This game is played on a table where tokens are arranged in a line. The values inscribed on the tokens, from left to right, are initially 7238941632471. Taking turns, each player takes one of the two tokens at the ends of the line and adds it to their reserve. At the end of the game, the players calculate the sum of all the tokens in their reserve, and the one with the highest total wins.
Let's examine a starting position with an even number of tokens, which we number from left to right. Then, if the sum of the tokens in even positions is different from that of the tokens in odd positions, the player who starts can always win: they can always arrange to take all the tokens of the same parity. We note that no matter the first player's move, we end up in this situation, and that the difference between the sum of even and odd tokens is sufficient to compensate for the first token taken by the first player. The second player therefore always wins. For example, if the first player takes the token 7, we then number the tokens, and the sum of the tokens in odd positions is 29, that of the tokens in even positions is 21. The second player therefore wins 29 to 28 by taking all the tokens in odd positions, starting with the 2.