--- angband-master/src/monster/mon-lore.c	Tue Dec 24 06:58:50 2013
@@ -385,7 +385,7 @@
 /**
  * Determine if the player knows the AC of the given monster.
  */
-static bool know_armour(const monster_race *r_ptr, const monster_lore *l_ptr)
+bool know_armour(const monster_race *r_ptr, const monster_lore *l_ptr)
 {
 	assert(l_ptr);
 	return l_ptr->tkills > 0;
 	
--- angband-master/src/monster/mon-lore.h	Tue Dec 24 06:58:50 2013
@@ -30,6 +30,7 @@
 /** Variables **/
 
 /** Functions **/
+bool know_armour(const monster_race *r_ptr, const monster_lore *l_ptr);
 void cheat_monster_lore(const monster_race *r_ptr, monster_lore *l_ptr);
 void wipe_monster_lore(const monster_race *r_ptr, monster_lore *l_ptr);
 void lore_do_probe(struct monster *m);
 
--- angband-master/src/object/obj-info.c	Tue Dec 24 06:58:50 2013
@@ -25,6 +25,8 @@
 #include "z-textblock.h"
 #include "object/slays.h"
 #include "object/pval.h"
+#include "monster/mon-util.h"
+#include "monster/mon-lore.h"
 
 /*
  * Describes a flag-name pair.
@@ -759,6 +761,66 @@
 }
 
 
+
+/*
+ * Describe hit chance vs most recently recalled monster.
+ */
+static bool describe_hitchance(textblock *tb, const object_type *o_ptr,
+		player_state state, bitflag f[OF_SIZE], oinfo_detail_t mode)
+{
+	bool weapon = (wield_slot(o_ptr) == INVEN_WIELD);
+	bool have_knowledge = FALSE;
+	monster_lore *lore;
+	long chance = 0, chance2 = 0;
+	monster_race *race = p_ptr->monster_race;
+
+	if (!weapon)
+	{
+		return FALSE;	
+	}
+	
+	textblock_append(tb, "\n");
+	
+	if (race)
+	{
+		lore = get_lore(race);
+		if (know_armour(race, lore))
+		{
+			have_knowledge = TRUE;
+			
+			/* Player's chance to hit it */
+			chance = py_attack_hit_chance(o_ptr);
+
+			/* The following calculations are based on test_hit(); make sure to keep it in sync */
+			/* Avoid division by zero errors, and starting higher on the scale */
+			if (chance < 9)
+				chance = 9;
+
+			chance2 = 90 * (chance - (race->ac * 2 / 3)) / chance + 5;
+		
+			/* There is always a 12 percent chance to hit */
+			if (chance2 < 12) chance2 = 12;
+		
+			/* TODO: add better grammer */
+			textblock_append(tb, "Chance to hit ");
+			textblock_append(tb, race->name);
+			textblock_append(tb, ": ");
+			textblock_append_c(tb, TERM_L_BLUE, " %d", chance2);
+			textblock_append(tb, "%%");			
+		}
+	}
+		
+	if (!have_knowledge)
+	{
+		textblock_append_c(tb, TERM_L_DARK, "Use monster recall to select a known subject for a hit chance calculation.");
+	}
+	
+	textblock_append(tb, "\n");
+	
+	return TRUE;
+}
+
+
 /*
  * Describe combat advantages.
  */
@@ -829,6 +891,9 @@
 	/* Describe damage */
 	describe_damage(tb, o_ptr, state, f, mode);
 
+	/* Describe hitchance */
+	describe_hitchance(tb, o_ptr, state, f, mode);
+	
 	/* Note the impact flag */
 	if (of_has(f, OF_IMPACT))
 		textblock_append(tb, "Sometimes creates earthquakes on impact.\n");