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?
Sierpiński Triangle in all languages in bytes. 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 Bytes Time Submitted 481st janbehrens 🇩🇪 742 66 5ms 28 Nov 2023 482nd MeWhenI 🇻🇦 742 95 513ms 7 Nov 2025 483rd clockworknazo 742 100 3ms 6 Mar 2023 484th cure-honey 🇯🇵 741 133 281ms 9 Jul 2021 485th iznax 740 87 360ms 21 Nov 2021 486th MeepMoop 739 88 2ms 9 Apr 2025 487th janbehrens 🇩🇪 739 96 485ms 28 Nov 2023 488th Shanethegamer 🇺🇸 738 75 2ms 11 Sep 2022 489th dunkyl 738 89 1,390ms 16 Nov 2023 490th Yewzir 🇧🇪 737 103 8ms 24 Dec 2023 491st Maznek 736 65 12ms 25 Jun 2023 492nd daedals 736 76 10ms 14 May 2019 492nd petar-donchev 736 76 9ms 8 Sep 2019 492nd jared-hughes 736 76 9ms 10 Sep 2022 492nd betaveros 736 76 10ms 31 Dec 2022 492nd stertooy 🇧🇪 736 76 10ms 14 Jun 2024 492nd moustave 736 76 10ms 15 Jul 2025 498th ovs-code 🇩🇪 735 76 2ms 3 Jun 2024 499th MeWhenI 🇻🇦 735 80 164ms 17 Nov 2022 500th retrohun 734 78 5ms 25 Sep 2022 501st MeWhenI 🇻🇦 733 174 1,463ms 9 Feb 2025 502nd emgordon154 732 63 1,366ms 3 Jun 2025 503rd Shanethegamer 🇺🇸 732 73 473ms 8 Oct 2024 504th MeWhenI 🇻🇦 732 88 379ms 17 Nov 2022 504th tomtheisen 🇺🇸 732 88 362ms 15 Dec 2022 506th timvermeulen 731 105 141ms 5 Jan 2020 506th snobee 🇨🇦 731 105 161ms 12 Dec 2022 508th bstrat 727 44 2ms 19 Jun 2024 508th emgordon154 727 44 2ms 24 Feb 2026 510th SirBogman 🇺🇸 726 77 10ms 4 Dec 2022 510th YAJUE114514 726 77 9ms 30 Jul 2025 510th Lv0Sys 🇵🇱 726 77 10ms 20 Feb 2026 513th Irratix 🇳🇱 726 81 157ms 26 Dec 2020 514th tomtheisen 🇺🇸 725 66 13ms 12 Oct 2020 514th Attero 🇸🇪 725 66 11ms 21 Oct 2020 514th NewDefectus 🇮🇱 725 66 10ms 9 Nov 2021 514th Argeento 🇵🇱 725 66 12ms 28 Dec 2021 514th MeWhenI 🇻🇦 725 66 10ms 17 Nov 2022 514th GrayJoKing 🇦🇺 725 66 10ms 24 Jan 2023 514th Yax42 🇫🇷 725 66 8ms 13 Sep 2025 521st AlephSquirrel 725 77 2ms 25 May 2020 521st NewDefectus 🇮🇱 725 77 2ms 9 Nov 2021 521st lynn 725 77 2ms 30 Nov 2021 521st MeWhenI 🇻🇦 725 77 1ms 17 Nov 2022 521st BlankSpruce 725 77 2ms 8 Aug 2024 526th dpatterbee 725 136 281ms 23 Nov 2020 527th stefangimmillaro 723 93 116ms 20 Oct 2022 528th SirBogman 🇺🇸 723 95 113ms 17 Jun 2020 529th Shanethegamer 🇺🇸 722 100 403ms 13 Dec 2022 530th greghull 721 67 31ms 9 Nov 2017 530th Natanaelel 🇸🇪 721 67 34ms 2 Nov 2021 530th D-MOVE 🇵🇭 721 67 37ms 3 Feb 2026 533rd MeWhenI 🇻🇦 721 160 1ms 21 Apr 2024 534th juliansiebert 🇩🇪 719 67 286ms 1 Aug 2022 534th IISResetMe 719 67 268ms 7 Apr 2025 536th hoodadam 717 78 10ms 31 Jan 2020 536th hiddicop 🇸🇪 717 78 10ms 31 Jan 2021 536th sleepyStick 717 78 10ms 8 Dec 2021 536th annaproxy 717 78 10ms 6 Feb 2022 536th cubed-guy 717 78 9ms 12 Feb 2022 536th Fracture17 717 78 9ms 4 Apr 2023 536th commandz0 🇺🇸 717 78 10ms 7 Apr 2023 536th steffan-polygolf 717 78 10ms 21 Feb 2024 536th Yewzir 🇧🇪 717 78 10ms 5 Jun 2024 536th jatloe 717 78 10ms 29 Oct 2024 536th snydej 717 78 11ms 21 Nov 2024 547th kg583 🇺🇸 717 106 9ms 30 Jul 2025 548th nullie 717 107 142ms 12 Mar 2025 549th duckyluuk 🇳🇱 717 161 2ms 29 Jan 2026 550th prplz 🇦🇺 716 78 1ms 26 Apr 2019 550th Attero 🇸🇪 716 78 2ms 23 May 2020 550th Alex-x90 🇺🇸 716 78 2ms 24 Jan 2023 550th JohandeRuiter 🇳🇱 716 78 2ms 30 Nov 2023 554th janbehrens 🇩🇪 716 80 4ms 28 Nov 2023 555th CatsAreFluffy 715 58 51ms 18 Feb 2023 556th thisishowmymindworks 🇳🇴 714 67 9ms 9 Sep 2020 556th itsh01 714 67 10ms 4 Sep 2022 556th inventshah 714 67 10ms 23 Jan 2023 556th Alex-x90 🇺🇸 714 67 9ms 24 Jan 2023 556th helbling 🇨🇭 714 67 12ms 3 Jun 2024 First Prev 481–560 of 2,101 Next Last