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 321st emplv 🇱🇻 830 59 7ms 2 Jul 2023 322nd CLOStrophobic 🇮🇹 830 91 10ms 4 Mar 2025 323rd stefangimmillaro 826 82 103ms 10 Jan 2026 324th andersk 🇺🇸 825 93 142ms 1 Nov 2022 325th GrayJoKing 🇦🇺 824 140 1ms 6 Dec 2020 326th edsrzf 🇳🇿 824 150 32ms 6 days ago 327th MeWhenI 🇻🇦 823 56 1,230ms 12 May 2023 327th rucin93 🇵🇱 823 56 1,200ms 11 Jul 2024 327th pardouin 🇫🇷 823 56 1,577ms 11 Aug 2025 330th GrayJoKing 🇦🇺 823 65 454ms 16 Jan 2024 331st GrayJoKing 🇦🇺 823 79 1ms 23 Jan 2023 332nd ovs-code 🇩🇪 822 55 238ms 9 May 2024 333rd TFeld00 🇩🇰 822 68 9ms 19 Oct 2020 333rd HETHAT 🇩🇿 822 68 10ms 4 Mar 2021 333rd StefanHabel 🇨🇦 822 68 10ms 20 Apr 2024 333rd bzijlema 🇳🇱 822 68 10ms 15 Nov 2024 333rd CornerMercury 🇬🇧 822 68 10ms 24 Dec 2025 333rd Flekay 🇩🇪 822 68 10ms 26 days ago 333rd snoozingnewt 🇨🇦 822 68 10ms 26 days ago 340th bendiscz 822 120 285ms 18 Apr 2020 341st nwellnhof 🇩🇪 821 39 34ms 1 Oct 2021 342nd emplv 🇱🇻 821 68 2ms 31 May 2022 343rd somebody1234 821 92 7ms 19 May 2018 344th MeWhenI 🇻🇦 820 82 111ms 17 Nov 2022 345th Kacarott 🇦🇺 820 87 62ms 9 Dec 2025 346th janlelis 819 59 35ms 5 Jan 2020 346th prplz 🇦🇺 819 59 35ms 5 Jun 2020 346th KatieLG 🇬🇧 819 59 35ms 19 Oct 2021 346th jared-hughes 819 59 35ms 12 Sep 2022 346th GrayJoKing 🇦🇺 819 59 31ms 21 Jan 2023 351st HPWiz 🇳🇿 817 84 114ms 20 Oct 2020 352nd GrayJoKing 🇦🇺 816 94 7ms 4 Feb 2025 353rd emplv 🇱🇻 812 70 148ms 28 Mar 2025 354th inventshah 812 90 57ms 11 Dec 2025 355th xem 811 59 10ms 8 Oct 2018 356th cure-honey 🇯🇵 811 132 25ms 9 Jul 2021 356th JOrE20 811 132 27ms 15 Feb 2026 358th AlexDaniel 🇪🇪 810 55 114ms 21 Feb 2018 359th MeWhenI 🇻🇦 810 69 10ms 29 Nov 2021 359th neel11235813 810 69 11ms 21 Feb 2023 359th CaedenHarper 🇨🇦 810 69 9ms 29 Jul 2025 359th ImpressedByRocks 810 69 10ms 6 Sep 2025 363rd emplv 🇱🇻 810 83 121ms 22 Jan 2023 363rd Yewzir 🇧🇪 810 83 113ms 28 Mar 2024 365th ovs-code 🇩🇪 810 88 69ms 17 Sep 2023 366th stefangimmillaro 809 57 1,469ms 10 Jan 2023 367th lynn 808 95 122ms 10 Mar 2022 368th emplv 🇱🇻 808 122 282ms 26 Jan 2022 368th stefangimmillaro 808 122 286ms 18 May 2024 370th sisyphus-ppcg 🇦🇺 807 92 3ms 6 Feb 2023 370th ovs-code 🇩🇪 807 92 3ms 7 Feb 2023 370th DialFrost 🇸🇬 807 92 3ms 3 Feb 2025 373rd steffan-polygolf 806 80 3ms 21 Feb 2024 374th SirBogman 🇺🇸 805 60 33ms 4 Dec 2022 375th Yax42 🇫🇷 805 80 378ms 27 Jan 2026 376th rucin93 🇵🇱 802 74 2,428ms 20 Nov 2024 377th GrayJoKing 🇦🇺 802 90 120ms 5 Apr 2023 378th edre 799 70 10ms 6 May 2018 379th MeWhenI 🇻🇦 799 96 7ms 1 Jan 2025 380th Shanethegamer 🇺🇸 799 111 24ms 2 Mar 2023 381st sisyphus-ppcg 🇦🇺 798 60 9ms 23 Jan 2023 382nd duckyluuk 🇳🇱 798 67 401ms 5 Apr 2024 383rd MeWhenI 🇻🇦 797 78 87ms 12 Dec 2022 384th anter69 🇭🇺 795 58 1,450ms 22 Feb 2024 385th BlankSpruce 795 92 64ms 12 Aug 2022 385th zygoloid 795 92 59ms 6 Aug 2024 385th snyderek 🇺🇸 795 92 62ms 6 Aug 2024 385th tailorspy 795 92 54ms 9 Aug 2024 389th MarcMush 🇫🇷 794 57 298ms 13 Jan 2022 390th primo-ppcg 🇹🇭 794 74 160ms 25 Dec 2020 391st Shanethegamer 🇺🇸 792 61 39ms 20 Aug 2021 392nd m-tkach 🇺🇦 792 112 30ms 5 Jan 2024 393rd MeWhenI 🇻🇦 791 54 3ms 26 May 2023 394th Shanethegamer 🇺🇸 791 85 111ms 25 Oct 2022 395th steffan-polygolf 791 96 8ms 21 Feb 2024 396th sisyphus-ppcg 🇦🇺 790 62 5ms 22 Jan 2023 397th arjanadriaanse 🇳🇱 789 87 113ms 9 Feb 2022 398th ovs-code 🇩🇪 789 90 489ms 8 Mar 2022 399th marcin7Cd 788 71 9ms 27 Dec 2020 399th OwPowell 788 71 10ms 18 Dec 2023 First Prev 321–400 of 2,101 Next Last