# Rules

## Overview

Thirteen (or Tien Len) is a 4-player card game.

## Card Ranks

Cards are ranked from 2 (highest) to 3 (lowest): `2 A K Q J 10 9 8 7 6 5 4 3`. Additionally, suits are ranked from high to low: `h d c s`. Therefore the `2h` is the strongest card, followed by `2d`, etc.

## Card Combinations

Thirteen is played with the following card combinations:

• single - Just what it sounds like, a single card, like `3s`.
• set of `n` - Set of `n` cards. `3s 3c` would be a set of 2, `4s 4c 4d` a set of 3, and so on. They do not have to be the same color suits.
• run of `n` - Run of `n` cards (at least 2). `3s 4c 5d` is a run of 3.
• run of `n` (flush) - Run of `n` cards with the same suit, such as `3s 4s 5s`.
• `m` consecutive sets of `n` - A combination of a run of `m` (at least 2) and sets of `n` (at least 2). `3s 3c 4s 4c 5s 5c` is 3 consecutive sets of 2.

## Game Play

The player who has the `3s` starts and can play any valid combination. Players continue counter-clockwise playing the same combination, but with higher end cards. For example, the pair `3s 3d` can be beaten with `3c 3h` or `4s 4c`. The same applies to runs: `3s 4c 5d` can be beaten by `3c 4s 5h`. Only the highest last card matters. Players have the option of passing when it is their turn. Once 3 players in a row pass, the winner gets to start with a new combination of his/her choice. The first player who plays all 13 of his/her cards wins and the game continues until one loser remains.

### Bombs

While 2s are the strongest cards, certain hands called bombs can beat them:

• 3+ consecutive sets of 2 or a set of 4 beats any single 2.
• 4+ consecutive sets of 2 beats any set of 2 2s.
• 5+ consecutive sets of 2 beats any set of 3 2s.
• Nothing beats a set of 4 2s.

If a 2 or set of 2s is in play, a player can play a bomb and knock the person who played the 2 or set of 2s out. Play resumes with the new card combination. Bombs can be played even if a player had previously passed.

## Notes on Variations

• A card combination including the `3s` must be played to start. Some variations allow any 3 consecutive sets of 2 to be played, but that is not the case here.
• There is no flush locking/unlocking for runs of `n`. Only if a run of `n` is initially suited when played, all runs following it must be suited. If a run of `n` is initially unsuited, any suited runs that follow it do not require even higher runs to be suited.
• There is no such thing as instant win unless you have a run of 13 starting with the `3s` in which you can play it for an instant win.
• The winner of the previous round does not start; the player with the `3s` does.
• There is no card trading or exchanging at all.