diff --git a/ruby/2013-detect-squares.rb b/ruby/2013-detect-squares.rb
new file mode 100644
index 000000000..ac390954b
--- /dev/null
+++ b/ruby/2013-detect-squares.rb
@@ -0,0 +1,28 @@
+class DetectSquares
+    def initialize()
+        @points_count = Hash.new(0)
+        @points = []   
+    end
+
+
+    def add(point)
+        @points_count[point] +=1
+        @points.append(point)
+    end
+
+    def count(point)
+        result = 0
+        px = point[0]
+        py = point[1]
+
+        @points.each do |p|
+            next if (((py-p[1]).abs != (px-p[0]).abs) || (p[0]==px) ||(p[1]==py))
+            result += @points_count[[p[0],py]] * @points_count[[px,p[1]]]
+        end
+
+        return result
+        
+    end
+
+
+end
\ No newline at end of file