Player 2’s pure strategies

$s_1$

$t_1$

Strategy 1

If player 1 chooses $s_1$ , then $s_2$ .

If player 1 chooses $t_1$ , then $s_2$ .

Strategy 2

If player 1 chooses $s_1$ , then $s_2$ .

If player 1 chooses $t_1$ , then $t_2$ .

Strategy 3

If player 1 chooses $s_1$ , then $t_2$ .

If player 1 chooses $t_1$ , then $s_2$ .

Strategy 4

If player 1 chooses $s_1$ , then $t_2$ .

If player 1 chooses $t_1$ , then $t_2$ .