diff --git a/2023/day03.py b/2023/day03.py
new file mode 100644
index 0000000..afb710b
--- /dev/null
+++ b/2023/day03.py
@@ -0,0 +1,190 @@
+#!/usr/bin/env python3
+
+from typing import TextIO
+import re
+
+schematic: list[str] = []
+
+# line {int: {(a,b): num}, ...}
+gears: dict[int, dict[tuple[int, int], int]] = {}
+
+
+def get_adjacent(l: int, co: tuple[int, int]) -> bool:
+    for i in range(co[0], co[1]):
+        # check below
+        if (
+            l + 1 < len(schematic)
+            and not schematic[l + 1][i].isdigit()
+            and schematic[l + 1][i] != "."
+        ):
+            return True
+        # check above
+        if l != 0 and not schematic[l - 1][i].isdigit() and schematic[l - 1][i] != ".":
+            return True
+        # if first num check left
+        if (
+            i != 0
+            and i == co[0]
+            and not schematic[l][i - 1].isdigit()
+            and schematic[l][i - 1] != "."
+        ):
+            return True
+        # if last num check right
+        if (
+            i + 1 < len(schematic[l])
+            and i == co[1] - 1
+            and not schematic[l][i + 1].isdigit()
+            and schematic[l][i + 1] != "."
+        ):
+            return True
+        # all check diag
+        # U L
+        if (
+            l != 0
+            and i != 0
+            and not schematic[l - 1][i - 1].isdigit()
+            and schematic[l - 1][i - 1] != "."
+        ):
+            return True
+        # U R
+        if (
+            l != 0
+            and i + 1 < len(schematic[l])
+            and not schematic[l - 1][i + 1].isdigit()
+            and schematic[l - 1][i + 1] != "."
+        ):
+            return True
+        # D L
+        if (
+            l + 1 < len(schematic)
+            and i != 0
+            and not schematic[l + 1][i - 1].isdigit()
+            and schematic[l + 1][i - 1] != "."
+        ):
+            return True
+        # D R
+        if (
+            l + 1 < len(schematic)
+            and i + 1 < len(schematic[l])
+            and not schematic[l + 1][i + 1].isdigit()
+            and schematic[l + 1][i + 1] != "."
+        ):
+            return True
+    return False
+
+
+def part1(file: TextIO) -> int:
+    sum_: int = 0
+
+    for line in file:
+        schematic.append(line.strip())
+
+    for l in range(len(schematic)):
+        nums = re.finditer(r"\d+", schematic[l])
+
+        for n in nums:
+            if l in gears:
+                gears[l][n.span()] = int(n.group(0))
+            else:
+                gears[l] = {n.span(): int(n.group(0))}
+
+            if get_adjacent(l, n.span()):
+                sum_ += int(n.group(0))
+
+    return sum_
+
+
+def find_num(l, c) -> tuple[int, tuple[int, int, int]]:
+    for coord in gears[l]:
+        if c in range(coord[0], coord[1] + 1):
+            return (
+                gears[l][coord],
+                (l, coord[0], coord[1]),
+            )  # line pos (same coordinates on 2 diff lines)
+
+    raise ValueError
+
+
+def part2() -> int:
+    ratios: int = 0
+
+    for l in range(len(schematic)):
+        for c in range(len(schematic[l])):
+            if schematic[l][c] == "*":
+                nums: list[int] = []
+                used_c: list[tuple[int, int, int]] = []
+                # start parsing for digits
+                # check below
+                if l + 1 < len(schematic) and schematic[l + 1][c].isdigit():
+                    a = find_num(l + 1, c)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+                # check above
+                if l != 0 and schematic[l - 1][c].isdigit():
+                    a = find_num(l - 1, c)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+                # check left
+                if c != 0 and schematic[l][c - 1].isdigit():
+                    a = find_num(l, c - 1)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+                # check right
+                if c + 1 < len(schematic[l]) and schematic[l][c + 1].isdigit():
+                    a = find_num(l, c + 1)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+                # all check diag
+                # U L
+                if l != 0 and c != 0 and schematic[l - 1][c - 1].isdigit():
+                    a = find_num(l - 1, c - 1)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+                # U R
+                if (
+                    l != 0
+                    and c + 1 < len(schematic[l])
+                    and schematic[l - 1][c + 1].isdigit()
+                ):
+                    a = find_num(l - 1, c + 1)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+                # D L
+                if (
+                    l + 1 < len(schematic)
+                    and c != 0
+                    and schematic[l + 1][c - 1].isdigit()
+                ):
+                    a = find_num(l + 1, c - 1)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+                # D R
+                if (
+                    l + 1 < len(schematic)
+                    and c + 1 < len(schematic[l])
+                    and schematic[l + 1][c + 1].isdigit()
+                ):
+                    a = find_num(l + 1, c + 1)
+                    if a[1] not in used_c:
+                        nums.append(a[0])
+                        used_c.append(a[1])
+
+                if len(nums) == 2:
+                    ratios += nums[0] * nums[1]
+                if len(nums) > 2:
+                    raise ValueError
+
+    return ratios
+
+
+if __name__ == "__main__":
+    with open("day03.txt") as f:
+        print(part1(f))
+    print(part2())  # not 75089990 too low
diff --git a/2023/day03_test.py b/2023/day03_test.py
new file mode 100644
index 0000000..354166c
--- /dev/null
+++ b/2023/day03_test.py
@@ -0,0 +1,10 @@
+from day03 import *
+
+
+def test_part1() -> None:
+    with open("day03.txt") as f:
+        assert part1(f) == 546312
+
+
+def test_part2() -> None:
+    assert part2() == 87449461