109.--_Noughts and Crosses._

The solution is as follows: Between two players who thoroughly understand

the play every game should be drawn. Neither player could ever win except

through the blundering of his opponent. If Nought (the first player)

takes the centre, Cross must take a corner, or Nought may beat him with

certainty. If Nought takes a corner on his first play, Cross must take

the centre at once, or again be beaten with certainty. If Nought leads

with a side, both players must be very careful to prevent a loss, as

there are numerous pitfalls. But Nought may safely lead anything and

secure a draw, and he can only win through Cross's blunders.

The Canterbury Puzzles, and Other Curious Problems · 第 280 / 286 题