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?
Odious Numbers (Long) 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 841st tommasotode 832 48 16ms 20 Sep 2025 841st solisolu 832 48 10ms 28 Oct 2025 841st Deedogg 832 48 10ms 30 Oct 2025 841st butnaruteodor 832 48 10ms 30 Oct 2025 841st madeforlosers 832 48 11ms 11 Nov 2025 841st CommandLeo 🇮🇹 832 48 16ms 12 Nov 2025 841st Andrey2001 832 48 10ms 27 Nov 2025 841st jtaxen 832 48 18ms 8 Jan 2026 841st SectorCorruptor 832 48 16ms 14 days ago 890th GrayJoKing 🇦🇺 832 75 28ms 1 Jan 2023 890th prplz 🇦🇺 832 75 30ms 10 Jan 2023 890th ovs-code 🇩🇪 832 75 27ms 11 Jan 2023 890th m-tkach 🇺🇦 832 75 26ms 12 Aug 2023 890th sean-niemann 🇺🇸 832 75 26ms 19 May 2025 895th MeWhenI 🇻🇦 832 99 79ms 3 days ago 896th edsrzf 🇳🇿 832 126 1,720ms 13 Sep 2025 897th ovs-code 🇩🇪 831 43 144ms 4 Aug 2024 897th emplv 🇱🇻 831 43 142ms 29 Oct 2024 899th annaproxy 831 63 382ms 4 Jan 2023 900th GrayJoKing 🇦🇺 830 32 274ms 26 Oct 2023 901st Steffan153 🇫🇮 830 40 3ms 5 Aug 2024 902nd Babafaba 830 57 2ms 14 Oct 2025 903rd GrayJoKing 🇦🇺 830 60 120ms 7 Sep 2022 904th msbranicky 830 73 24ms 3 Jan 2024 904th albanian-laundromat 830 73 26ms 3 Dec 2025 906th edsrzf 🇳🇿 830 81 94ms 19 days ago 907th yzhs 🇩🇪 829 34 1,257ms 21 Jun 2023 907th DialFrost 🇸🇬 829 34 1,298ms 27 Sep 2023 907th dokutan 829 34 1,286ms 30 Apr 2024 907th FlyingPenguin223 829 34 1,294ms 1 Nov 2024 911th JayXon 🇺🇸 829 44 2ms 15 Jan 2024 912th duckyluuk 🇳🇱 829 45 9ms 4 Oct 2024 912th snoozingnewt 🇨🇦 829 45 10ms 25 Oct 2025 914th Ripick 829 55 144ms 8 Jan 2023 914th fuzzylojik-golf 🇺🇸 829 55 7ms 24 Sep 2025 916th GrayJoKing 🇦🇺 829 68 123ms 7 Sep 2022 916th Shanethegamer 🇺🇸 829 68 114ms 9 Sep 2022 916th ian-h-chamberlain 🇺🇸 829 68 122ms 15 Sep 2022 916th msbranicky 829 68 125ms 3 Oct 2023 916th Yewzir 🇧🇪 829 68 121ms 17 Nov 2023 916th dokutan 829 68 128ms 27 Mar 2024 916th The3gs 829 68 125ms 29 Nov 2024 916th Natanaelel 🇸🇪 829 68 122ms 24 Jul 2025 924th jared-hughes 829 124 11ms 7 Jul 2024 925th Shanethegamer 🇺🇸 828 74 462ms 6 Sep 2022 925th ovs-code 🇩🇪 828 74 459ms 15 Jun 2024 925th dokutan 828 74 448ms 15 Feb 2026 928th GrayJoKing 🇦🇺 827 18 45ms 7 Sep 2022 928th AlephSquirrel 827 18 48ms 3 Dec 2022 928th primo-ppcg 🇹🇭 827 18 47ms 7 Dec 2022 928th prplz 🇦🇺 827 18 46ms 10 Dec 2022 928th orthoplex 🇨🇽 827 18 46ms 3 Oct 2023 928th ovs-code 🇩🇪 827 18 47ms 3 Oct 2023 928th pardouin 🇫🇷 827 18 50ms 6 Sep 2024 928th 5quiwyrm 827 18 49ms 14 Nov 2024 928th snoozingnewt 🇨🇦 827 18 46ms 8 Dec 2025 937th HumanoidCPU 827 42 417ms 4 May 2024 938th MeWhenI 🇻🇦 827 57 36ms 6 Sep 2022 939th Steffan153 🇫🇮 826 43 5ms 26 Jul 2024 939th sean-niemann 🇺🇸 826 43 5ms 14 Apr 2025 939th targrik 826 43 89ms 16 Dec 2025 942nd Shanethegamer 🇺🇸 826 51 90ms 9 Sep 2022 942nd dokutan 826 51 93ms 28 Jul 2024 942nd pardouin 🇫🇷 826 51 94ms 5 Sep 2024 942nd kaascevich 826 51 103ms 9 Jul 2025 942nd snoozingnewt 🇨🇦 826 51 101ms 30 Sep 2025 947th GolfingSuccess 🇬🇷 825 42 1,024ms 29 Aug 2025 947th MeWhenI 🇻🇦 825 42 943ms 15 Sep 2025 947th Yewzir 🇧🇪 825 42 977ms 15 Nov 2025 950th GrayJoKing 🇦🇺 825 65 85ms 23 Jul 2024 951st GolfingSuccess 🇬🇷 824 17 2ms 9 Feb 2023 952nd Vinterion 824 80 62ms 11 Nov 2023 952nd snyderek 🇺🇸 824 80 57ms 23 Feb 2025 952nd gjoacorp 🇬🇧 824 80 52ms 4 Aug 2025 955th sean-niemann 🇺🇸 823 31 4ms 14 May 2025 956th GolfingSuccess 🇬🇷 823 100 19ms 13 days ago 957th saito-ta 🇯🇵 820 96 6ms 14 Sep 2022 958th msbranicky 819 128 1,736ms 16 Sep 2025 959th msbranicky 817 54 8ms 28 Aug 2023 959th dokutan 817 54 6ms 29 Jul 2024 First Prev 881–960 of 2,566 Next Last