gistfile1.txt

pragma solidity ^0.4.0;

contract TicTacToe {
    
    struct Game {
        address[2] players;
        uint256 prize_pool;
        uint256[9] board;
    }
    
    mapping(uint256 => Game) games;

    function TicTacToe() {
    }

    function join(uint256 game_id, uint256 player_num) public payable {
        require(msg.value == 1000000000000000000);
        require(player_num == 0 || player_num == 1);
        require(games[game_id].players[player_num] == 0);
        
        games[game_id].prize_pool += msg.value;
        games[game_id].players[player_num] = msg.sender;
    }

    function move(uint256 game_id, uint256 player_num, uint256 go_here) public {
        require(games[game_id].prize_pool > 0);
        require(games[game_id].players[player_num] == msg.sender);
        
        uint256 moves = 0;
        for (uint256 i = 0; i < 9; i++) {
            if (games[game_id].board[i] != 0) {
                moves++;
            }
        }
        
        if (player_num == 0) {
            require(moves % 2 == 0);
        } else {
            require(moves % 2 == 1);
        }
        
        require(games[game_id].board[go_here] == 0);
        
        uint256 my_piece = player_num + 1;
        
        games[game_id].board[go_here] = my_piece;
        
        if ((games[game_id].board[0] == my_piece &&
            games[game_id].board[1] == my_piece &&
            games[game_id].board[2] == my_piece) ||
            (games[game_id].board[3] == my_piece &&
            games[game_id].board[4] == my_piece &&
            games[game_id].board[5] == my_piece) ||
            (games[game_id].board[6] == my_piece &&
            games[game_id].board[7] == my_piece &&
            games[game_id].board[8] == my_piece) ||
            
            (games[game_id].board[0] == my_piece &&
            games[game_id].board[3] == my_piece &&
            games[game_id].board[6] == my_piece) ||
            (games[game_id].board[1] == my_piece &&
            games[game_id].board[4] == my_piece &&
            games[game_id].board[7] == my_piece) ||
            (games[game_id].board[2] == my_piece &&
            games[game_id].board[5] == my_piece &&
            games[game_id].board[8] == my_piece) ||
            
            (games[game_id].board[0] == my_piece &&
            games[game_id].board[4] == my_piece &&
            games[game_id].board[8] == my_piece) ||
            (games[game_id].board[2] == my_piece &&
            games[game_id].board[4] == my_piece &&
            games[game_id].board[6] == my_piece)) {
                
            msg.sender.transfer(games[game_id].prize_pool);
            games[game_id].prize_pool = 0;
        } else if (moves == 8) {
            games[game_id].players[0].transfer(games[game_id].prize_pool / 2);
            games[game_id].players[1].transfer(games[game_id].prize_pool / 2);
            games[game_id].prize_pool = 0;
        }
    }
}