1, if you don't consider the way of "lower right" (that is, you can only go right or down), A will go to the black box first, while B will go to the white box when he leaves, so B will win because the end point is the white box;

2. If you can go "lower right", then there will be variables. At this time, if you want to win, you must make sure that when you reach the far right or the bottom, you are in a white box, so you win. So B's strategy is: Go as you please. That is to say: if a goes to the right, b goes to the right; A goes down, B goes down; A goes to "lower right" and B goes to "lower right". By doing so, you can ensure that your distance from the boundary is an odd grid, that is, when you reach the boundary, B is in the white grid, and there is only one direction after reaching the boundary. At this time, B is sure to win in the white box.

I wonder if there are loopholes in the solution I just came up with? * * * Just like Cha.

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