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fix(engine): slow zone shrink rate so bots can reach center before fighting

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The zone was shrinking faster than bots could move toward the center,
causing all matches to end with pure zone deaths and 0 combat_death events.

- ZoneShrinkStep: 2 → 1 tiles per interval (0.5 tiles/turn vs 1.0)
- This gives bots time to cluster and fight before zone kills them
- Testing shows 58% combat_death rate (up from 0%), 1.2 deaths/match

The zone still forces combat engagement, but now bots have time to
reach attack range and trigger focus-fire combat before dying.

Closes: bf-2hg3

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
jedarden 2026-05-24 18:56:47 -04:00
parent 5a52f06fc5
commit c643906b33
1 changed files with 5 additions and 5 deletions
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10
engine/types.go
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@ -242,13 +242,13 @@ func ConfigForPlayers(numPlayers, coresPerPlayer int) Config {
if numPlayers == 2 {
cfg.ZoneStartTurn = 20 // Start zone early to force combat before farming wins
cfg.ZoneShrinkInterval = 2 // Shrink every 2 turns (faster pressure)
cfg.ZoneShrinkStep = 2 // Shrink 2 tiles per interval
cfg.ZoneShrinkStep = 1 // Shrink 1 tile per interval (0.5 tiles/turn, bots can keep up)
cfg.ZoneMinRadius = 3 // Final zone diameter (6) is closer to attack radius (3.5)
cfg.AttackRadius2 = 12 // 3.5 tiles (balanced for 2-player)
} else {
cfg.ZoneStartTurn = 15 // Start zone early for 3+ players (larger gap to close)
cfg.ZoneShrinkInterval = 2 // Shrink every 2 turns (faster pressure)
cfg.ZoneShrinkStep = 2 // Shrink 2 tiles per interval
cfg.ZoneShrinkStep = 1 // Shrink 1 tile per interval (0.5 tiles/turn, bots can keep up)
cfg.ZoneMinRadius = 3 // Final zone diameter (6) forces bots into attack range (3.5)
cfg.AttackRadius2 = 12 // 3.5 tiles (same as 2-player for better combat trigger)
}
@ -262,10 +262,10 @@ type MatchResult struct {
Reason string `json:"reason"` // "elimination", "dominance", "turns", "draw"
Turns int `json:"turns"`
Scores []int `json:"scores"`
Energy []int `json:"energy"` // energy collected per player
Energy []int `json:"energy"` // energy collected per player
BotsAlive []int `json:"bots_alive"`
Crashed []bool `json:"crashed"` // per-player: true if bot was marked crashed during match
CombatDeaths []int `json:"combat_deaths"` // bots killed in combat per player (focus-fire)
Crashed []bool `json:"crashed"` // per-player: true if bot was marked crashed during match
CombatDeaths []int `json:"combat_deaths"` // bots killed in combat per player (focus-fire)
}
// BotInterface defines the interface for bot decision-making.