The First Player Wins
In Y the strategy-stealing argument can be applied. It proves that the second player has no winning strategy. The argument is that if the second player had a winning strategy, then the first player could choose a random first move and then pretend that she is the second player and apply the strategy. An important point is that an extra pawn is never a disadvantage in Y. Y is a complete and perfect information game in which no draw can be conceived, so there is a winning strategy for one player. The second player has no winning strategy so the first player has one. It is nevertheless possible for the first player to lose by making a sufficiently bad move, since although that stone has value, it may have significantly less value than the second moveāan important consideration for understanding the nature of the pie rule.
If the "pie rule" is in force, however, the second player wins, because the second player can in principle evaluate whether or not the first move is a winning move and choose to invoke the pie rule if it is (thereby effectively becoming the first player).
It should be noted that in practice, assuming the pie rule is in force and the official Schensted/Titus board is being used, Y is very well balanced game giving essentially equal chances for any two imperfect mortal players of equal strength. The balance is achieved because the first player will intentionally make a move that is sufficiently "bad" that it is not clear to the second player whether it is a winning move or a losing move. It is up to the judgement of the second player to make this difficult determination and invoke the pie rule accordingly.
Read more about this topic: Y (game)
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