depth_shell_saturation

Idea: Park all 30 strikers just outside gun range in three interleaved depth shells, then release them on one tick so that no two strikers ever share a blast radius and every interceptor kills at most one.

Which part of convergence_blast_scheduler's logic this attacks -------------------------------------------------------------- The defender gets its strength from a plan built on blast groups. It predicts radial positions at a deadline radius of about 40 and picks an aim track whose 0.9 * blast neighbourhood covers the most strikers. It waits until neighbouring strikers converge inside one blast so that each interceptor kills two or three. Against a single synchronized ring of 30, the neighbour spacing at r = 40 is about 8.4. That is inside the 9-unit coverage radius, so its 20 interceptors reach 30 strikers.

This bot removes that geometry and keeps the gun saturation:

• 30 slots, 12 degrees apart, are split into 3 shells, using slot index mod 3. The shells stage at radii 118, 130 and 142. Inside one shell, neighbours are 36 degrees apart, which is 25 units at r = 40 and 15.7 at r = 25. Neighbours in adjacent shells are 12 degrees apart and also 12 units apart in depth. The blast-group planner therefore finds only singleton groups, and its 20 interceptors can kill at most about 17 strikers.
• Staging uses the defender's own threat filter against it. Tracks that are not closing (vr <= 1) at r >= 100 are dropped from E entirely. Drones pace tangentially on their slot, with radial velocity near 0, outside gun range. The bot launches nothing at them and its gun cannot reach them.
• All shells release on the same tick. Arrivals fall about 3 ticks apart per shell, so roughly 13 surviving strikers reach a one-target gun within a few ticks of each other.

What in the replays shows it breaks there -----------------------------------------

• Every loss to synchronized_ring ended the same way: stock_left 0, 20 launched, and 21 to 24 interceptor kills. Those extra kills came only from converged-ring doubles. The surviving 3 or 4 strikers arrived within 2 ticks of each other and the gun managed only 2 to 5 kills.
• The rush replay (26 kills from 4 interceptors) shows the defender's margin comes entirely from clustering. Without clusters it is out of interceptors well before the last third of the swarm.