AKUNUR 3.1.0-alpha.9 VALIDATION REPORT

Scope
-----
Three-player Tactical multiplayer-awareness layer. No game-rule changes from
3.1.0-alpha.8. The alpha.7 Still Point route planner and alpha.8 persistent
corner planner are retained.

Focused alpha.9 validation
--------------------------
PASS multiplayer-awareness-test
  - both trailing players independently identify the same two-corner leader
  - breaking a leader's third-corner support reduces its threat score
  - a player's own near-winning plan suppresses non-immediate leader pressure
  - a ready opponent third corner is recognised as an emergency shared threat
  - a trailing player may temporarily retarget toward the leader's structure
  - Tactical actually chooses a legal support-breaking capture which does not
    advance its own corner target and records it as a Leader response

Retained multiplayer validation
-------------------------------
PASS corner-strategy-test
  - ready third-corner conversion
  - sticky corner commitment / sustained-failure retarget
  - opponent two-corner threat targeting
PASS still-point-route-planner-test
  - qualification route commitment
  - supported blocker clearance
  - productive reversible sacrifice
  - passage execution
  - sticky route commitment / passage override
PASS three-player-ai-test
PASS multiplayer-progress-test
PASS three-player-manual-test
PASS player-foundation-test
PASS reserve-lifecycle-test

Inherited regression
--------------------
PASS smoke
PASS parity
PASS alpha.11 rules regression
PASS result regression
PASS analysis regression
PASS two-player Tactical regression
PASS two-player Strategic regression
PASS symmetry regression
PASS seeded determinism regression
PASS replay/resume regression
PASS browser module smoke

The two-player Tactical and Strategic agents therefore remain green after the
three-player alpha.9 work.

Performance / search checks
---------------------------
- alpha.7 qualification Still Point exit pruning retained;
- alpha.8 corner-awarded Echo placement pruning retained;
- repeated corner-formation analysis remains cached per state revision;
- alpha.9 post-qualification ordinary Still Point transits preserve all normal
  moves but pre-rank large transit-exit sets before detailed Tactical scoring;
- multiplayer threat profiles use lightweight public-board geometry rather than
  a nested opponent game-tree search.

A 120-decision direct three-player Tactical engine regression completed with
consistent state and no illegal actions. The Lab's full diagnostic path is
intentionally heavier than browser autoplay. The monolithic `npm test` command
is not used as the pass criterion in this constrained environment; every
component in that command was run separately and passed.

Interpretation
--------------
Alpha.9 is an observation/testing build, not a mathematical balance proof. Its
purpose is to add the final major heuristic multiplayer behaviour before 3.1
release validation: self-interested temporary pressure on a clearly leading
opponent without explicit alliance state or communication.
