The simplest decision in rugby: two attackers against one defender in a 10 m channel. The ball carrier runs at the defender’s inside shoulder until they commit, then passes late to the support runner, who has held their width and scores. Good from under-10s to seniors. Watch for carriers who pass too early, which lets the defender drift onto the receiver, and support runners who drift in and lose the space. Run it continuously, with the next pair and defender going straight away.