The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Ordinal Numbers in all languages 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 878th adamnielson42 🇺🇸 771 83 11ms 25 Apr 2023 878th TheDarkThatBarks 771 83 11ms 28 Jan 2024 883rd janbehrens 🇩🇪 771 85 238ms 5 Dec 2023 884th primo-ppcg 🇹🇭 771 117 1,436ms 10 Feb 2022 884th lynn 771 117 1,316ms 17 Feb 2023 886th DialFrost 🇸🇬 770 55 122ms 5 Mar 2025 887th GrayJoKing 🇦🇺 770 142 28ms 17 Feb 2023 887th edsrzf 🇳🇿 770 142 159ms 29 Jul 2025 889th targrik 770 161 304ms 3 Jul 2025 890th Shanethegamer 🇺🇸 768 99 163ms 24 May 2025 891st MeWhenI 🇻🇦 768 118 46ms 13 Feb 2025 891st snoozingnewt 🇨🇦 768 118 97ms 20 Nov 2025 893rd strout 768 148 180ms 15 Aug 2022 894th qrakhen 767 107 417ms 14 Nov 2025 895th petar-donchev 765 102 13ms 26 Aug 2019 895th jiaminglimjm 🇲🇾 765 102 13ms 12 Dec 2019 895th Malin001 765 102 12ms 4 Jan 2020 895th adamcbrown 765 102 13ms 22 Aug 2020 895th lukasthaler 765 102 13ms 11 Sep 2020 895th hiddicop 🇸🇪 765 102 11ms 25 Jan 2021 895th harrymwilkins 🇬🇧 765 102 12ms 20 Jul 2021 895th sleepyStick 765 102 13ms 8 Dec 2021 895th Trunksistor 🇫🇷 765 102 13ms 14 Apr 2022 895th jhpaques 🇫🇷 765 102 13ms 2 Aug 2022 895th n0Oo0Oo0b 765 102 19ms 28 Dec 2022 895th yishayv 765 102 13ms 23 Jan 2023 895th fourth-bit 765 102 13ms 11 Jul 2023 895th quimey 765 102 12ms 2 Aug 2023 895th Mabeloid 🇳🇴 765 102 12ms 4 Oct 2024 910th Heathcorp 🇦🇺 765 105 2ms 17 Feb 2022 910th snoozingnewt 🇨🇦 765 105 2ms 23 Sep 2023 912th Shanethegamer 🇺🇸 765 117 407ms 8 Apr 2022 913th MeWhenI 🇻🇦 765 130 590ms 13 Aug 2022 914th Agazoth 764 70 262ms 17 Nov 2020 915th Babafaba 764 86 430ms 17 Nov 2025 916th emgordon154 764 143 164ms 14 Mar 2025 917th ovs-code 🇩🇪 763 109 14ms 16 Jul 2023 917th AlephSquirrel 763 109 14ms 3 Aug 2023 919th primo-ppcg 🇹🇭 763 149 176ms 18 Oct 2019 919th Natanaelel 🇸🇪 763 149 174ms 15 Feb 2025 921st Shanethegamer 🇺🇸 762 79 6ms 2 Jul 2023 921st edsrzf 🇳🇿 762 79 7ms 12 Jun 2025 923rd dijs 762 84 12ms 8 Dec 2019 923rd Garklein 🇨🇦 762 84 10ms 4 Jan 2022 923rd weliveinhell 🇭🇹 762 84 12ms 26 Jan 2024 923rd FlorianCassayre 🇫🇷 762 84 11ms 18 May 2024 923rd jake6192 762 84 12ms 16 May 2025 928th GolfingSuccess 🇬🇷 762 90 11ms 19 Dec 2024 929th DialFrost 🇸🇬 761 43 3ms 3 Feb 2024 929th bstrat 761 43 3ms 13 Sep 2024 929th lifthrasiir 🇰🇷 761 43 3ms 29 Nov 2024 932nd SirBogman 🇺🇸 761 62 35ms 5 Jun 2025 933rd kmathis22 761 132 457ms 3 Dec 2025 934th CaedenHarper 🇨🇦 761 163 302ms 2 Dec 2025 935th jacobly0 🇺🇸 761 203 1,744ms 22 Apr 2024 936th emgordon154 760 100 11ms 6 Dec 2024 937th ScottHamper 760 108 383ms 21 Nov 2021 938th lynn 759 144 32ms 16 Jul 2023 939th qzdl 758 98 20ms 20 Sep 2020 940th nexaitch 758 106 2ms 10 Jul 2020 941st Psirving 757 103 12ms 2 Aug 2020 941st garrisonhh 757 103 13ms 22 Nov 2020 941st AkashTandon167 757 103 12ms 26 Nov 2020 941st NanduBC 757 103 14ms 18 Mar 2021 941st clementblaudeau 757 103 12ms 1 Jun 2021 941st SniperSmiley 🇺🇸 757 103 12ms 23 Jun 2021 941st lemogne 757 103 12ms 10 Aug 2021 941st CedricGebistorf 757 103 13ms 25 Feb 2022 941st knutae 🇳🇴 757 103 14ms 1 Mar 2022 941st petroselo 757 103 12ms 10 Apr 2022 941st b10011 🇫🇮 757 103 13ms 7 Jan 2023 941st DanielPeterssonAI 757 103 13ms 15 Mar 2023 941st Terobero 757 103 20ms 4 Sep 2024 941st luuumine 🇫🇷 757 103 13ms 16 Oct 2025 941st Aquateraneal 🇺🇸 757 103 12ms 19 Feb 2026 956th SirBogman 🇺🇸 756 41 66ms 19 Sep 2022 957th emgordon154 756 106 6ms 30 Dec 2024 958th tailorspy 756 128 472ms 12 Aug 2024 959th msbranicky 756 164 288ms 9 Jan 2025 959th edsrzf 🇳🇿 756 164 304ms 29 Jul 2025 First Prev 881–960 of 1,902 Next Last
