The Teacher

Set up any board on your phone and ask for the play. The Closer answers instantly, in your browser — then the exact endgame solve, win-rate simulations, and the named laws in force are fetched live to check its instinct against perfect play.

Research frozen — results as of July 2, 2026

Your board

Tap a cell to cycle its marks: empty → / (1) → X (2) → ⊕ (3, closed) → empty. The left column is you, the right is your opponent.

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Bull
Who is throwing
Darts left in the turn
Skill settings (marks per round)

The call

Set up a board on the left and tap Advise.