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?
Fizz Buzz in all languages 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 504th mdezh 979 56 5ms 7 Oct 2024 504th interso 979 56 5ms 7 Oct 2024 504th smelesh 979 56 5ms 7 Oct 2024 504th yzen-dev 979 56 5ms 8 Oct 2024 504th targrik 979 56 6ms 10 Oct 2024 504th fibbonacci 979 56 4ms 10 Oct 2024 504th CaedenHarper 🇨🇦 979 56 5ms 22 Oct 2024 504th Juliaaan1 979 56 5ms 1 Nov 2024 504th luzrain 979 56 5ms 1 Nov 2024 504th facek1ck 979 56 5ms 5 Nov 2024 504th sedlacek-martin 979 56 5ms 5 Nov 2024 504th MoritzBoeckelmann 979 56 5ms 7 Nov 2024 504th visor 🇷🇺 979 56 4ms 6 Jan 2025 504th MeWhenI 🇻🇦 979 56 5ms 13 Mar 2025 504th aloskutov 🇷🇺 979 56 5ms 20 Jul 2025 504th BREMAUCY 🇫🇷 979 56 5ms 25 Jul 2025 504th snoozingnewt 🇨🇦 979 56 5ms 4 Oct 2025 504th duckyluuk 🇳🇱 979 56 5ms 11 Nov 2025 504th TomvdPeet 979 56 5ms 3 Dec 2025 504th CornerMercury 🇬🇧 979 56 5ms 7 Dec 2025 504th KasperKivimaeki 🇫🇮 979 56 5ms 9 Dec 2025 582nd fuzzylojik-golf 🇺🇸 977 74 412ms 27 May 2025 582nd AdrienHache 🇫🇷 977 74 433ms 14 Aug 2025 584th edsrzf 🇳🇿 976 89 393ms 26 Sep 2025 584th DialFrost 🇸🇬 976 89 521ms 26 Sep 2025 584th sean-niemann 🇺🇸 976 89 462ms 26 Sep 2025 584th JayXon 🇺🇸 976 89 489ms 26 Sep 2025 584th pardouin 🇫🇷 976 89 474ms 26 Sep 2025 584th fuzzylojik-golf 🇺🇸 976 89 474ms 26 Sep 2025 584th namelessiw 976 89 417ms 29 Sep 2025 584th Yewzir 🇧🇪 976 89 376ms 2 Oct 2025 584th Yax42 🇫🇷 976 89 513ms 3 Oct 2025 584th Phuitric 976 89 490ms 3 Oct 2025 584th b-illy 🇬🇧 976 89 474ms 3 Oct 2025 584th ovs-code 🇩🇪 976 89 499ms 3 Oct 2025 584th CaedenHarper 🇨🇦 976 89 507ms 3 Oct 2025 584th snoozingnewt 🇨🇦 976 89 470ms 3 Oct 2025 584th m-tkach 🇺🇦 976 89 520ms 3 Oct 2025 584th stefangimmillaro 976 89 466ms 6 Oct 2025 584th ItsMeNoobieboy 976 89 485ms 21 Oct 2025 584th Jacob385 976 89 488ms 27 Oct 2025 584th kmathis22 976 89 471ms 28 Oct 2025 584th Nyfii 976 89 513ms 28 Oct 2025 584th squid233 976 89 461ms 7 Nov 2025 584th HumanoidCPU 976 89 504ms 8 Nov 2025 584th sisyphus-ppcg 🇦🇺 976 89 387ms 25 Nov 2025 584th ScottHamper 976 89 473ms 30 Nov 2025 584th KasperKivimaeki 🇫🇮 976 89 489ms 2 Dec 2025 584th Lydxn 🇨🇦 976 89 435ms 12 Dec 2025 584th emgordon154 976 89 362ms 9 Feb 2026 584th Steffan153 🇫🇮 976 89 388ms 12 Feb 2026 584th RobertHoeh 976 89 365ms 23 days ago 613th prplz 🇦🇺 974 54 10ms 19 Oct 2019 613th hallvabo 🇳🇴 974 54 10ms 21 Sep 2020 613th TFeld00 🇩🇰 974 54 10ms 4 Nov 2020 613th m-tkach 🇺🇦 974 54 10ms 25 May 2021 613th SirBogman 🇺🇸 974 54 10ms 5 Jan 2023 613th DialFrost 🇸🇬 974 54 11ms 6 Jan 2023 613th neel11235813 974 54 11ms 3 Feb 2023 613th crispshaker 974 54 9ms 25 May 2023 613th ndren 974 54 11ms 28 Aug 2023 613th Rubiksmath 974 54 10ms 12 Sep 2023 613th Seek64 🇩🇪 974 54 10ms 19 Oct 2023 613th GrayJoKing 🇦🇺 974 54 9ms 1 Nov 2023 613th rucin93 🇵🇱 974 54 10ms 31 Jan 2024 613th zach333 974 54 9ms 18 Jul 2024 613th CaedenHarper 🇨🇦 974 54 9ms 2 Aug 2024 613th duckyluuk 🇳🇱 974 54 9ms 15 Aug 2024 613th GolfingSuccess 🇬🇷 974 54 10ms 15 Feb 2025 613th SanderRuud 974 54 10ms 12 Jul 2025 613th CornerMercury 🇬🇧 974 54 9ms 23 Nov 2025 613th Babafaba 974 54 9ms 27 Nov 2025 613th Mukundan314 974 54 12ms 5 Dec 2025 613th JOrE20 974 54 10ms 21 Feb 2026 613th plcc0 974 54 12ms 1 Mar 2026 636th retrohun 973 55 2ms 16 Mar 2019 636th primo-ppcg 🇹🇭 973 55 13ms 27 Mar 2019 636th GrayJoKing 🇦🇺 973 55 3ms 21 Nov 2021 636th andersk 🇺🇸 973 55 2ms 24 Nov 2021 636th sisyphus-ppcg 🇦🇺 973 55 2ms 30 Nov 2021 First Prev 561–640 of 13,387 Next Last