural explanations

  • Plain language explanations
  • Multiple AI models available
  • Compare your alternatives
FEATURES

Everything you need to finally get it

AI Coach visual

AI Coach

Ask any question about your position and get clear explanations. The coach shows candidate moves with arrows and explains the ideas behind each variation.

  • Natural language explanations
  • Visual arrows on the board
  • Progressive hints system
  • Works in 11 languages
REAL TRAINING MOMENTS

The kind of patterns the coach helps you fix

You were not losing the Sicilian opening. You were missing the same ...d5 break idea after move 8.

Sicilian structureRecurring opening pattern

Your natural developing move failed tactically because it removed the defender of e4.

Tactical habitPinned knight and loose center

The engine line matters less than the rule: solve the opponent threat before starting your own attack.

Review takeawayOne sentence lesson
Fun mode

Challenge LLMs for fun, then train seriously with your own games.

Battle is the playful side entrance: test how ChatGPT, Claude, and Gemini think in chess. The serious coach stays focused on explaining your games.

  • Separate from serious analysis
  • Uses credits for AI moves
  • New accounts start with 100 free credits
Open Fun ModeView sample analysis

Your next game could be your breakthrough.

Start free with 100 credits and review one real mistake from your own games.

Get 100 free credits →Create an account and start with 100 free credits.
View plansExplore Kids mode