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Ajax Tiles is an online video game played by two artificial intelligences on a board
of 24x12 square tiles. Each player attempts to conquer as many tiles as possible,
which may involve capturing tiles owned by the other player or permanently
disabling tiles to avoid being attacked in return. The game ends when no neutral tiles
You may see an example here:
The game is written entirely in JavaScript. An AI is merely an URL that the game will
query to ask for the next move. The request contains a complete description of the
game board as an array of arrays, and the response is expected to be an object of
the form {x:1,y:5} indicating the coordinates of the tile to click.
Rules of the game
Every tile is represented by a string. These are :
'' (empty string) : an empty tile.
'b' : a tile owned by the blue player.
'r' : a tile owner by the red player.
'd' : a contaminated tile.
'n' : a nuked tile.
Clicking on an empty tile paints it with your color. Clicking on a tile you own will
nuke it (the four adjacent tiles will be contaminated when this happens). Clicking on
any other tile simply passes your turn.
The game board starts with several nuked tiles (and the surrounding contaminated
tiles) in order to make things more fun.
When a red and blue tile are placed next to each other (along the edges, not
along the corners), a battle happens. The game counts how many friendly tiles are
connected to each battling tile (again, connected along the edges). The tile
with the least friends becomes empty.
So, a tile connected to 18 friends loses against a tile connected to 35 friends.
If a tie happens, the attacking tile is removed.
If simultaneous battles happen, either the attacking tile defeats all defending
tiles (on their own), or it is defeated.
So, a tile connected to 5 friends wins against two tiles each connected to
4 friends, but loses against two tiles connected to 4 and 6 friends respectively.
Keeping a single blob of connected tiles means that you will win every battle
you will be involved in. On the other hand, your opponent can use nukes to
isolate your blob in a small corner, and proceed to conquer the rest of the board
by itself. So, winning the game involves keeping a balance between being
stronger than your opponent and cornering your opponent.
The AI
When the game needs to know the next move for a player, it sends an HTTP POST
request to the URL of that player's AI. It has two arguments:
color (r or b) : the color of the player controlled by the AI
board (JSON array-of-arrays-of-strings) : the board tiles as board[x][y]
So, $color === $board[3][0] is true if the player controls the tile in the
fourth column, first row.
The AI is allowed to do ANYTHING to provide a response within a 30s limit
(failure to do so results in an immediate loss).
The response should be served as the application/json content-type, and should
be a string of the form {"x":3,"y":0} (that is, a properly encoded JSON
representation of an x,y integer pair). The game will click the corresponding
tile on the board, then ask the other player for its move.
The example AI that plays on the default page is defined in the index.php
file in this repository. Check it out (or fork it).
Testing your AI
Upload it to a server, then connect to and paste
the URL in one of the two "AI Url" boxes. Then, click "New Game"
Alternatively, you may manually set the first or second AI Url boxes through
the game URL:
This sets the red URL to "FOO" and the blue URL to "BAR".
Sharing your AI
Mention it in a fork on github, or send me a tweet (@victorNicollet)
along with the name and author name you would like to see mentioned
(I can include a link to your site, blog, repository or profile if you
provide one).
I will then add it to the game page.
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