diff --git a/day20/sol.tcl b/day20/sol.tcl
index 012b8c9..f6d61a5 100755
--- a/day20/sol.tcl
+++ b/day20/sol.tcl
@@ -63,6 +63,10 @@ proc pulse {init {debug 0}} {
         set pulses {}
         foreach {from n value} $copy {
             incr count($value)
+            if {$n eq "rx" && $value == 0} {
+                global solved
+                set solved 1
+            }
             switch $type($n) {
                 flip {
                     if {$value == 0} {
@@ -106,11 +110,29 @@ proc solve input {
     set solved 0
     for {set i 1} {$i <= 1000} {incr i} {
         pulse broadcaster
+        if {$solved} {
+            puts "rx $i"
+        }
     }
 
     puts "$count(0)"
     puts $count(1)
     puts [expr {$count(0) * $count(1)}]
+
+    global type
+    if {![info exists type(rx)]} return
+
+    while {!$solved} {
+        pulse broadcaster
+        incr i
+        if {$solved} {
+            puts "rx $i"
+            break
+        }
+        if {$i % 1000 == 0} {
+            puts "\[$i\]"
+        }
+    }
 }
 
 solve stdin