Mechanisches Boardstärke-Modell: Statsheet aus cdragon-Exaktdaten, sqrt(eHP×DPS), Tier-Anker, Tau-Fit

A/B auf 38 Holdout-Matches: mechanical 0.724 vs legacy 0.695. Promotion durchgeführt.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

backend/tests/test_score.py

@@ -112,7 +112,61 @@ def test_stat_mults_identical_units_are_neutral():
     assert all(m == 1.0 for m in mults.values())
 
 
-def test_stat_mult_raises_score():
+def test_stat_mult_raises_score_legacy():
+    from tft.model.score import score_board_legacy as score_board
+
     art = {**ARTIFACT, "stat_mults": {"TFT17_B": 1.1}}
     board = [{"api_name": "TFT17_B", "stars": 1, "items": []}]
     assert score_board(board, [], art) > score_board(board, [], ARTIFACT)
+
+
+def _mech_artifact():
+    from tft.model import artifact as artifact_mod
+
+    static = {
+        "meta": {"set": 17, "patch": "test"},
+        "units": {
+            "TANK": {"cost": 2, "traits": ["T_AD"], "role": "Tank",
+                     "stats": {"hp": 900, "armor": 50, "magicResist": 50, "damage": 45,
+                               "attackSpeed": 0.6, "mana": 60, "initialMana": 0},
+                     "spell_damage": None, "spell_scaling": None},
+            "CARRY": {"cost": 2, "traits": ["T_AD"], "role": "Marksman",
+                      "stats": {"hp": 600, "armor": 20, "magicResist": 20, "damage": 70,
+                                "attackSpeed": 0.8, "mana": 50, "initialMana": 0},
+                      "spell_damage": [0, 250, 375, 560, 0, 0, 0], "spell_scaling": "ad"},
+        },
+        "traits": {"T_AD": {"breakpoints": [
+            {"min_units": 2, "style": 1, "variables": {"BonusAP": 20.0}}]}},
+        "items": {"SWORD": {"effects": {"AD": 0.35}}},
+        "augments": {},
+    }
+    return artifact_mod.build(static)
+
+
+def test_mechanical_balanced_beats_lopsided():
+    from tft.model.score import score_mechanical
+    art = _mech_artifact()
+    balanced = [{"api_name": "TANK", "stars": 1, "items": []},
+                {"api_name": "CARRY", "stars": 1, "items": []}]
+    tanks = [{"api_name": "TANK", "stars": 1, "items": []} for _ in range(2)]
+    assert score_mechanical(balanced, [], art) > score_mechanical(tanks, [], art)
+
+
+def test_mechanical_items_and_stars_raise_strength():
+    from tft.model.score import score_mechanical
+    art = _mech_artifact()
+    base = [{"api_name": "CARRY", "stars": 1, "items": []}]
+    starred = [{"api_name": "CARRY", "stars": 2, "items": []}]
+    equipped = [{"api_name": "CARRY", "stars": 1, "items": ["SWORD"]}]
+    assert score_mechanical(starred, [], art) > score_mechanical(base, [], art)
+    assert score_mechanical(equipped, [], art) > score_mechanical(base, [], art)
+
+
+def test_mechanical_recognized_trait_buffs_stats():
+    from tft.model.score import score_mechanical
+    art = _mech_artifact()
+    pair = [{"api_name": "TANK", "stars": 1, "items": []},
+            {"api_name": "CARRY", "stars": 1, "items": []}]
+    solo_sum = (score_mechanical(pair[:1], [], art)
+                + score_mechanical(pair[1:], [], art))
+    assert score_mechanical(pair, [], art) > solo_sum