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Games

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Full rules
Players
Difficulty
Game options
Who starts?
Hints Hints let the computer suggest a move. Undo is always available; using it marks the game as assisted for challenge records.

RULES ▾
MOVE HISTORY replay

Full rules

Remove one or more tokens from exactly one pile. You may take a whole pile. In normal play, whoever takes the last token wins. In misère, whoever takes the last token loses. Same board, different decisions. Undo is always available.

Players
Difficulty Perfect never gives up a forced win. From a position that is already lost for it, no engine can force a win — it still plays a legal move.
Game options
Rule

Who starts?
Hints Hints let the computer suggest a move. Undo is always available; using it marks the game as assisted for challenge records.
Board workshop List · Build · Generate · Presets
One number per pile. Commas, spaces or new lines all work — e.g. 1, 3, 5, 7. Applying updates the board; Build then edits the same piles.
PILESHEIGHT to
PATTERN
NEXT PLAYER
SEED

Nim

Choose a token to remove it and everything above it. Click a pile's number to type an exact amount.
RULES ▾
MOVE HISTORY replay
Replay only looks at earlier positions. Use undo to actually take a move back.

Full rules

Select a tile: it and every remaining tile at or below it and at or to its left are removed. The poisoned tile is the upper-right corner. Whoever takes it loses immediately. There are no draws. Undo is always available.

Players
Difficulty
Game options
Who starts?
Hints Hints let the computer suggest a move. Undo is always available; using it marks the game as assisted for challenge records.
Board size
×

Presets read rows × columns: 3 × 8 is three rows, eight columns.

Shape workshop Bites · Row lengths · Random
A fresh rectangle. Choose a size above.
Click tiles in the preview to take practice bites. The poison stays.
ROW LENGTHS
top to bottom, nonincreasing, right-aligned.
BITESTARGET LEFTSEED

Chomp

RULES ▾
MOVE HISTORY replay

Full rules
Players
Difficulty
Game options
Who starts?
Hints Hints let the computer suggest a move. Undo is always available; using it marks the game as assisted.

Full rules
Difficulty
Lives per level
Levels

Full rules
Difficulty
Levels

Full rules

Full rules
Players

Full rules
Players

Two. Each on your own phone or computer, or taking turns on one device. No time limit unless you want one.

Full rules

Full rules

RULES ▾