A simplicistic implementation of 4-in-a-row/connect 4 in javascript with a bot that uses the monte carlo tree search for its AI.

• Implemented with webworkers and canvas for rendering
• Monte carlo tree search
• Starting player is randomly selected

To win, place 4 of your stones in a horizontal, vertical or diagonal line.

If it's the AIs turn, for every free column it simulates placing a stone in it and then continues to fill the board randomly 1000 times, until one player wins (adjustable in the "difficulty" setting). It then selects the column with the best win/loss ratio.