Coda is a code-breaking board game for two to four players, invented by Eiji Wakasugi. The objective is to guess the code of other players while preventing the discovery of your own code.
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Gameplay
The game is played using 24 tiles (12 blacks and 12 whites) numbered from 0 to 11 on one side. Initially all the tiles are laid face down on the table. Each player then chooses 4 tiles (3 tiles if there are 4 players) and arrange them secretly in growing order with the smallest number is on the left to make his/her code. If the code contains twice the same number, the black tile is always considered as smaller than the white one. A player turn consists in drawing one of the remaining tiles, look at it secretly and propose a value for one of the hidden tiles in an opponent code. If the proposed value is not correct, then the player must insert revealed the tile he/she drawn at the correct place within his/her code giving consequently information about his/her code. If the proposed values was correct the opponent must reveal the tile and the active player may decide go on proposing values for hidden opponent tiles until he/she either guess incorrectectly or decide to stop.
When he/she decides to stop he/she inserts without revealing it the drawn tile at the correct place in his/her code making consequently the code longer.
A player loses the game once his/her code is completely revealed.
Variant play
To make the game more complex two (one white and one black) additional joker tiles can be added. Those tiles can be placed anywhere within the code.
