fagdag-kotlin-boc-agent

Battle of code, kotlin agent base

The game we are playing

The game we are playing is called Get1000.

The game consists of a series of rounds, each with 9 consecutive dice rolls.

For each roll players simultaneously place the number of eyes in a 3x3 grid.

When all nine rolls have been placed, the round is finished, and the sum of the grid is calculated as seen below.

		H	T	O
		1	1	2
	+	3	4	2
	+	2	3	4
=		6	8	8

The winner of a round, is the player with the smallest distance to 1000.

In this case the distance would be |1000 - 688| = 312.

		H	T	O
		4	1	2
	+	3	4	2
	+	2	3	1
=		9	8	5

Another player placed the same sequence of values like this, and got the distance |1000 - 985| = 15, and is therefore the winner of this round.

Time to respond and Illegal moves

For each roll, the value is delivered to all connected agents over websocket, then each agent has at most one second to respond. Using less then half a second should be safe.

If an agent fails to respond in time, or attempts an illegal placement, the agent forfeits the entire match. An illegal placement would for example be to attempts to place the current value in the full hundreds (H) column in the grid below.

		H	T	O
		1	1	2
	+	3
	+	2
=		6	1	2

The winner is the first agent to 20 wins.

Let's get coding

Open the file MyAgent.kt

Add your teams name to the NAME constant. The HOST ROOM and WS_URI constants can be ignored for now.

For each dice roll the function fun myStrategy(roll : DiceRoll) : Placement will be in invoked.

Remember:

• It is up to the agent to keep track of the current state of the game.
• It is up to the agent to figure out legal placements.
• It is up to the agent to respond in time with a legal placement.
• When a round is over, the next starts immediately with a new dice roll. The agent will therefore also have to keep track of when the grid is full and a new round starts.

Good Luck!

Testing

You can test against the WS:$HOST:8443/test websocket URI. It will only provide feedback on the correctness in terms of placements of your strategy. It does not warn about too slow response.

Playing for real

When we play for real we shift over to the WS:$HOST:8443/agent URI. When we do test rounds, they will be against this URI. The ROOM constant should be set to a value given by an admin.

Useful kotlin resources

Data classes

Control flow

Functions

Collections

I Want to develop in language X instead

You will then need to implement the WebSocket client. See AgentClient.kt for the kotlin equivalent.

Then you need to use these JSON messages:

First to join a room, send:

{"action":["no.sonat.game.JoinRoomAction",{"id":"Sonat","name":"MegaMan"}]}

On success you will get response:

{"response":["no.sonat.game.JoinResponse",{"id":"Sonat"}]}

Then you have to wait, and once game starts you will get dice rolls which looks like this:

{"response":["no.sonat.game.DiceRoll",{"value":2}]}

Which you need to respond to like this:

{"action":["no.sonat.game.PlacementAction",{"id":"Sonat","name":"MegaMan","placement":"HUNDREDS"}]}