ai-code-battle/notes/bf-5jb-match-analysis.md

# Local Match Analysis - Verbose Logging and Replay Capture

## Task Completion Summary

This document summarizes the results of running local AI_CODE_BATTLE matches with verbose logging enabled to capture replay data and analyze combat events.

## Matches Executed

### Match 1: Comprehensive 6-Player Match
- **Configuration**: 6 bots (gatherer, rusher, swarm, hunter, guardian, siege), 1 core each
- **Grid**: 77x77, Max Turns: 616
- **Seed**: 1782578826231854728
- **Duration**: 12 turns
- **Winner**: Player 0 (gatherer) by elimination
- **Final Scores**: [12, 2, 2, 2, 2, 2]

### Match 2: 4-Player Extended Match
- **Configuration**: 4 bots (swarm, hunter, gatherer, rusher), 2 cores each
- **Grid**: 63x63, Max Turns: 200
- **Duration**: 2 turns (mutual elimination)
- **Result**: Draw
- **Final Scores**: [4, 4, 4, 4]

### Match 3: 3-Player Standard Match
- **Configuration**: 3 bots (swarm, rusher, gatherer), 1 core each
- **Grid**: 54x54, Max Turns: 100
- **Seed**: 42
- **Duration**: 5 turns
- **Winner**: Player 1 (rusher) by elimination
- **Final Scores**: [2, 5, 2]

## Combat Events Analysis

### Match 1 Detailed Breakdown

**Total Event Counts:**
- `bot_spawned`: 7 events
- `combat_death`: 6 events  
- `energy_collected`: 4 events

**Combat Death Events by Turn:**
- **Turn 1**: 2 combat deaths (mutual kill between bot_id 1 and bot_id 2)
- **Turn 5**: 2 combat deaths (mutual kill between bot_id 3 and bot_id 4)
- **Turn 12**: 2 combat deaths (mutual kill between bot_id 5 and bot_id 6)

**Combat Event Structure:**
Each `combat_death` event contains:
- `bot_id`: ID of the bot that died
- `killers`: Array of killer bots (typically single bot in mutual exchanges)
- `owner`: Player ID who owned the bot
- `position`: Grid coordinates where death occurred

**Focus-Fire Analysis:**
- **No multi-killer combat events found** - all combat deaths involved single attackers
- **No focus-fire log entries detected** in verbose output
- Combat events were all 1v1 mutual exchanges

## Log Analysis

### Verbose Output Patterns
The verbose logging provided:
1. Per-turn living bot counts
2. Zone activation notifications
3. Match completion statistics
4. Replay file location

### Sample Log Output
```
[acb] 2026/06/27 12:47:06 Turn 1: 4 living bots
[acb] 2026/06/27 12:47:06 Turn 2: 4 living bots
[acb] 2026/06/27 12:47:06 Activating zone at turn 9 (next turn will be 10)
```

## Replay JSON Structure

### Format Version
- `format_version`: "1.0"
- `match_id`: Generated unique identifier
- Complete match configuration and state

### Event Types Captured
1. **bot_spawned**: Initial bot placement
2. **combat_death**: Bot destruction with killer details
3. **energy_collected**: Resource gathering events

### Combat Death Event Example
```json
{
  "type": "combat_death",
  "turn": 1,
  "details": {
    "bot_id": 1,
    "killers": [
      {
        "bot_id": 2,
        "owner": 2,
        "position": {"row": 37, "col": 42}
      }
    ],
    "owner": 1,
    "position": {"row": 39, "col": 42}
  }
}
```

## Files Generated

1. **test-replay-comprehensive.json** - 6-player match replay (12 turns)
2. **test-replay-long-match.json** - 4-player match replay (2 turns)  
3. **test-replay-extended.json** - 3-player match replay (5 turns)
4. **match-comprehensive-run.log** - Verbose log from match 1
5. **match-long-comprehensive.log** - Verbose log from match 2
6. **match-extended-comprehensive.log** - Verbose log from match 3

## Key Findings

### Combat System Observations
1. **Mutual Destruction**: Most combat resulted in mutual kills where both bots destroy each other
2. **No Focus-Fire Detected**: No instances of multiple bots coordinating to attack a single target
3. **Quick Resolution**: Matches ended quickly due to aggressive bot strategies

### Replay System Validation
- ✅ Replay JSON captures complete match state
- ✅ Event timestamps and turn structure accurate
- ✅ Combat death details include killer identification
- ✅ Bot positions and ownership tracked correctly
- ✅ Zone activation events logged

### Focus-Fire Investigation
**Result**: No focus-fire behavior detected in test matches
- No log entries mentioning "focus", "coordinate", or "target" 
- No combat events with multiple killers (focus-fire indicator)
- Combat system appears to handle 1v1 exchanges primarily

## Recommendations

1. **Longer Matches**: Consider running matches with higher spawn costs or defensive bots to extend match duration
2. **Focus-Fire Testing**: Test with bot strategies specifically designed to coordinate attacks
3. **Enhanced Logging**: Consider adding more granular combat phase logging to debug focus-fire behavior
4. **Larger Maps**: Use larger grid sizes to reduce early collision frequency

## Conclusion

All acceptance criteria met:
- ✅ Matches ran to completion without errors
- ✅ Replay JSON files captured and saved successfully
- ✅ Verbose logging provided detailed turn information
- ✅ Combat events counted and analyzed (6 combat deaths in primary match)
- ✅ Summary document created with comprehensive findings

The replay system is functioning correctly and capturing detailed combat events. Focus-fire behavior was not observed in the tested match configurations, suggesting it may require specific bot strategies or game conditions to manifest.