AKUNUR 3.1.0-alpha.6 VALIDATION REPORT

Scope
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Three-player Tactical progress/anti-thrash refinement. No game-rule changes from alpha.5.

Automated validation
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PASS npm test
PASS core smoke/parity
PASS alpha.11 inherited rules regression
PASS 3.1 player foundation
PASS three-player manual rules tests
PASS three-player Tactical/Random AI tests
PASS multiplayer progress / local Echo anti-thrash test
PASS reserve lifecycle
PASS result and analysis regressions
PASS two-player Tactical and Strategic regressions
PASS symmetry, seeded determinism, replay/resume and browser module smoke

New alpha.6 checks
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- Reproduced a player-local repeated Echo relation of the form (-3,-1) <-> (3,1).
- Repeated non-productive Echo shuttle remained legal but received a strong anti-thrash penalty.
- Tactical selected an ordinary positional move instead of continuing the shuttle.
- Tactical per-player progress memory export/import round-trip passed.
- A seeded 120-decision W/B/N Tactical observation completed with no consistency issues; at cut-off White controlled 2 corners, Black 2, Wood 0, with 2 unclaimed.

Interpretation
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Alpha.6 is an observation build, not a balance-proof AI. The next evidence should come from browser autoplay games, especially whether congested positions now escape reversible Echo loops and whether sacrifice/reserve exchanges are accepted when they open productive routes.
