The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 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 559th MeWhenI 🇻🇦 866 71 2ms 7 May 2023 559th Herbert00709 🇵🇱 866 71 2ms 11 Jun 2025 563rd Shanethegamer 🇺🇸 866 120 25ms 19 Mar 2023 563rd janAkali 🇷🇺 866 120 26ms 5 Feb 2026 565th MeWhenI 🇻🇦 866 134 1,507ms 28 Mar 2025 566th MeWhenI 🇻🇦 865 67 1ms 9 Oct 2023 567th primo-ppcg 🇹🇭 865 201 11ms 13 Aug 2025 568th DialFrost 🇸🇬 863 92 62ms 12 Nov 2025 569th btnlq 862 50 1ms 1 Nov 2022 570th edsrzf 🇳🇿 862 57 1,266ms 6 Feb 2026 571st namelessiw 862 84 425ms 9 Apr 2025 572nd DialFrost 🇸🇬 861 52 398ms 15 Jan 2024 572nd snoozingnewt 🇨🇦 861 52 372ms 27 days ago 574th tomtheisen 🇺🇸 861 58 11ms 15 Oct 2020 574th janbehrens 🇩🇪 861 58 9ms 8 Jun 2021 574th prplz 🇦🇺 861 58 10ms 9 Jul 2021 574th MeWhenI 🇻🇦 861 58 11ms 27 Dec 2022 574th voytxt 🇨🇿 861 58 11ms 3 Sep 2023 574th pardouin 🇫🇷 861 58 10ms 3 Nov 2024 574th Salutations45 861 58 11ms 3 Oct 2025 581st edsrzf 🇳🇿 860 93 111ms 4 Dec 2025 582nd Lydxn 🇨🇦 859 60 6ms 23 Dec 2023 583rd laikoni 859 77 118ms 3 Mar 2019 583rd JayXon 🇺🇸 859 77 113ms 2 Oct 2021 583rd GrayJoKing 🇦🇺 859 77 116ms 16 Mar 2022 583rd Shanethegamer 🇺🇸 859 77 122ms 19 May 2025 583rd Natanaelel 🇸🇪 859 77 127ms 23 Jun 2025 583rd edsrzf 🇳🇿 859 77 128ms 23 Dec 2025 589th edsrzf 🇳🇿 859 99 33ms 13 days ago 589th Steffan153 🇫🇮 859 99 32ms 8 days ago 589th GolfingSuccess 🇬🇷 859 99 35ms 6 days ago 592nd lynn 858 69 154ms 19 May 2021 592nd sean-niemann 🇺🇸 858 69 153ms 16 Jan 2024 594th dokutan 858 76 2ms 6 Jun 2025 595th ovs-code 🇩🇪 858 132 6ms 31 Mar 2023 596th MeWhenI 🇻🇦 858 153 1,683ms 7 Nov 2025 597th JayXon 🇺🇸 857 66 78ms 22 Mar 2023 597th Lydxn 🇨🇦 857 66 76ms 22 Mar 2023 599th rowan-OzRunways 857 77 93ms 13 Aug 2020 600th RDShah 856 57 10ms 19 Jan 2018 600th ssilwa 856 57 11ms 19 Jan 2018 600th Constructor7 856 57 10ms 22 Feb 2018 600th Mr-Xcoder 856 57 10ms 19 Jun 2018 600th cellobix 856 57 10ms 14 Aug 2019 600th nullie 856 57 10ms 1 Apr 2020 600th OllieBoyne 🇬🇧 856 57 10ms 30 Dec 2020 600th fynnkroeger 856 57 10ms 10 Jan 2021 600th jared-hughes 856 57 10ms 20 Oct 2021 600th Fishron 856 57 9ms 26 Nov 2021 600th Natanaelel 🇸🇪 856 57 11ms 15 Dec 2021 600th annaproxy 856 57 10ms 1 Feb 2022 600th AlephSquirrel 856 57 10ms 7 Jul 2022 600th osmith93 856 57 11ms 10 Jul 2022 600th TobyBoyne 🇬🇧 856 57 10ms 12 Aug 2022 600th Eilonlif 🇮🇱 856 57 9ms 4 Sep 2022 600th 0-4849 856 57 11ms 17 Nov 2022 600th scpchicken 🇵🇼 856 57 10ms 1 Jan 2023 600th ljweel 856 57 10ms 13 Feb 2023 600th janbehrens 🇩🇪 856 57 10ms 17 Jun 2023 600th kmaork 🇮🇱 856 57 10ms 30 Jun 2023 600th 5quiwyrm 856 57 11ms 28 Jul 2023 600th yourlefthandman 856 57 10ms 17 Aug 2023 600th Yewzir 🇧🇪 856 57 11ms 18 Sep 2023 600th StefanHabel 🇨🇦 856 57 10ms 20 Sep 2023 600th commandz0 🇺🇸 856 57 10ms 17 Nov 2023 600th logvp 856 57 10ms 27 Dec 2023 600th stertooy 🇧🇪 856 57 11ms 16 Jun 2024 600th Bulmenisaurus 856 57 10ms 1 Jul 2024 600th souta-1326 856 57 11ms 24 Mar 2025 600th InigoK 🇺🇸 856 57 11ms 20 Sep 2025 600th setop 856 57 10ms 6 Oct 2025 600th ryyyn 🇺🇸 856 57 11ms 13 Nov 2025 600th CommandLeo 🇮🇹 856 57 11ms 27 Nov 2025 600th JOrE20 856 57 11ms 27 Feb 2026 635th scpchicken 🇵🇼 855 25 117ms 5 Apr 2022 635th pardouin 🇫🇷 855 25 107ms 17 Aug 2024 637th error256 855 62 61ms 28 Dec 2025 638th Steffan153 🇫🇮 855 63 4ms 21 Apr 2023 638th primo-ppcg 🇹🇭 855 63 4ms 28 Apr 2023 638th edsrzf 🇳🇿 855 63 4ms 17 Feb 2025 First Prev 561–640 of 3,048 Next Last