diff --git a/2023/day06/deno.lock b/2023/day06/deno.lock
new file mode 100644
index 0000000..2c1d001
--- /dev/null
+++ b/2023/day06/deno.lock
@@ -0,0 +1,37 @@
+{
+  "version": "3",
+  "remote": {
+    "https://deno.land/std@0.208.0/assert/_constants.ts": "8a9da298c26750b28b326b297316cdde860bc237533b07e1337c021379e6b2a9",
+    "https://deno.land/std@0.208.0/assert/_diff.ts": "58e1461cc61d8eb1eacbf2a010932bf6a05b79344b02ca38095f9b805795dc48",
+    "https://deno.land/std@0.208.0/assert/_format.ts": "a69126e8a469009adf4cf2a50af889aca364c349797e63174884a52ff75cf4c7",
+    "https://deno.land/std@0.208.0/assert/assert.ts": "9a97dad6d98c238938e7540736b826440ad8c1c1e54430ca4c4e623e585607ee",
+    "https://deno.land/std@0.208.0/assert/assert_almost_equals.ts": "e15ca1f34d0d5e0afae63b3f5d975cbd18335a132e42b0c747d282f62ad2cd6c",
+    "https://deno.land/std@0.208.0/assert/assert_array_includes.ts": "6856d7f2c3544bc6e62fb4646dfefa3d1df5ff14744d1bca19f0cbaf3b0d66c9",
+    "https://deno.land/std@0.208.0/assert/assert_equals.ts": "d8ec8a22447fbaf2fc9d7c3ed2e66790fdb74beae3e482855d75782218d68227",
+    "https://deno.land/std@0.208.0/assert/assert_exists.ts": "407cb6b9fb23a835cd8d5ad804e2e2edbbbf3870e322d53f79e1c7a512e2efd7",
+    "https://deno.land/std@0.208.0/assert/assert_false.ts": "0ccbcaae910f52c857192ff16ea08bda40fdc79de80846c206bfc061e8c851c6",
+    "https://deno.land/std@0.208.0/assert/assert_greater.ts": "ae2158a2d19313bf675bf7251d31c6dc52973edb12ac64ac8fc7064152af3e63",
+    "https://deno.land/std@0.208.0/assert/assert_greater_or_equal.ts": "1439da5ebbe20855446cac50097ac78b9742abe8e9a43e7de1ce1426d556e89c",
+    "https://deno.land/std@0.208.0/assert/assert_instance_of.ts": "3aedb3d8186e120812d2b3a5dea66a6e42bf8c57a8bd927645770bd21eea554c",
+    "https://deno.land/std@0.208.0/assert/assert_is_error.ts": "c21113094a51a296ffaf036767d616a78a2ae5f9f7bbd464cd0197476498b94b",
+    "https://deno.land/std@0.208.0/assert/assert_less.ts": "aec695db57db42ec3e2b62e97e1e93db0063f5a6ec133326cc290ff4b71b47e4",
+    "https://deno.land/std@0.208.0/assert/assert_less_or_equal.ts": "5fa8b6a3ffa20fd0a05032fe7257bf985d207b85685fdbcd23651b70f928c848",
+    "https://deno.land/std@0.208.0/assert/assert_match.ts": "c4083f80600bc190309903c95e397a7c9257ff8b5ae5c7ef91e834704e672e9b",
+    "https://deno.land/std@0.208.0/assert/assert_not_equals.ts": "9f1acab95bd1f5fc9a1b17b8027d894509a745d91bac1718fdab51dc76831754",
+    "https://deno.land/std@0.208.0/assert/assert_not_instance_of.ts": "0c14d3dfd9ab7a5276ed8ed0b18c703d79a3d106102077ec437bfe7ed912bd22",
+    "https://deno.land/std@0.208.0/assert/assert_not_match.ts": "3796a5b0c57a1ce6c1c57883dd4286be13a26f715ea662318ab43a8491a13ab0",
+    "https://deno.land/std@0.208.0/assert/assert_not_strict_equals.ts": "4cdef83df17488df555c8aac1f7f5ec2b84ad161b6d0645ccdbcc17654e80c99",
+    "https://deno.land/std@0.208.0/assert/assert_object_match.ts": "d8fc2867cfd92eeacf9cea621e10336b666de1874a6767b5ec48988838370b54",
+    "https://deno.land/std@0.208.0/assert/assert_rejects.ts": "45c59724de2701e3b1f67c391d6c71c392363635aad3f68a1b3408f9efca0057",
+    "https://deno.land/std@0.208.0/assert/assert_strict_equals.ts": "b1f538a7ea5f8348aeca261d4f9ca603127c665e0f2bbfeb91fa272787c87265",
+    "https://deno.land/std@0.208.0/assert/assert_string_includes.ts": "b821d39ebf5cb0200a348863c86d8c4c4b398e02012ce74ad15666fc4b631b0c",
+    "https://deno.land/std@0.208.0/assert/assert_throws.ts": "63784e951475cb7bdfd59878cd25a0931e18f6dc32a6077c454b2cd94f4f4bcd",
+    "https://deno.land/std@0.208.0/assert/assertion_error.ts": "4d0bde9b374dfbcbe8ac23f54f567b77024fb67dbb1906a852d67fe050d42f56",
+    "https://deno.land/std@0.208.0/assert/equal.ts": "9f1a46d5993966d2596c44e5858eec821859b45f783a5ee2f7a695dfc12d8ece",
+    "https://deno.land/std@0.208.0/assert/fail.ts": "c36353d7ae6e1f7933d45f8ea51e358c8c4b67d7e7502028598fe1fea062e278",
+    "https://deno.land/std@0.208.0/assert/mod.ts": "37c49a26aae2b254bbe25723434dc28cd7532e444cf0b481a97c045d110ec085",
+    "https://deno.land/std@0.208.0/assert/unimplemented.ts": "d56fbeecb1f108331a380f72e3e010a1f161baa6956fd0f7cf3e095ae1a4c75a",
+    "https://deno.land/std@0.208.0/assert/unreachable.ts": "4600dc0baf7d9c15a7f7d234f00c23bca8f3eba8b140286aaca7aa998cf9a536",
+    "https://deno.land/std@0.208.0/fmt/colors.ts": "34b3f77432925eb72cf0bfb351616949746768620b8e5ead66da532f93d10ba2"
+  }
+}
diff --git a/2023/day06/part1.ts b/2023/day06/part1.ts
index 5658bc9..24cfca4 100644
--- a/2023/day06/part1.ts
+++ b/2023/day06/part1.ts
@@ -1,3 +1,5 @@
+import { assert } from "https://deno.land/std@0.208.0/assert/assert.ts";
+
 if (import.meta.main) {
   const input = (
     await Deno.readFile("input").then((bytes) =>
@@ -8,6 +10,33 @@ if (import.meta.main) {
 }
 
