From 9c8c17b70cc429034edd3a2a7caa639688dcd0cc Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Sat, 4 Apr 2026 17:58:24 +0300
Subject: [PATCH] Tweak the blessed potion of see invisible

Blessed potion guarantees the intrinsic, if you're
invisible and can see invisible before quaffing.
---
 src/potion.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/potion.c b/src/potion.c
index 9db0d3471..d56b64155 100644
--- a/src/potion.c
+++ b/src/potion.c
@@ -841,6 +841,7 @@ staticfn void
 peffect_see_invisible(struct obj *otmp)
 {
     int msg = Invisible && !Blind;
+    int permchance = 10 - (HInvis ? 3 : 0) - (HSee_invisible ? 6 : 0);
 
     gp.potion_unkn++;
     if (otmp->cursed)
@@ -863,7 +864,7 @@ peffect_see_invisible(struct obj *otmp)
          */
         make_blinded(0L, TRUE);
     }
-    if (otmp->blessed && !rn2(10))
+    if (otmp->blessed && !rn2(permchance))
         HSee_invisible |= FROMOUTSIDE;
     else
         incr_itimeout(&HSee_invisible, rn1(100, 750));