The rules

1. A double-six set. Each player is dealt nine tiles at two players, seven at three, or five at four, and the rest is the boneyard.
2. Play a tile so that one of its halves matches an open end of the layout. Any tile may be led.
3. A double is laid across the line, and both of its halves count as one end until something is played onto it.
4. Score whenever the open ends of the layout add up to a multiple of five, and score that total. Ends totalling fifteen scores fifteen.
5. A player who cannot go must draw until they can, or until the boneyard is empty. A player holding a playable tile may not draw at all.
6. Going out, by playing your last tile, scores the pips left in everybody else's hands.
7. If nobody can play, the hand is blocked: the lightest hand wins and scores as if it had gone out.
8. The game is played to 61, with every score divided by five, which is the version scored on a cribbage board.

Drawing is done for you, because a turn with exactly one possible outcome is not a decision and would otherwise cost you a day of your deadline. Muggins is not played: scores are taken automatically and cannot be stolen.