The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
ASCII Table in Go in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 1st Steffan153 🇫🇮 1,000 154 286ms 12 Mar 2024 1st JayXon 🇺🇸 1,000 154 292ms 12 Mar 2024 1st edsrzf 🇳🇿 1,000 154 282ms 5 Mar 2025 1st sean-niemann 🇺🇸 1,000 154 306ms 11 Apr 2025 5th nwellnhof 🇩🇪 994 155 261ms 16 Jul 2022 5th targrik 994 155 284ms 1 Jul 2025 7th MeWhenI 🇻🇦 975 158 279ms 10 Feb 2023 7th KasperKivimaeki 🇫🇮 975 158 266ms 8 Oct 2025 9th HahUK 969 159 287ms 10 Nov 2025 10th kkoenig 957 161 292ms 1 Jan 2024 11th jupj 🇫🇮 951 162 282ms 12 Aug 2022 11th emplv 🇱🇻 951 162 273ms 3 Oct 2023 13th ibeucaly 895 172 288ms 9 May 2025 14th stefangimmillaro 890 173 281ms 6 Sep 2023 15th imperfect-fourth 875 176 293ms 5 hours ago 16th albanian-laundromat 860 179 286ms 8 Dec 2025 17th CaedenHarper 🇨🇦 846 182 297ms 4 Nov 2025 18th Yewzir 🇧🇪 828 186 302ms 7 Feb 2024 19th martin-viggiano 824 187 285ms 22 Jun 2022 19th MCausc78 🇺🇦 824 187 326ms 30 Dec 2022 21st Shanethegamer 🇺🇸 806 191 290ms 7 Feb 2024 22nd snoozingnewt 🇨🇦 794 194 294ms 2 Nov 2025 23rd msbranicky 782 197 301ms 24 Aug 2023 24th destofr 774 199 359ms 23 Aug 2022 25th jerrandolph 755 204 318ms 20 Oct 2023 26th harshit54 748 206 281ms 3 Oct 2023 27th kimbo 🇺🇸 730 211 294ms 28 Dec 2022 28th hotmanga 713 216 285ms 25 Oct 2023 29th xbxbxb007 703 219 275ms 10 Jan 2024 30th MikeColes 700 220 291ms 10 Aug 2022 31st HassanAliKadhem 🇧🇭 675 228 361ms 3 Aug 2023 32nd ereztaiar 🇮🇱 502 307 275ms 18 May 2025 33rd KatieLG 🇬🇧 474 325 274ms 9 Apr 2022 33rd JRaspass 🇬🇧 474 325 283ms 9 Apr 2022 33rd dokutan 474 325 320ms 8 Mar 2024 33rd HumanoidCPU 474 325 274ms 26 Aug 2024 37th RutZap 472 326 286ms 24 Jan 2023 38th KatieLG-Transpiler 🇬🇧 471 327 280ms 24 Jun 2022 39th mpldr 🇩🇪 468 329 302ms 2 Nov 2023 40th retrohun 449 343 295ms 27 Dec 2022 40th Mabeloid 🇳🇴 449 343 264ms 17 Sep 2024 42nd jhpaques 🇫🇷 444 347 331ms 16 Dec 2022 43rd jaxmattfair 🇺🇸 435 354 285ms 14 Jan 2023 44th eli-siegel 252 612 293ms 21 Jun 2023 1–44 of 44
