See the whole line
before you move.
Peekchess trains calculation: thinking ahead without moving the pieces, as a game asks.
How a puzzle works
- 1
Watch the moves
They land as arrows, one by one.
- 2
Hold the position
It changes only in your head.
- 3
Find the win
From the visualized position.
The board freezes
On most puzzle sites the pieces move as you solve. You can go one move at a time.
A game doesn't let you. The board stays as it is until you move.
So in Peekchess the pieces stay put. The moves land as arrows, and you calculate the line in your head over the board you can see.
A depth that climbs
Every puzzle shows how many moves ahead you are working. You start at a depth you can already see.
As you solve, the number climbs. You can also set it yourself in the puzzle filters.
Lessons in your openings
A lesson is a set of puzzles from the openings you play, at your level.
Connect Chess.com or Lichess, and the lesson knows which openings those are.
A free report on your games
Most players study what they think is wrong. The report shows what actually is.
It reads your Chess.com or Lichess games and shows where you blunder: the tactics you missed, the threats you allowed, and the phase you lose most in.
Peek AI explains it
Solved it or missed it, open the analysis board and press Explain.
Peek AI explains the position in plain words: a sentence on each move, and the other replies the defender had.
Every move it names is checked by Stockfish first.
Stop losing games to moves you didn’t see.
60 of every 100 lost games are a missed tactic.Free to start, no card needed.
Start free