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Didn't see that coming?
You were guessing, not calculating.

Puzzles where the board freezes. Visualize the moves and find the win.

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Built for your phone.

Nothing is cut down for the small screen. Add it to your home screen and it opens like an app.

Openings lost 7 games.
Tactics lost 60.

Out of 100. Guess which one you've been studying.

Tacticlost material or walked into mateOpeninglost by move 15, no big mistakeGrindlost slowly, no big mistakeOtherone big mistake, not a tacticTimelost on the clock63,109 Lichess rapid games checked by Stockfish.

Our method

  1. 1

    Watch the moves

    They land as arrows, one by one.

  2. 2

    Hold the position

    It changes only in your head.

  3. 3

    Find the win

    From the visualized position.

How it beats regular puzzles

  • You get by thinking one move at a time
  • The puzzle rating climbs but the games don't change
  • You see the blunder one move too late

Peekchess

  • You think strategically in advance
  • Your game rating goes up, not just your puzzle rating
  • You see threats coming and punish mistakes

Every solution explained

Chess.com and Lichess show you the moves and stop. You get a tick, and no idea what made the line work.

Peek AI writes the line out move by move while you wait, and every move it names is checked against Stockfish and Maia first. An answer that fails the check never reaches you.

Moves checked by Stockfish
The report's blunder patterns: tactics you missed and threats you allowed, counted across your gamesThe report's blunder patterns on a phone

Puzzles picked to hit your weaknesses

  1. 1

    Connect your account

    We read this year's games, up to 250.

  2. 2

    We find your blunders

    An engine checks every move.

  3. 3

    Your training aims there

    Aimed at what you keep missing.

Every puzzle you've solved was from your side of the board.
Never once from theirs.

Threat mode asks the other question: not what you can win, but what they're about to do to you.

Chess calculation in 4 steps

  1. The app asking "Is there a tactic here?" with Yes and No under the board

    1Critical positions

    Is there a tactic here, or nothing at all?

  2. The same position with three candidate moves listed, each marked capture and drawn as an arrow, and a Check button under them

    2Forcing moves

    Checks, captures and threats, not everything.

  3. The same position again, the three candidates marked green, with the line "One of these is the move. Play it."

    3Calculate them

    Play each one out. The pieces don't move.

  4. The same position once the line is played out, with an evaluation bar the player has set, marked right against the engine's number

    4Evaluation

    Your line ends here. Say how the position stands.

No more computer lines you don't get

Every reply here is checked by Maia 3, a neural network trained on millions of human games. Puzzle lines, by contrast, are defended by an engine, so they hang on moves nobody at your level would find.

  • PeekchessRxf798% of players around your rating
  • Bxd4+2% of players around your rating
A lesson puzzle with its reason above the board: the pattern this one drills, and how far into the ten you areA whole lesson screen on a phone: a 1904 puzzle, the board three moves behind with those moves drawn as numbered arrows, and the move list waiting for the answer

Lessons built for your player profile

  1. 1

    Five puzzles from your mistakes

    The phase you're worst in, the patterns you walk into.

  2. 2

    Five puzzles from your openings

    The ones you actually play, from your side.

  3. 3

    10 minutes a day

    Ten puzzles, one sitting, wherever you are.

The most filterable puzzles on the internet

  • Tactics or threats
  • 2 to 10 moves ahead
  • Difficulty
  • Patterns
  • Your Openings
  • Your weaknesses
The training filters: threats or tactics, moves ahead, difficulty, and a theme picked from openingsThe puzzle filters on a phone: tactics or threats, depth, difficulty, rated, and a theme picked from their openings with the side they play it from
The two Drills pages: critical positions, forcing moves, evaluation and calculation process under Thinking, then keeping track, targets, coordinates, square colours and knight checks under VisualizationThe same two Drills pages on a phone

9 drills beside the lesson

The lesson works on your mistakes. The drills work on what causes them. All nine open from day one.

Built by a coach, for players like you

14 years of coaching players out of exactly these mistakes.

Daniel Kozusek

Daniel Kozusek

FIDE Master · Chess coach

4× Welsh champion. Welsh team at the 2024 Chess Olympiad.

200+students coached
60,000+rating points gained
14years coaching

Find out how far ahead you can really see

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Takes about a minute. Your report is free.