92 lines
3.4 KiB
Markdown
92 lines
3.4 KiB
Markdown
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# Mode playtest notes — engine (GR-E03 / GR-E04)
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**Date:** 2026-08-08
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**Workplan:** [GROUND-WP-0003](../workplans/GROUND-WP-0003-playtest-semi-and-coalitions.md)
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**Source:** [GROUND-RPT-0003](../reports/260807-clay-borg-attack-and-modes.md) (clay-borg attack-value panel + full-mode playouts)
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**Variant:** `ground-darvo-r0` (baseline)
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These notes close the **engine** half of WP-0003 (“human table *or* full
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engine playout”). They are not a substitute for human felt-play if we want
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table texture later; they do answer “do the modes score to the end, and
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what does ATTACK do?”
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---
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## Runs covered
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| Task | Mode | Seats | Evidence |
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|------|------|------:|----------|
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| T01 | MODE_SEMI | 2p | attack-value cells; modes playable to scoring |
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| T02 | MODE_SEMI | 3–4p (and 6p) | same panel |
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| T03 | MODE_COALITION | 2p | same |
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| T04 | MODE_COALITION | 3–4p (and 6p) | same |
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| — | MODE_COOP | all | control cells |
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**Identical-play differentiation (seed 1, 4p, 37 commands):**
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| Mode | Winners |
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|------|---------|
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| SHARED GROUND | all four (mastery 4) |
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| COMMON PROBLEM (semi) | **P3** (top personal) |
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| BONDED COALITIONS | **P1+P2** (best Bond network) |
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Encoding of Modes.csv behaves as three distinct games.
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**Driver note (clay-borg):** GR-E03/E04 were previously unplayed because
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`cb-play` forced SHARED GROUND — fixed on their side; not a modes defect.
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---
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## Outcomes checklist
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### Shared total vs threshold / personal scores
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- Group success rates under “never attack” competent-ish policy (wins per
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200 games, 2/3/4/6 seats):
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- SHARED: 132 / 165 / 190 / 200
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- SEMI (seat-0 among winners framing differs; personal race present): lower individual “among winners” counts
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- COALITION: high “among winners” when not attacking (network still intact)
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- Exact seed-by-seed personal score tables were not shipped in RPT-0003;
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mode differentiation and ATTACK value are the load-bearing results.
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### Stress / DARVO
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- Under competent non-attacking play on baseline r0: **DARVO armed 0 times**
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in the RPT-0003 competent aggregate (500 games cited).
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- Later CB-EV-0031: peak Stress *held* never exceeds start **2** when policies
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never select ATTACK — Stress only falls. Inbound pressure is ATTACK-only
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for those policies.
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### ATTACK value (all three modes)
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| mode | never | sometimes | always |
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|------|------:|----------:|-------:|
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| SHARED | 132/165/190/200 | identical | 0 |
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| SEMI | 59/52/48/44 | 59/52/48/**34** | 0 |
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| COALITION | 131/134/132/116 | **59/52/48/34** | 0 |
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*(2/3/4/6 seats.)* ATTACK never improves outcomes; in coalitions it roughly
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halves “among winners.” E04 attacking numbers match E03 when Bonds break
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(GR-A07 + network scoring).
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### Underdetermined rules exposed?
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- **No new U-items** from mode scoring itself.
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- **Design gap (not rules ambiguity):** ATTACK/DARVO irrelevant under
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competent baseline play — tracked experimentally via WP-0006 (H1,
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reject) → WP-0007 (H2 scoped stress, in flight).
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---
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## Follow-ups
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| Item | Where |
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|------|--------|
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| Restore inbound Stress without flat table tax | H2 `h2-scoped-problem-stress` |
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| Human felt-play of semi/coalition (optional) | residual note below; not blocking |
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| Opening-action economy (INVESTIGATE first) | clay-borg offer; deferred |
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**Residual (optional, not a new workplan unless scheduled):** one human
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2p semi and one 3–4p coalition session for “feels like one game” texture.
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Engine checklist for T01–T04 is satisfied.
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