 export function answer(input: string): number {
-  console.log(input);
-  return 42;
+  const [raceDurations, records] = input.split("\n").map((l) => {
+    return l
+      .split(/\s+/)
+      .slice(1)
+      .map((x) => parseInt(x));
+  });
+
+  let errorMargin = 1;
+  for (let i = 0; i < raceDurations.length; i++) {
+    const [min, max] = minMaxHoldsToWin(raceDurations[i], records[i]);
+    errorMargin *= max - min + 1;
+  }
+
+  return errorMargin;
+}
+
+function minMaxHoldsToWin(
+  raceDuration: number,
+  record: number,
+): [number, number] {
+  let min = 0;
+  let max = 0;
+  for (let hold = 0; hold < raceDuration; hold++) {
+    const distance = hold * (raceDuration - hold);
+    if (min === 0 && distance > record) min = hold;
+    if (min !== 0 && distance > record) max = hold;
+    if (min !== 0 && max !== 0 && distance < record) break;
+  }
+  return [min, max];
 }
diff --git a/2023/day06/test.ts b/2023/day06/test.ts
index ef5e047..8454d0a 100644
--- a/2023/day06/test.ts
+++ b/2023/day06/test.ts
@@ -3,8 +3,10 @@ import * as p1 from "./part1.ts";
 import * as p2 from "./part2.ts";
 
 Deno.test("part1", () => {
-  const examples = ["abc", "def"].join("\n");
-  assertEquals(p1.answer(examples), 42);
+  const examples = ["Time:      7  15   30", "Distance:  9  40  200"].join(
+    "\n",
+  );
+  assertEquals(p1.answer(examples), 288);
 });
 
 Deno.test("part2", () => {