The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 days. Why not try and solve them ahead of time?
Abundant 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 801st jerrandolph 854 117 291ms 20 Oct 2023 801st JRaspass 🇬🇧 854 117 301ms 7 Feb 2024 803rd frankgraziano 854 199 695ms 12 Aug 2025 804th Tine86 853 66 41ms 30 Jul 2025 805th msbranicky 853 75 140ms 7 Sep 2023 806th ovs-code 🇩🇪 853 149 1,806ms 14 Sep 2025 806th MeWhenI 🇻🇦 853 149 1,718ms 7 Nov 2025 808th jared-hughes 853 151 315ms 18 Dec 2024 809th Steffan153 🇫🇮 852 44 102ms 15 Aug 2024 810th jsthope 852 63 24ms 21 Nov 2022 810th HPWiz 🇳🇿 852 63 3,184ms 12 Dec 2025 812th MeWhenI 🇻🇦 852 77 56ms 9 May 2024 813th GolfingSuccess 🇬🇷 852 143 1,450ms 6 Dec 2025 814th steffan-polygolf 851 72 144ms 19 Feb 2023 814th dokutan 851 72 130ms 6 Jan 2024 816th CatsAreFluffy 851 88 360ms 28 Nov 2022 816th bwat2 851 88 362ms 6 Apr 2023 816th Adix-null 🇱🇹 851 88 388ms 17 May 2023 816th Ripick 851 88 384ms 14 Jun 2025 816th qrakhen 851 88 432ms 1 Dec 2025 821st Re-Adventures 🇮🇳 851 94 65ms 20 Nov 2022 821st Irratix 🇳🇱 851 94 61ms 15 Dec 2022 821st Yewzir 🇧🇪 851 94 63ms 3 Feb 2023 821st emgordon154 851 94 65ms 8 Feb 2026 825th emgordon154 850 52 162ms 6 Jun 2025 826th Shanethegamer 🇺🇸 850 72 143ms 19 Nov 2022 826th KatieLG 🇬🇧 850 72 150ms 14 Jan 2023 826th HumanoidCPU 850 72 136ms 2 May 2024 829th kmathis22 849 93 364ms 23 Oct 2025 829th ethanlally 849 93 477ms 12 Nov 2025 829th prestosilver 🇺🇸 849 93 428ms 7 hours ago 829th error256 849 93 355ms 7 hours ago 829th tomh1012 849 93 383ms 7 hours ago 829th jkelly467 849 93 375ms 4 hours ago 835th sisyphus-ppcg 🇦🇺 848 36 321ms 9 Feb 2023 836th ovs-code 🇩🇪 848 152 315ms 9 Jul 2024 837th AlephSquirrel 847 60 466ms 21 Jan 2024 837th b-illy 🇬🇧 847 60 496ms 7 Sep 2024 837th HumanoidCPU 847 60 425ms 9 Sep 2024 837th lifthrasiir 🇰🇷 847 60 435ms 2 Dec 2024 837th JunkIce 847 60 425ms 3 Dec 2024 837th commandz0 🇺🇸 847 60 468ms 1 Sep 2025 843rd JGDoerrer 847 87 131ms 20 Dec 2022 843rd makononov 847 87 135ms 5 Mar 2025 843rd Florian-Mt 847 87 127ms 10 Dec 2025 843rd AndreiDTU 847 87 133ms 24 days ago 847th dokutan 847 118 292ms 8 Dec 2023 848th Betuaredead 846 58 11ms 7 Jan 2023 848th raphaelimahorn 846 58 10ms 24 Mar 2023 848th piano-miles 846 58 11ms 30 Mar 2023 848th ShiraJoseph 🇺🇸 846 58 13ms 21 Jul 2023 848th Larento 846 58 11ms 13 Oct 2023 848th Davr1 🇨🇿 846 58 15ms 15 Oct 2023 848th uttumuttu 🇫🇮 846 58 11ms 22 Dec 2023 848th efgen 846 58 11ms 26 Dec 2023 848th mrondon8 846 58 17ms 4 Dec 2024 848th Andrey-Plotnikov 846 58 11ms 21 Jun 2025 848th CaedenHarper 🇨🇦 846 58 11ms 3 Sep 2025 848th LordSir101 846 58 13ms 17 Sep 2025 848th albanian-laundromat 846 58 13ms 18 Nov 2025 861st janbehrens 🇩🇪 846 63 14ms 19 Nov 2022 862nd Yewzir 🇧🇪 846 90 472ms 5 Nov 2023 862nd snoozingnewt 🇨🇦 846 90 475ms 10 Dec 2025 864th adriweb 🇫🇷 845 77 54ms 29 Aug 2023 864th frosster 🇨🇦 845 77 49ms 7 Feb 2026 866th AlephSquirrel 844 29 11ms 4 Nov 2025 867th primo-ppcg 🇹🇭 844 71 2ms 20 Nov 2022 867th DialFrost 🇸🇬 844 71 2ms 15 Dec 2025 869th ovs-code 🇩🇪 844 80 1,545ms 4 Jul 2024 870th KatieLG 🇬🇧 844 105 364ms 21 Nov 2022 871st DialFrost 🇸🇬 843 66 639ms 16 Dec 2024 872nd Shanethegamer 🇺🇸 842 68 86ms 22 Nov 2024 872nd primo-ppcg 🇹🇭 842 68 79ms 5 Apr 2025 872nd Steffan153 🇫🇮 842 68 81ms 13 Feb 2026 875th janbehrens 🇩🇪 842 95 63ms 20 Nov 2022 875th Shanethegamer 🇺🇸 842 95 64ms 2 Dec 2022 875th Betuaredead 842 95 62ms 6 Jan 2023 875th MateuszPietrzak 🇵🇱 842 95 63ms 30 Nov 2023 875th oceko 842 95 63ms 19 Feb 2024 875th dokutan 842 95 65ms 31 Jan 2025 First Prev 801–880 of 2,740 Next Last