Besiegers can't sea move away from besieged fortified port.

1 files changed, 5 insertions, 0 deletions

diff --git a/rules.js b/rules.js
index 0b68ade..e688381 100644
--- a/rules.js
+++ b/rules.js
@@ -798,6 +798,11 @@ function can_block_sea_move_to(who, to) {
 }
 
 function can_block_sea_move_from(who, from) {
+	if (from === TYRE || from === TRIPOLI) {
+		// besieged player controls port!
+		if (is_under_siege(from) && besieged_player(from) !== game.active)
+			return false
+	}
 	if (is_friendly_port(from))
 		return true
 	if (can_leave_besieged_port(from))