diff --git a/packages/engine/src/game.ts b/packages/engine/src/game.ts
index 95cb674..6f60a60 100644
--- a/packages/engine/src/game.ts
+++ b/packages/engine/src/game.ts
@@ -599,6 +599,9 @@ function castSightEdge(
   cell: Cell,
   side: Side,
 ): boolean {
+  // The caster's own eye, as for square-aimed casts: a held door stands
+  // open, and the door at their elbow they may pull ajar and look through.
+  board = doorsAjar(state, caster.id, openedDoors(state, board));
   if (losToEdge(board, caster.position, cell, side)) return true;
   if (displays(caster, "visionstone") &&
       throughOneEdge(board, (b) => losToEdge(b, caster.position, cell, side))) {
diff --git a/packages/engine/test/durations-doors-cards.test.ts b/packages/engine/test/durations-doors-cards.test.ts
index 3979df4..e769300 100644
--- a/packages/engine/test/durations-doors-cards.test.ts
+++ b/packages/engine/test/durations-doors-cards.test.ts
@@ -458,6 +458,26 @@ describe("a held door is an open doorway to the eye", () => {
     expect(cast.ok).toBe(true);
   });
 
+  it("a wall beyond the unlocked door is in sight for wall-aimed spells too (BDFS)", () => {
+    // Edge casts once judged sight on the bare board, where every door
+    // hangs shut — the threshold peek reached only square-aimed spells.
+    let { state, cell, side, holder } = sightRig();
+    const near = neighbor(cell, side);
+    const view = boardView(state);
+    const far = SIDES.find((s) => s !== opposite(side) && view.edges[edgeKey(near, s)] === "wall");
+    if (!far) throw new Error("setup: no wall on the far side of seed 42's door");
+    const pick = giveCard(state, holder, "pick-lock");
+    state = must(state, holder, {
+      type: "cast", instanceId: pick.instanceId,
+      target: { kind: "edge", cell, side },
+    });
+    const dw = giveCard(state, holder, "destroy-wall", "DW", 1);
+    const cast = applyCommand(state, holder, {
+      type: "cast", instanceId: dw.instanceId, target: { kind: "edge", cell: near, side: far },
+    });
+    expect(cast.ok).toBe(true);
+  });
+
   it("a lock REMOVED lets any wizard beside the door peek through", () => {
     let { state, cell, side, holder, pursuer } = sightRig();
     const rm = giveCard(state, holder, "remove-lock");