Sum Number Game

1. Two players take turns to remove one number at a time from the set of numbers 1, 2, 3, 4, 5, 6, …7 from the board in the centre.
2. First, Player 1 will pick a number from the board.
3. Then Player 2 will continue to pick a number from the rest of the numbers on the board.
4. This game will continue until there are 3 numbers left on the board, the sum of these 3 numbers will be calculated. If the remaining sum is a multiple of 3, then Player 2 wins the game; otherwise, player 1 wins.