横四方固 Yoko-shiho-gatame (side-locking four corner hold) YSG

A hold-down. From your opponent’s right side, lean over him at a right angle and hold him down on his back with your body. Pass your right arm between his legs to grip the left side of his belt, and pass the other arm under his neck to grip his left collar, then use your chest to pin him with weight of your body, anchored at his four corners.