Player 2

$y_1$

$y_2$

Player 1

$x_1$

$\left(\mathrm{2,1}\right)$

$\left(-\mathrm{1,}-1\right)$

$x_2$

$\left(-\mathrm{1,}-1\right)$

$\left(\mathrm{1,2}\right)$