feedback6 R21A: a 突袭 member may land on a teammate's half when both halves of the field are taken — the two-helper 联防 field and the Final Assault / Hidden Core pair field (the owner's decision of 2026-10-07): Battle.onFieldBoard (onOwnBoard of any player of the battle) read by raidTile only; a lone 联防 helper's empty half, a solo boss field's other half and the hand / 临时整备区 rows stay closed, every other landing rule kept, 乌尔比安's S3 【移动】 keeps onOwnBoard; golden: 8 moved, each parting from the parent at a member's first landing on its teammate's half (checked tick by tick with the parent instrumented) — fields boss-boss_2 / 3 / 4 / 5 / 6-pair and hidden-boss_8 / 10-pair (the right player's 缄默德克萨斯 / 伊内丝 / 仇白 / 耀骑士临光 on the left player's half, 1–7 landings per battle, the first 0.3–39.8 s in), matches coop4-ABYSS-7 (round 6's two-helper 联防: ai_2's 斯卡蒂 on ai_1's half at 52 s; only ai_1 / ai_2 dmgDealt move, 8263 between them); unite-2 unchanged (its two landings stay on their own half)

Tests: test/sim/feedback5-raid-own-board.test.js — the pair field (the right player's member onto the left telin's board tile (2,3), the left player's onto the mirrored right (2,17), the hand rows closed) and the two-helper 联防 (each helper onto the other's half; 乌尔比安 beside a teammate stays on his own) fail on the parent; the solo boss field's hand rows and the lone helper unchanged.
Docs: docs/history/0.2.1.md (new, §26; §26.1 cites the owner's decision and PRTS 卫戍协议/帮助 §联防阶段), the DESIGN index row and versions line, a pointer from §25.18.1, docs/SIM.md (onFieldBoard; onOwnBoard now 乌尔比安's only).

server/sim/content/kits/ops/chess_char_5_05-ulpia.js

@@ -95,9 +95,11 @@ export default {
           if (stop === 0 || !unit.alive) return;
           // PRTS 备注: landing tile > the tile one beyond it > his own tile (a deployable, free, unreserved melee tile).
           // "可部署" is a tile his player may deploy on: his own board (Battle.onOwnBoard) — never the other half of a 联防 or
-          // boss field nor a boss field's hand / 临时整备区 rows. Community report of 2026-10-06 (item 27) 「乌尔比安使用3技能会在
-          // 联防阶段跳到红门后」: on the one-helper 联防 map (escaped_single, enemies from the middle gate at col 10) an anchor that
-          // met no enemy flew on to the right half, where no enemy ever walks, and he moved there for the whole skill
+          // boss field nor a boss field's hand / 临时整备区 rows; a teammate's half stays closed to him even where the 突袭
+          // landing may take it (Battle.onFieldBoard, DESIGN §26.1). Community report of 2026-10-06 (item 27)
+          // 「乌尔比安使用3技能会在联防阶段跳到红门后」: on the one-helper 联防 map (escaped_single, enemies from the middle gate at
+          // col 10) an anchor that met no enemy flew on to the right half, where no enemy ever walks, and he moved there for
+          // the whole skill
           const ok = ([r, c]) => (r !== unit.tileR || c !== unit.tileC) && battle.grid.inRect(r, c) && battle.onOwnBoard(unit.player, r, c) && battle.grid.canStand(r, c) && !battle.grid.isObstacle(r, c) && !battle.isReservedTile(r, c);
           const dest = [[sr, sc], frontOf(unit.tileR, unit.tileC, unit.dir, stop + 1)].find(ok);
           if (dest == null) return;