The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Foo Fizz Buzz Bar in Rust in bytes. 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 Bytes Time Submitted 1st acotis 1,000 129 175ms 14 Oct 2025 1st JayXon 🇺🇸 1,000 129 172ms 15 Oct 2025 1st kumavale 1,000 129 169ms 16 Oct 2025 4th andersk 🇺🇸 935 138 144ms 7 Nov 2022 5th Natanaelel 🇸🇪 884 146 172ms 26 Jul 2025 6th lynn 878 147 162ms 7 Jul 2024 7th SirBogman 🇺🇸 872 148 135ms 4 Oct 2023 7th stefangimmillaro 872 148 126ms 19 Oct 2023 7th emgordon154 872 148 193ms 26 Feb 2025 10th fantaize 838 154 134ms 17 days ago 11th akusumoto 🇯🇵 822 157 148ms 20 Apr 2022 12th btjones0 806 160 151ms 19 Jun 2022 12th elgan65536 🇺🇸 806 160 127ms 7 Feb 2026 14th xyangst 787 164 155ms 3 Oct 2024 15th ovs-code 🇩🇪 777 166 165ms 23 Apr 2025 16th kgodara 768 168 152ms 16 Mar 2023 17th jared-hughes 763 169 150ms 10 Nov 2022 18th luuumine 🇫🇷 754 171 152ms 15 Nov 2025 19th Awsute 746 173 151ms 16 Feb 2022 19th ian-h-chamberlain 🇺🇸 746 173 134ms 28 Jun 2022 19th msbranicky 746 173 130ms 6 Oct 2023 22nd sona-tau 733 176 150ms 10 Mar 2023 23rd Yewzir 🇧🇪 729 177 120ms 7 Feb 2024 24th CarsonChr 🇺🇸 725 178 142ms 14 Jan 2024 25th edsrzf 🇳🇿 721 179 142ms 22 Nov 2024 26th raketexyz 717 180 154ms 18 Dec 2021 26th verticallity 717 180 165ms 6 Apr 2022 28th Logicless-Coder 705 183 126ms 19 Mar 2023 29th ArmaanAS 701 184 155ms 27 Nov 2021 30th JGDoerrer 694 186 136ms 11 Jan 2022 31st janbehrens 🇩🇪 686 188 139ms 23 Nov 2021 31st Arkadios200 686 188 180ms 11 Oct 2025 33rd Shanethegamer 🇺🇸 683 189 126ms 24 Jan 2023 34th dokutan 679 190 129ms 30 Jul 2024 35th Pena86 675 191 140ms 25 Dec 2021 36th ZachClayburn 668 193 161ms 26 Jul 2022 37th jhpaques 🇫🇷 662 195 130ms 30 Nov 2022 38th Ernest1338 658 196 125ms 20 Feb 2022 39th snoozingnewt 🇨🇦 639 202 125ms 6 Nov 2025 40th Siri-chan 635 203 129ms 29 Dec 2022 41st JustJakeee 632 204 146ms 18 May 2022 41st TannerJ07 🇺🇸 632 204 125ms 5 Apr 2025 43rd kitzurea 620 208 130ms 29 Dec 2025 44th Trusly 614 210 159ms 26 Feb 2024 45th Aurel300 🇨🇭 611 211 131ms 5 Jun 2024 46th Florian-Mt 600 215 200ms 22 Jul 2024 47th WatMan77 594 217 131ms 9 May 2024 48th Jaymesv2 578 223 128ms 24 Nov 2021 48th Posandu 578 223 165ms 11 Sep 2022 50th MeWhenI 🇻🇦 556 232 131ms 22 Nov 2021 51st shibacho 🇯🇵 551 234 163ms 3 Aug 2022 52nd lordclips 518 249 165ms 9 Mar 2024 53rd HazeSystem 416 310 152ms 18 Jan 2023 54th ir3456 385 335 155ms 8 Sep 2023 55th 53hornet 379 340 137ms 6 Jul 2022 56th christensendaniel 278 464 149ms 14 May 2024 57th JackieAlacrity2373 275 469 148ms 11 Jun 2024 58th TheMadRey 237 545 122ms 3 Mar 2024 59th Jo0n4s 176 731 130ms 28 Feb 2024 60th KatieLG 🇬🇧 84 1,532 274ms 30 Nov 2025 61st retrohun 22 5,739 109ms 27 Dec 2022 61st HumanoidCPU 22 5,739 111ms 11 May 2024 61st Mabeloid 🇳🇴 22 5,739 121ms 18 Sep 2024 61st CaedenHarper 🇨🇦 22 5,739 114ms 16 Aug 2025 65th KatieLG-Transpiler 🇬🇧 19 6,741 112ms 24 Jun 2022 1–65 of 65
