diff --git a/katas/closed-circuit/closed-circuit.js b/katas/closed-circuit/closed-circuit.js
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+++ b/katas/closed-circuit/closed-circuit.js
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+function isCircuitClosed (matrix) {
+    // YOUR SOLUTION GOES HERE
+};
diff --git a/katas/closed-circuit/closed-circuit_test.js b/katas/closed-circuit/closed-circuit_test.js
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+describe('isCircuitClosed function', function() {
+    let area = [[0,0,0,1,1,0,0,0],
+                [0,0,0,1,0,1,0,0],
+                [0,0,0,1,0,1,0,0],
+                [0,0,0,0,0,0,0,0]];
+
+    it('should return false if circuit is\'nt closed', function() {
+        expect(isCircuitClosed(area)).toBe(false);
+    });
+
+    it('should return true if circuit closed', function() {
+        area[2][4] = 1;
+        
+        expect(isCircuitClosed(area)).toBe(true);
+    });
+
+    it('should return false if only one link in circuit', function() {
+        area = [[0,0,0],
+                [0,1,0],
+                [0,0,0]];
+
+        expect(isCircuitClosed(area)).toBe(false);
+    });
+});
diff --git a/katas/closed-circuit/readme.md b/katas/closed-circuit/readme.md
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+# Task
+Create a function that check closed or nor circuit in provided 'area'.
+Provided 'area' - Martix (n*m) that must contain only 0 and 1 (0 - empty, 1 - circuit link).
+Links(1) can connect diagonally (45 degrees).
+
+## Important note
+Сircuit will be closed if circuit links form a closed area.
+One circuit link(1) isn't closed circuit!
+
+## Example
+
+```js
+let area = [[0,0,0,1,1,0,0,0],
+            [0,0,0,1,0,1,0,0],
+            [0,0,0,1,0,1,0,0],
+            [0,0,0,0,0,0,0,0]];
+
+isCircuitClosed(area); // false
+area[2][4] = 1
+isCircuitClosed(area); // true
+```
+
+## Arguments
+ ! Only matrix (n*m) !
+
+See tests in [closed-circuit_test.js](https://github.com/AlexVvx/code-wars/blob/master/katas/closed-circuit/closed-circuit_test.js)
+
+## Boilerplate
+```js
+function isCircuitClosed (matrix) {
+    // YOUR SOLUTION GOES HERE
+};
+```