import matplotlib.pyplot as plt
import nashpy as nash

xs = np.array([0, 1])
u_cs = [1 - 2 * xs, - 1 + 2 * xs]
plt.plot(xs, u_cs[0], label="$(\sigma_rB)_1$")
plt.plot(xs, u_cs[1], label="$(\sigma_rB)_2$")
plt.xlabel("$\sigma_r=(x, 1-x)$")
plt.title("Utility to column player")
plt.legend()