Six Stockfish difficulty presets with clear training themes. Pick an assist level — Challenge (3 crowns), Friendly (2), or Assisted (1) — then beat the bot to fill your crown row. Hints draw arrows on the board; the coach panel grades every move.
Rating labels are provisional practice targets (benchmark games = 0), not guaranteed Chess.com, Lichess, or FIDE Elo. Engine behavior varies with the position and device.
First session downloads Stockfish (~7 MB) — may take 10–20 seconds. If the engine fails, try a lesson or drill instead while it retries.
Just learning the rules.
The lowest Stockfish preset for practising development, centre control, and king safety without an exact rating promise.
Trains: Basic principles — develop, centre, king safety.
Recommended if: You're new and want to practise fundamentals.
Local club player.
A lower-difficulty practice target for spotting loose pieces and one-move tactics. Mistake frequency varies by position.
Trains: Stop hanging pieces — club-level tactics discipline.
Recommended if: You blunder a piece most games.
A sharper tactical practice preset.
Use this preset to practise checking forcing moves and protecting loose pieces. It is not limited to an exact three-ply search.
Trains: Tactics discipline — punish loose pieces.
Recommended if: You miss simple tactics in games.
Attack first, ask questions later.
A sharp-position training theme at a higher Stockfish preset. The name is a scenario, not a claim that every move imitates a human attacker.
Trains: Defend attacks — survive wild kingside pushes.
Recommended if: You struggle against attacking players.
Boring? Yes. Hard to crack? Also yes.
A defensive training theme for creating plans against resilient engine play. It does not guarantee a fixed trade rate.
Trains: Avoid passive trades — keep pieces and create play.
Recommended if: You trade too much and end up worse.
The highest Stockfish preset.
Skill 20 at the deepest practice-bot setting. The 2600 label is a provisional difficulty target, not a certified playing rating.
Trains: Calculation punishment — no sloppy moves survive.
Recommended if: You want a serious test at near-master strength.