Heat a grill to medium-high; lightly oil grates.
Meanwhile, generously salt both sides of the chicken and then rub with chili powder; set aside. Sear the chicken over the hotter part of the grill, 1 to 2 minutes on each side. Move the chicken to the cooler part of the grill, cover, and grill, turning occasionally until fully cooked through, 12 to 16 minutes. Transfer to platter and serve hot, warm, or at room temperature.