From 8f432713888b89e8c37a635a312fc97e29268637 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ccxvii.net>
Date: Tue, 27 Sep 2022 18:47:45 +0200
Subject: Skip pursuit fire during rout if possible.

---
 rules.js | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/rules.js b/rules.js
index 6d53263..a712237 100644
--- a/rules.js
+++ b/rules.js
@@ -5252,19 +5252,37 @@ function fastest_undisrupted_friendly_unit_speed(where) {
 	return r
 }
 
+function has_hidden_friendly_unit(x) {
+	for (let u = first_friendly_unit; u <= last_friendly_unit; ++u)
+		if (unit_hex(u) === x && !set_has(game.revealed, u))
+			return true
+	return false
+}
+
 function goto_rout_fire(where) {
 	set_enemy_player()
 	game.hits = 0
 	game.pursuit = where
+	game.flash = ""
+
 	let slowest = slowest_enemy_unit_speed(game.pursuit)
+	let fastest = fastest_undisrupted_friendly_unit_speed(game.pursuit)
+
 	log(`Slowest was ${speed_name[slowest]} unit.`)
-	game.state = 'rout_fire'
+	if (slowest <= fastest || has_hidden_friendly_unit(game.pursuit)) {
+		game.state = 'rout_fire'
+	} else {
+		// too fast for pursuit fire, and we already know all the units involved
+		set_enemy_player()
+		end_rout_fire()
+	}
 }
 
 function goto_pursuit_fire_during_retreat(where) {
 	set_passive_player()
 	game.hits = 0
 	game.pursuit = where
+	game.flash = ""
 
 	let slowest = slowest_undisrupted_enemy_unit_speed(game.pursuit)
 	let fastest = fastest_undisrupted_friendly_unit_speed(game.pursuit)
-- 
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