WhyThisMoveBeta

Why WhyThisMove

Stop memorizing moves. Start understanding chess.

An engine tells you Bb5 is worth +0.22. The coach tells you why, in words, on your own games.

Analyze my last game

Opens the analysis board: click “Import a game” (Lichess, Chess.com or PGN).

Works withLichess · Chess.com

Powered byStockfish · Maia · Language models

One position, two answers

What an engine gives you

  1. 1. Bb5+0.22
  2. 2. d4+0.08

Correct, and silent about why.

What the coach adds

Bb5 is more precise because it maintains maximum tension. By playing d4, you allow the sequence exd4 Nxd4, which leads to a very open game where Black equalizes relatively easily after developing the Kingside with Nf6.

Same position, before White's 3rd move. Both answers are real. Excerpt of the coach's answer to the same move.
6.4 billion
Lichess games (2013–2025) behind the move statistics
16,800+
opening mistakes, each seen in at least 20 games
6
languages for the app and the coach

01THE PROBLEM

Sound familiar?

Classic tools give you a move. You need a plan.

01

Stockfish says play this

Nf3 +0.8

But why is it good?

02

You memorize openings

1.e4 e5 2.Nf3 Nc6 3.Bb5

But forget them mid-game

03

Videos analyze GM games

GM analysis videos

But not YOUR positions

04

Same mistakes, again

-1.5 blunder detected

Because no one explains why

02THE SOLUTION

Play with ideas, not memorized lines

WhyThisMove combines engines, databases, and AI to turn every position into a clear decision.

Your personal AI chess coachOpen the full screenshot
01

Your personal AI chess coach

Every move explained in plain language. Understand the main idea, what it accomplishes, and what to avoid.

  • Clear explanations for every position
  • Progressive hints: Observe, Direction, Execute
  • Arrows drawn on the board
  • Adjustable difficulty levels
Import your games in secondsOpen the full screenshot
02

Import your games in seconds

Connect your Lichess or Chess.com account. Your recent games are ready to analyze in one click.

  • Direct import from Lichess & Chess.com
  • PGN and FEN support
  • Review the important moments in your game
  • Full game history with results
Learn from {mistakes} opening mistakesOpen the full screenshot
03

Learn from 16,800+ opening mistakes

The mistakes players really make in the opening, each one seen in at least 20 games. See why they fail and find the move that punishes them.

  • Each one seen in at least 20 real games
  • The refutation to find, as a puzzle
  • Evaluation before and after the mistake
  • Hints when you're stuck
Understand openings, don't just memorizeOpen the full screenshot
04

Understand openings, don't just memorize

Explore any opening move by move: the idea of each candidate move, its evaluation, its frequency when the data exists, and a coach to answer your questions.

  • Candidate moves with their idea
  • Stockfish evaluation for each move
  • The most likely replies at your level
  • Questions to the coach at any moment

Turn your latest game into a training plan.

Analyze one of your games, understand your key mistakes, and leave with a concrete improvement plan.

Analyze my last gameFree to start · No credit card required