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?
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 557th helbling 🇨🇭 714 67 12ms 3 Jun 2024 562nd GalladeGuy 🇺🇸 714 91 1ms 12 Apr 2019 562nd Waffle3z 714 91 2ms 24 Oct 2020 564th BREMAUCY 🇫🇷 713 75 447ms 1 Nov 2025 565th chunes3 🇺🇸 713 100 67ms 17 Sep 2023 566th JOrE20 713 219 7ms 30 Nov 2025 567th janbehrens 🇩🇪 713 352 11ms 2 Aug 2023 568th Shanethegamer 🇺🇸 712 97 80ms 25 Oct 2022 569th emgordon154 712 179 1,439ms 11 Jul 2025 570th Natanaelel 🇸🇪 711 45 2ms 21 Jan 2022 570th Natanaelel 🇸🇪 711 45 36ms 22 Jan 2024 572nd emgordon154 711 68 35ms 19 Nov 2025 573rd Sp3000 🇦🇺 710 57 3ms 12 Jan 2024 574th Attero 🇸🇪 710 69 6ms 20 Sep 2023 575th thisishowmymindworks 🇳🇴 708 79 9ms 5 Oct 2020 575th SnowballSH 708 79 10ms 4 Mar 2021 575th NewDefectus 🇮🇱 708 79 10ms 9 Nov 2021 575th fourth-bit 708 79 10ms 23 Sep 2024 575th Pyroan 708 79 9ms 22 Feb 2025 575th wuduculfre 708 79 10ms 22 Jul 2025 575th cros107 🇦🇺 708 79 10ms 6 Dec 2025 582nd flawr 708 97 115ms 24 Feb 2019 583rd prestosilver 🇺🇸 708 102 405ms 15 Jan 2026 584th bluebear94 707 63 106ms 12 Feb 2018 585th buddy1616 707 79 1ms 26 Apr 2019 585th ktiy 707 79 2ms 2 Jun 2021 585th m-tkach 🇺🇦 707 79 2ms 15 Dec 2022 588th stefangimmillaro 705 100 414ms 6 Oct 2025 589th cywong-amino 🇭🇰 704 68 12ms 30 May 2020 589th dmrichwa 🇺🇸 704 68 9ms 22 Jan 2023 589th kcinnu 🇱🇹 704 68 11ms 15 Nov 2023 592nd SirBogman 🇺🇸 704 76 488ms 16 Jan 2024 593rd edsrzf 🇳🇿 703 108 9ms 8 Jan 2025 594th Ripick 701 103 325ms 21 May 2023 595th SirBogman 🇺🇸 701 358 11ms 23 Nov 2022 596th MeWhenI 🇻🇦 700 70 4ms 3 Jul 2023 597th yzhs 🇩🇪 699 80 9ms 6 Sep 2020 597th namelessiw 699 80 9ms 6 May 2024 599th s-g-stavely 699 93 1ms 12 May 2021 600th Shanethegamer 🇺🇸 699 94 1,301ms 9 Mar 2023 601st Feniske 🇫🇷 698 69 266ms 10 Nov 2023 602nd foxmcloud555 698 80 2ms 28 Apr 2022 602nd aksyristos 698 80 2ms 10 Feb 2023 602nd neel11235813 698 80 1ms 14 Mar 2023 602nd klixel 🇨🇦 698 80 1ms 7 Jun 2023 602nd Herbert00709 🇵🇱 698 80 2ms 23 Nov 2024 602nd TeodorDyakov 🇧🇬 698 80 1ms 23 Sep 2025 608th MeWhenI 🇻🇦 698 85 2,698ms 27 Oct 2024 608th pardouin 🇫🇷 698 85 2,690ms 12 Nov 2024 608th aditsu 698 85 2,826ms 13 Aug 2025 611th Shanethegamer 🇺🇸 697 109 6ms 19 Dec 2023 612th emgordon154 697 118 104ms 5 Dec 2025 613th DialFrost 🇸🇬 696 65 1,944ms 31 Dec 2023 614th steffan-polygolf 695 51 40ms 21 Feb 2024 615th janbehrens 🇩🇪 695 154 25ms 8 Jul 2021 616th commandz0 🇺🇸 694 77 526ms 15 Jan 2024 616th snoozingnewt 🇨🇦 694 77 420ms 13 Feb 2026 618th kritixilithos 692 76 1ms 27 May 2024 619th MeWhenI 🇻🇦 692 103 70ms 2 Nov 2023 620th cure-honey 🇯🇵 692 111 120ms 10 Jul 2021 621st TheZwierzLF 🇵🇱 690 70 36ms 21 Dec 2025 622nd argusdusty 🇺🇸 690 81 10ms 31 Dec 2020 622nd scpchicken 🇵🇼 690 81 11ms 13 Mar 2022 622nd mathb0y512 690 81 10ms 24 Nov 2022 622nd Bulmenisaurus 690 81 10ms 5 Jan 2025 622nd InigoK 🇺🇸 690 81 10ms 22 Sep 2025 622nd Emutis 🇱🇹 690 81 10ms 18 Dec 2025 628th janbehrens 🇩🇪 689 62 3ms 28 Nov 2023 629th Shanethegamer 🇺🇸 688 99 35ms 14 Jun 2022 630th typeswitch-dev 🇵🇹 688 103 3ms 28 Jul 2023 631st bforte 686 100 113ms 21 Dec 2018 632nd cure-honey 🇯🇵 685 66 266ms 15 Jul 2021 632nd MeWhenI 🇻🇦 685 66 243ms 15 Feb 2023 634th steffan-polygolf 685 78 465ms 7 Mar 2024 635th ian-h-chamberlain 🇺🇸 685 112 159ms 16 Jan 2020 635th stefangimmillaro 685 112 123ms 16 Nov 2024 635th emgordon154 685 112 259ms 10 Sep 2025 638th XenThe 🇬🇧 684 70 10ms 14 Jun 2025 639th Shanethegamer 🇺🇸 684 95 2ms 23 Jul 2021 640th Shanethegamer 🇺🇸 683 107 452ms 4 Jan 2022 First Prev 561–640 of 2,102 Next Last