diff --git a/2/cubes.py b/2/cubes.py
new file mode 100644
index 0000000..c191abb
--- /dev/null
+++ b/2/cubes.py
@@ -0,0 +1,41 @@
+from aocd.models import Puzzle
+from aocd import submit
+
+def valid_games(games:list) -> list:
+    """
+    Solve part a.
+    - check which of the games are possible with the follwing limitations:
+        - 12 red
+        - 13 green
+        - 14 blue
+    - add up their IDs
+    """
+    rules = {"red":12, "green":13, "blue":14}
+
+    valid_ids = []
+    for i, game in enumerate(games.split("\n"), start=1):
+        throws = game.split(":")[1].split(";")
+        valid = True
+        for throw in throws:
+            cubes = throw.split(",")
+            for cube in cubes:
+                _, amount, color = cube.split(" ")
+                if int(amount) > rules[color]:
+                    valid = False
+        if valid:
+            valid_ids.append(i)
+    return valid_ids
+
+if __name__ == "__main__":
+    # get puzzle and parse data
+    puzzle = Puzzle(year=2023, day=2)
+
+    # part a:
+    answer_a = sum(valid_games(puzzle.input_data))
+    print(f"{answer_a}")
+    submit(answer_a, part="a", day=2, year=2023)
+
+    # part b:
+    #answer_b = 0
+    #print(f"{answer_b}")
+    #submit(answer_b, part="b", day=2, year=2023)