The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Pangram Grep 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 560th KasperKivimaeki 🇫🇮 848 67 11ms 8 May 2025 562nd kg583 🇺🇸 848 126 43ms 14 Feb 2025 562nd edsrzf 🇳🇿 848 126 42ms 3 Feb 2026 564th error256 848 205 1,538ms 12 Jul 2025 565th dokutan 847 83 6ms 1 Jul 2024 565th edsrzf 🇳🇿 847 83 10ms 12 Jan 2025 567th h3ra993huskp 🇯🇵 846 103 544ms 30 Nov 2025 568th arjanadriaanse 🇳🇱 846 116 137ms 26 Nov 2021 569th btnlq 845 85 24ms 16 Dec 2021 570th fuzzylojik-golf 🇺🇸 844 36 5ms 21 Jul 2025 571st GrayJoKing 🇦🇺 844 62 547ms 16 Jan 2024 571st m-tkach 🇺🇦 844 62 497ms 20 Jan 2024 571st AlephSquirrel 844 62 517ms 22 Jan 2024 571st Yewzir 🇧🇪 844 62 516ms 4 Feb 2024 571st Shanethegamer 🇺🇸 844 62 514ms 4 Mar 2024 571st neel11235813 844 62 512ms 14 Mar 2024 571st dokutan 844 62 409ms 29 Apr 2024 571st lynn 844 62 484ms 27 Nov 2025 579th Yewzir 🇧🇪 844 178 1,959ms 14 Nov 2025 580th sean-niemann 🇺🇸 842 100 36ms 11 Jul 2025 580th DialFrost 🇸🇬 842 100 37ms 30 Dec 2025 582nd Shanethegamer 🇺🇸 840 97 2ms 25 Feb 2023 582nd mtirado1 840 97 2ms 17 Apr 2023 582nd NickTheEASDude 🇺🇸 840 97 2ms 10 Sep 2024 582nd Waffle3z 840 97 2ms 26 Dec 2025 582nd FlyingPenguin223 840 97 2ms 29 Dec 2025 582nd Steffan153 🇫🇮 840 97 2ms 11 Feb 2026 588th edsrzf 🇳🇿 839 114 8ms 24 Feb 2026 589th vezzick 838 71 12ms 8 Mar 2021 589th P-Quentin 🇫🇷 838 71 11ms 3 Aug 2022 589th enbyte 838 71 11ms 9 Dec 2023 589th xyangst 838 71 12ms 3 Oct 2024 589th robin-scragg 838 71 11ms 18 Oct 2025 594th kaascevich 838 93 91ms 19 Jul 2025 595th DialFrost 🇸🇬 837 82 109ms 17 Feb 2026 596th snoozingnewt 🇨🇦 837 114 42ms 16 days ago 597th GrayJoKing 🇦🇺 836 121 33ms 8 Jan 2023 598th primo-ppcg 🇹🇭 836 251 362ms 13 Aug 2025 599th mintypython 835 68 13ms 19 Oct 2018 599th shraiwi 835 68 11ms 21 Aug 2019 599th Andrey-Plotnikov 835 68 10ms 10 Oct 2024 602nd Shanethegamer 🇺🇸 835 128 44ms 13 Feb 2025 603rd kg583 🇺🇸 835 134 118ms 8 Jan 2026 603rd GolfingSuccess 🇬🇷 835 134 129ms 25 days ago 603rd Steffan153 🇫🇮 835 134 82ms 42 hours ago 603rd edsrzf 🇳🇿 835 134 81ms 40 hours ago 607th jaredcrystal 🇺🇸 832 45 41ms 14 Dec 2020 607th mrondon8 832 45 40ms 12 Sep 2021 607th acornellier 832 45 37ms 1 Dec 2021 607th Haksell 🇦🇶 832 45 37ms 22 Feb 2023 611th dokutan 832 98 2ms 22 Apr 2024 611th GrayJoKing 🇦🇺 832 98 2ms 23 Dec 2025 613th anastos 832 118 138ms 23 Jul 2018 613th user189032 832 118 126ms 29 May 2019 613th boxjelly 832 118 140ms 7 Jan 2021 613th Natanaelel 🇸🇪 832 118 130ms 30 Sep 2021 613th annaproxy 832 118 145ms 15 Nov 2021 613th tobeannouncd 832 118 121ms 3 Jan 2024 619th primo-ppcg 🇹🇭 831 37 36ms 24 Mar 2025 620th DialFrost 🇸🇬 831 63 396ms 15 Jan 2024 620th xsot 🇸🇬 831 63 543ms 28 Jan 2024 622nd MeWhenI 🇻🇦 831 123 26ms 13 Jul 2021 623rd KasperKivimaeki 🇫🇮 831 142 300ms 25 Sep 2025 624th MeWhenI 🇻🇦 830 167 53ms 30 Jun 2022 625th duckyluuk 🇳🇱 829 71 8ms 3 Jan 2025 626th MeWhenI 🇻🇦 829 94 111ms 8 Mar 2023 627th Steffan153 🇫🇮 829 122 28ms 9 Jun 2024 628th MeWhenI 🇻🇦 828 129 45ms 11 Feb 2025 629th rak1507 🇬🇧 826 25 3ms 10 Jan 2022 629th NewDefectus 🇮🇱 826 25 3ms 14 Jan 2022 629th Natanaelel 🇸🇪 826 25 3ms 21 Jan 2022 629th razetime 826 25 3ms 22 Aug 2022 629th gnuvince 826 25 3ms 29 Jun 2025 634th marcin7Cd 826 72 12ms 6 Mar 2021 634th xnor-gate 826 72 13ms 3 Apr 2021 634th neihousaigaai 826 72 12ms 28 Jul 2022 634th betaveros 826 72 11ms 9 Aug 2022 634th Bubbler-4 826 72 11ms 1 Jan 2023 634th AlephSquirrel 826 72 12ms 26 Mar 2023 634th kaptsanovb 826 72 12ms 20 Apr 2023 First Prev 561–640 of 2,690 Next Last