diff --git a/src/day15.py b/src/day15.py
new file mode 100644
index 0000000..8c068e2
--- /dev/null
+++ b/src/day15.py
@@ -0,0 +1,92 @@
+from __future__ import annotations
+
+import math
+import re
+from dataclasses import dataclass
+from typing import Union
+
+from cpl_core.console import Console
+from cpl_core.utils import String
+from cpl_query.enumerable import Enumerable
+from cpl_query.extension import List
+from cpl_core.pipes import *
+
+from aoc.aoc import get_input
+
+# global vars
+day = 15
+aoc_input = get_input(2022, day)
+test_input = """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
+"""
+
+
+@dataclass
+class Position:
+    x: int
+    y: int
+
+    def manhattan_distance(self):
+        return abs(self.x) + abs(self.y)
+
+    def __sub__(self, other: Position):
+        x = self.x - other.x
+        y = self.y - other.y
+        return Position(x, y)
+
+
+def find_blocked_in_row(index: int, elements: List(tuple[Position, Position, Position])):
+    result = set()
+    for sensor, beacon, diff in elements:
+        dist = diff.manhattan_distance()
+        offset = abs(index - sensor.y)
+        if offset > dist:
+            continue
+
+        dx = dist - offset
+        t = list(range(sensor.x - dx, sensor.x + dx + 1))
+        if beacon.y == index and beacon.x in t:
+            t.remove(beacon.x)
+
+        result.update(set(t))
+
+    return result
+
+
+def parse(text: str) -> List[tuple[Position, Position, Position]]:
+    elements = List(tuple)
+    for line in text.splitlines():
+        found = re.findall(r'=-?\d+', line)
+        sensor = Position(int(found[0][1:]), int(found[1][1:]))
+        beacon = Position(int(found[2][1:]), int(found[3][1:]))
+        diff = sensor - beacon
+        elements.add((sensor, beacon, diff))
+
+    return elements
+
+
+def part1(text: str, index: int):
+    elements = parse(text)
+    result = find_blocked_in_row(index, elements)
+    Console.write_line(len(result))
+
+
+if __name__ == '__main__':
+    Console.write_line(f'Advent of code day {day}')
+    part1(test_input, 10)
+    part1(aoc_input, 2_000_000)
+    # part2(test_input, 20)
+    # part2(aoc_input, 4_000_000)
+    Console.write_line()