diff --git a/2022/15/part1.js b/2022/15/part1.js
new file mode 100644
index 0000000..64861c7
--- /dev/null
+++ b/2022/15/part1.js
@@ -0,0 +1,44 @@
+import * as R from "remeda";
+
+import { readFile } from "../05/part1.js";
+
+import V from '@yanick/vyktor';
+
+const readInput = (...args) =>
+    R.pipe(
+        readFile(...args),
+        (lines) => lines.split("\n"),
+        R.compact, // remove last line
+        R.map(line => line.match(/x=.*?y=\d+/g).map(str =>
+            str.match(/-?\d+/g).map(x => parseInt(x))).map(
+                coords => V(coords)
+            )
+        ));
+
+export const puzzleInput = readInput(import.meta.url, "input");
+export const sample = readInput(import.meta.url, "sample");
+
+export const unbeaconAtLine = targetLine => R.createPipe(
+    R.map( ([x,y]) => [ x, x.manhattanDistance(y) ] ),
+        R.filter(
+e => (
+            ( e[0].y - e[1] <= targetLine) &&
+            ( e[0].y + e[1] >= targetLine) 
+        ) 
+        ),
+        R.map(
+            e => {
+                const l = e[1] - Math.abs(targetLine - e[0].y);
+
+                return R.range(
+        e[0].x - l,
+        e[0].x + l,
+            ) }
+        ),
+        R.flatten,
+        R.uniq,
+                    x => x.length
+
+    );
+
+export default unbeaconAtLine(2000000);
diff --git a/2022/15/part2.js b/2022/15/part2.js
new file mode 100644
index 0000000..10fc179
--- /dev/null
+++ b/2022/15/part2.js
@@ -0,0 +1,4 @@
+import * as R from "remeda";
+
+
+export default () => {};
diff --git a/2022/15/sample b/2022/15/sample
new file mode 100644
index 0000000..a612424
--- /dev/null
+++ b/2022/15/sample
@@ -0,0 +1,14 @@
+Sensor at x=2, y=18: closest beacon is at x=-2, y=15
+Sensor at x=9, y=16: closest beacon is at x=10, y=16
+Sensor at x=13, y=2: closest beacon is at x=15, y=3
+Sensor at x=12, y=14: closest beacon is at x=10, y=16
+Sensor at x=10, y=20: closest beacon is at x=10, y=16
+Sensor at x=14, y=17: closest beacon is at x=10, y=16
+Sensor at x=8, y=7: closest beacon is at x=2, y=10
+Sensor at x=2, y=0: closest beacon is at x=2, y=10
+Sensor at x=0, y=11: closest beacon is at x=2, y=10
+Sensor at x=20, y=14: closest beacon is at x=25, y=17
+Sensor at x=17, y=20: closest beacon is at x=21, y=22
+Sensor at x=16, y=7: closest beacon is at x=15, y=3
+Sensor at x=14, y=3: closest beacon is at x=15, y=3
+Sensor at x=20, y=1: closest beacon is at x=15, y=3
diff --git a/2022/15/test.js b/2022/15/test.js
new file mode 100644
index 0000000..c843547
--- /dev/null
+++ b/2022/15/test.js
@@ -0,0 +1,25 @@
+import { test, expect, describe } from "vitest";
+
+import { expectSolution } from "../01/main.js";
+import part1, { sample, puzzleInput, unbeaconAtLine } from "./part1.js";
+import part2 from "./part2.js";
+
+describe("part 1", () => {
+    test('readInput', () => {
+        expect(sample[0][0].toArray()).toEqual([2, 18]);
+    });
+
+    test('sample', () => {
+        expect(unbeaconAtLine(10)(sample)).toEqual(26);
+    });
+
+    test("solution", () => {
+        expectSolution(part1(puzzleInput)).toEqual(5525990);
+    });
+});
+
+describe("part 2", () => {
+    test.todo("solution", () => {
+        expectSolution(part2(puzzleInput)).toEqual("TODO");
+    });
+});