The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Pascal’s Triangle 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 641st DialFrost 🇸🇬 854 72 2ms 12 Nov 2025 642nd bstrautin 853 44 278ms 2 Aug 2020 643rd ovs-code 🇩🇪 853 68 2ms 10 Oct 2023 643rd GolfingSuccess 🇬🇷 853 68 1ms 14 Oct 2023 645th tailorspy 853 93 66ms 23 Oct 2025 646th MeWhenI 🇻🇦 853 204 12ms 19 Apr 2025 647th DialFrost 🇸🇬 852 67 7ms 17 Dec 2024 648th annaproxy 852 122 24ms 13 Feb 2022 648th BREMAUCY 🇫🇷 852 122 25ms 5 May 2024 648th dokutan 852 122 26ms 24 Nov 2025 648th tomh1012 852 122 25ms 17 Feb 2026 652nd Shanethegamer 🇺🇸 851 72 147ms 28 Jun 2021 652nd GrayJoKing 🇦🇺 851 72 145ms 6 Nov 2021 654th Yax42 🇫🇷 851 85 432ms 30 Jul 2025 655th GrayJoKing 🇦🇺 850 60 3ms 20 Jul 2023 655th Shanethegamer 🇺🇸 850 60 3ms 21 Dec 2024 657th kg583 🇺🇸 850 100 32ms 12 days ago 658th primo-ppcg 🇹🇭 849 45 264ms 24 Dec 2018 658th ovs-code 🇩🇪 849 45 281ms 10 May 2024 658th DialFrost 🇸🇬 849 45 250ms 17 May 2024 658th Steffan153 🇫🇮 849 45 262ms 23 May 2024 658th sean-niemann 🇺🇸 849 45 261ms 13 Mar 2025 663rd emplv 🇱🇻 849 78 112ms 6 Dec 2022 664th timvermeulen 849 89 124ms 4 Jan 2020 664th error256 849 89 132ms 12 May 2025 666th MeWhenI 🇻🇦 849 90 489ms 7 Nov 2025 667th chris124567 849 118 282ms 27 Sep 2021 668th primo-ppcg 🇹🇭 849 126 2ms 2 Oct 2020 669th MeWhenI 🇻🇦 848 26 37ms 23 Jul 2022 669th emgordon154 848 26 39ms 12 Sep 2024 671st achimkrause 848 78 120ms 11 Jul 2018 671st bforte 848 78 116ms 21 Dec 2018 673rd Attero 🇸🇪 847 59 10ms 21 Oct 2020 673rd revlayle 🇺🇸 847 59 11ms 9 Feb 2021 673rd itsh01 847 59 10ms 3 Nov 2021 673rd helbling 🇨🇭 847 59 9ms 7 May 2024 673rd Lv0Sys 🇵🇱 847 59 11ms 21 Dec 2025 678th DialFrost 🇸🇬 847 69 38ms 16 Feb 2025 679th hiddicop 🇸🇪 846 45 36ms 30 Jan 2021 680th DialFrost 🇸🇬 846 58 750ms 12 Nov 2025 681st Salutations45 845 51 1ms 3 Oct 2025 682nd IanUtley 845 70 1,671ms 4 Oct 2023 682nd Yewzir 🇧🇪 845 70 150ms 27 Mar 2024 682nd stefangimmillaro 845 70 2,612ms 28 Oct 2024 685th arjanadriaanse 🇳🇱 845 123 25ms 12 Feb 2022 685th ndren 845 123 24ms 31 Jul 2023 685th weliveinhell 🇭🇹 845 123 24ms 26 Sep 2023 688th sean-niemann 🇺🇸 844 94 66ms 7 May 2024 688th inventshah 844 94 332ms 27 Mar 2025 690th emplv 🇱🇻 843 73 2ms 28 Apr 2022 691st edsrzf 🇳🇿 843 95 30ms 6 Feb 2026 692nd PFischbeck 842 58 11ms 7 Feb 2018 692nd daedals 842 58 10ms 18 Apr 2019 692nd Sakaala 842 58 11ms 23 Apr 2019 692nd rak1507 🇬🇧 842 58 10ms 29 Dec 2020 692nd LlamaLad7 🇬🇧 842 58 10ms 16 Jan 2021 692nd artieleach 842 58 11ms 7 Feb 2021 692nd 77Tigers 842 58 10ms 28 Feb 2021 692nd Indivicivet 842 58 9ms 15 Mar 2021 692nd ArmaanAS 842 58 10ms 26 Mar 2021 692nd Kloppermand 🇩🇰 842 58 10ms 26 Aug 2021 692nd RYNO8 842 58 11ms 28 Aug 2021 692nd tianshuo 842 58 10ms 13 Feb 2022 692nd CedricGebistorf 842 58 11ms 4 Mar 2022 692nd tkr-sh 🇰🇵 842 58 10ms 16 Apr 2022 692nd thisishowmymindworks 🇳🇴 842 58 10ms 25 Apr 2022 692nd ademdj19 842 58 10ms 29 Apr 2022 692nd jdw1023 842 58 10ms 29 Apr 2022 692nd programjames 842 58 12ms 7 May 2022 692nd suwat513 842 58 10ms 22 Sep 2022 692nd stefangimmillaro 842 58 12ms 6 Oct 2022 692nd nexaitch 842 58 10ms 13 Oct 2022 692nd fourth-bit 842 58 10ms 13 Nov 2022 692nd aksyristos 842 58 10ms 28 Dec 2022 692nd nayakrujul 842 58 10ms 3 Jan 2023 692nd randolchance 842 58 10ms 6 Mar 2023 692nd ABoredNErd 842 58 10ms 24 Apr 2023 692nd rollershutter 842 58 11ms 4 Jul 2023 692nd Grrisly 842 58 10ms 4 Nov 2023 692nd jtaxen 842 58 10ms 25 Mar 2024 First Prev 641–720 of 3,048 Next Last