diff --git a/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/AdventOfCode2023.FSharp.Lib.fsproj b/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/AdventOfCode2023.FSharp.Lib.fsproj
index d989f2b..a760c72 100644
--- a/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/AdventOfCode2023.FSharp.Lib.fsproj
+++ b/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/AdventOfCode2023.FSharp.Lib.fsproj
@@ -13,6 +13,7 @@
         <Compile Include="Day3.fs" />
         <Compile Include="Day4.fs" />
         <Compile Include="Day5.fs" />
+        <Compile Include="Day6.fs" />
     </ItemGroup>
 
 </Project>
diff --git a/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/Day6.fs b/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/Day6.fs
new file mode 100644
index 0000000..4021732
--- /dev/null
+++ b/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/Day6.fs
@@ -0,0 +1,14 @@
+namespace AdventOfCode2023
+
+open System
+
+[<RequireQualifiedAccess>]
+module Day6 =
+
+    let part1 (s : string) =
+        use mutable lines = StringSplitEnumerator.make '\n' s
+        -1
+
+    let part2 (s : string) =
+        use mutable lines = StringSplitEnumerator.make '\n' s
+        -1
diff --git a/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp/Program.fs b/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp/Program.fs
index 94fa667..debee23 100644
--- a/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp/Program.fs
+++ b/AdventOfCode2023.FSharp/AdventOfCode2023.FSharp/Program.fs
@@ -121,6 +121,21 @@ module Program =
             Console.WriteLine (part2.ToString ())
             Console.Error.WriteLine ((1_000.0 * float sw.ElapsedTicks / float Stopwatch.Frequency).ToString () + "ms")
 
+        printfn "=====Day 6====="
+
+        do
+            let input = Path.Combine (dir.FullName, "day6.txt") |> File.ReadAllText
+            sw.Restart ()
+            let part1 = Day6.part1 input
+            sw.Stop ()
+            Console.WriteLine (part1.ToString ())
+            Console.Error.WriteLine ((1_000.0 * float sw.ElapsedTicks / float Stopwatch.Frequency).ToString () + "ms")
+            sw.Restart ()
+            let part2 = Day6.part2 input
+            sw.Stop ()
+            Console.WriteLine (part2.ToString ())
+            Console.Error.WriteLine ((1_000.0 * float sw.ElapsedTicks / float Stopwatch.Frequency).ToString () + "ms")
+
         endToEnd.Stop ()
 
         Console.Error.WriteLine (
diff --git a/AdventOfCode2023.FSharp/Test/Test.fsproj b/AdventOfCode2023.FSharp/Test/Test.fsproj
index aa21125..e7a0f34 100644
--- a/AdventOfCode2023.FSharp/Test/Test.fsproj
+++ b/AdventOfCode2023.FSharp/Test/Test.fsproj
@@ -14,12 +14,14 @@
         <Compile Include="TestDay3.fs" />
         <Compile Include="TestDay4.fs" />
         <Compile Include="TestDay5.fs" />
+        <Compile Include="TestDay6.fs" />
         <EmbeddedResource Include="samples\day1.txt" />
         <EmbeddedResource Include="samples\day1part1.txt" />
         <EmbeddedResource Include="samples\day2.txt" />
         <EmbeddedResource Include="samples\day3.txt" />
         <EmbeddedResource Include="samples\day4.txt" />
         <EmbeddedResource Include="samples\day5.txt" />
+        <EmbeddedResource Include="samples\day6.txt" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/AdventOfCode2023.FSharp/Test/TestDay6.fs b/AdventOfCode2023.FSharp/Test/TestDay6.fs
new file mode 100644
index 0000000..2848b73
--- /dev/null
+++ b/AdventOfCode2023.FSharp/Test/TestDay6.fs
@@ -0,0 +1,46 @@
+namespace AdventOfCode2023.Test
+
+open System
+open AdventOfCode2023
+open NUnit.Framework
+open FsUnitTyped
+open System.IO
+
+[<TestFixture>]
+module TestDay6 =
+
+    let sample = Assembly.getEmbeddedResource typeof<Dummy>.Assembly "day6.txt"
+
+    [<Test>]
+    let part1Sample () =
+        sample |> Day6.part1 |> shouldEqual 0
+
+    [<Test>]
+    let part2Sample () =
+        sample |> Day6.part2 |> shouldEqual 0
+
+    [<Test>]
+    let part1Actual () =
+        let s =
+            try
+                File.ReadAllText (Path.Combine (__SOURCE_DIRECTORY__, "../../inputs/day6.txt"))
+            with
+            | :? DirectoryNotFoundException
+            | :? FileNotFoundException ->
+                Assert.Inconclusive ()
+                failwith "unreachable"
+
+        Day6.part1 s |> shouldEqual 0
+
+    [<Test>]
+    let part2Actual () =
+        let s =
+            try
+                File.ReadAllText (Path.Combine (__SOURCE_DIRECTORY__, "../../inputs/day6.txt"))
+            with
+            | :? DirectoryNotFoundException
+            | :? FileNotFoundException ->
+                Assert.Inconclusive ()
+                failwith "unreachable"
+
+        Day6.part2 s |> shouldEqual 0
diff --git a/AdventOfCode2023.FSharp/Test/samples/day6.txt b/AdventOfCode2023.FSharp/Test/samples/day6.txt
new file mode 100644
index 0000000..f756727
--- /dev/null
+++ b/AdventOfCode2023.FSharp/Test/samples/day6.txt
@@ -0,0 +1,33 @@
+seeds: 79 14 55 13
+
+seed-to-soil map:
+50 98 2
+52 50 48
+
+soil-to-fertilizer map:
+0 15 37
+37 52 2
+39 0 15
+
+fertilizer-to-water map:
+49 53 8
+0 11 42
+42 0 7
+57 7 4
+
+water-to-light map:
+88 18 7
+18 25 70
+
+light-to-temperature map:
+45 77 23
+81 45 19
+68 64 13
+
+temperature-to-humidity map:
+0 69 1
+1 0 69
+
+humidity-to-location map:
+60 56 37
+56 93 4