Problem: 2-player matches had zero combat_death events. Recent combat density
work (bf-4tfh) addressed 3+ player matches but 2-player duels still had zero
combat.
Root cause: 25% spawn radius on 40x40 grid placed bots ~20 tiles apart, with
default zone timing (start turn 50) giving ample time to avoid contact.
Solution:
- Reduce 2-player spawn radius to 20% (from 25%) → ~16 tiles apart at spawn
- Increase 2-player attack radius to 3.5 tiles (from 3) → AttackRadius2=12
- Aggressive 2-player zone: start turn 30, shrink every 2 turns, min radius 3
Results:
- 2-player: 10/10 seeds have combat_death (was 0/10), avg 2.0 per match
- 3-player: 80% have combat_death (was 70%), no regression
- 4-player: 100% have combat_death, avg 3.6 (was 3.2), no regression
Closes: bf-5w8z
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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