diff --git a/03.bowling/y-bowling.rb b/03.bowling/y-bowling.rb
new file mode 100755
index 0000000000..0a8f20a437
--- /dev/null
+++ b/03.bowling/y-bowling.rb
@@ -0,0 +1,35 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+scores = ARGV[0].split(',')
+shots = []
+
+scores.each do |s|
+  shots << (s == 'X' ? 10 : s.to_i)
+  shots << 0 if shots.length < 18 && s == 'X'
+end
+
+frames = shots.each_slice(2).to_a
+
+frames[9] += frames.pop if frames.length == 11
+point = frames.each_with_index.sum do |frame, i|
+  next_frame = frames[i + 1]
+  not_last_frame = i != 9
+  strilke = frame[0] == 10
+  spare = frame.sum == 10
+
+  if not_last_frame && strilke
+    if next_frame.length == 3
+      10 + next_frame[0..1].sum
+    elsif next_frame[0] == 10
+      10 + 10 + frames[i + 2][0]
+    else
+      10 + next_frame.sum
+    end
+  elsif not_last_frame && spare
+    frame.sum + next_frame[0]
+  else
+    frame.sum
+  end
+end
+puts point