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?
Christmas Trees 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 799th shanewh1te 766 62 248ms 27 Jul 2020 799th tofuweasel 766 62 278ms 9 Jun 2022 803rd Yewzir 🇧🇪 766 88 2ms 5 Jul 2023 804th albanian-laundromat 766 102 73ms 16 Dec 2025 805th gschlect 765 89 21ms 21 Dec 2018 805th Null000 🇳🇿 765 89 9ms 6 May 2021 805th igmcdowell 765 89 12ms 28 Nov 2021 805th uttumuttu 🇫🇮 765 89 10ms 4 Jan 2022 805th Ephellon 765 89 9ms 16 Dec 2023 810th dokutan 765 99 4ms 17 Apr 2024 811th rak1507 🇬🇧 764 44 2ms 25 Feb 2022 811th DialFrost 🇸🇬 764 44 3ms 6 Feb 2024 813th AlephSquirrel 764 77 491ms 22 Jan 2024 813th Babafaba 764 77 435ms 17 Nov 2025 813th snoozingnewt 🇨🇦 764 77 437ms 13 Feb 2026 816th daedals 763 80 10ms 19 Jun 2019 816th StardustGogeta 763 80 9ms 6 Aug 2020 816th rschwa6308 🇺🇸 763 80 9ms 6 Aug 2020 816th zbreit 🇺🇸 763 80 10ms 6 Aug 2020 816th mcjo163 763 80 9ms 6 Aug 2020 816th vezzick 763 80 10ms 6 Mar 2021 816th jacklynnepenick 763 80 10ms 12 Aug 2021 816th MichaelMBradley 🇨🇦 763 80 9ms 22 Feb 2022 816th Bonjour27891 🇻🇳 763 80 11ms 15 Mar 2022 816th glesnick 763 80 10ms 17 Aug 2022 816th StefanHabel 🇨🇦 763 80 9ms 19 Nov 2022 816th SirFireball3521 763 80 9ms 25 Jan 2023 816th adamnielson42 🇺🇸 763 80 10ms 25 Aug 2023 816th keelimeguy 🇺🇸 763 80 10ms 6 Nov 2023 816th Pyroan 763 80 9ms 12 Mar 2025 816th vhoulbreque 🇫🇷 763 80 10ms 29 Nov 2025 816th Openstreetmapler 763 80 10ms 27 Jan 2026 816th carotinoid 🇰🇷 763 80 10ms 9 days ago 834th pzagrebin 762 60 53ms 8 Jul 2022 835th MeWhenI 🇻🇦 762 62 3ms 13 Aug 2024 836th dwayneparton 762 71 35ms 13 May 2020 836th aksyristos 762 71 38ms 3 Feb 2023 838th primo-ppcg 🇹🇭 762 91 6ms 22 Jan 2023 839th roguh 🇬🇹 762 117 28ms 14 Jan 2024 840th Yewzir 🇧🇪 762 151 288ms 3 Jan 2024 841st SirBogman 🇺🇸 761 43 35ms 28 Aug 2022 842nd AlephSquirrel 761 62 3ms 10 Dec 2022 843rd iznax 761 109 386ms 21 Nov 2021 843rd edwinvanschaick 761 109 375ms 25 Apr 2022 843rd MeWhenI 🇻🇦 761 109 388ms 27 Oct 2022 846th janbehrens 🇩🇪 761 123 66ms 29 Jul 2022 847th sean-niemann 🇺🇸 760 100 118ms 7 Aug 2025 848th dokutan 759 72 1,285ms 30 Aug 2025 849th MeWhenI 🇻🇦 759 102 38ms 28 Jun 2022 850th albanian-laundromat 759 118 485ms 28 Dec 2025 851st stefangimmillaro 758 89 113ms 17 Oct 2022 851st Yewzir 🇧🇪 758 89 114ms 30 Apr 2023 853rd retrohun 757 67 1ms 22 Aug 2025 854th lynn 757 92 10ms 15 Nov 2021 855th msbranicky 757 152 282ms 31 Aug 2023 855th targrik 757 152 297ms 10 Jul 2025 857th revlayle 🇺🇸 756 90 10ms 12 Feb 2021 857th didion0 🇺🇸 756 90 13ms 29 Apr 2021 857th emgordon154 756 90 6ms 21 days ago 860th Shanethegamer 🇺🇸 755 86 141ms 29 Oct 2024 861st verticallity 755 111 154ms 6 Apr 2022 862nd bac0id 755 124 441ms 28 Jan 2026 863rd KevinMarquette 🇺🇸 754 63 230ms 5 Jun 2020 863rd Yewzir 🇧🇪 754 63 235ms 9 Apr 2024 865th bizy-coder 754 78 363ms 18 Jan 2024 865th fuzzylojik-golf 🇺🇸 754 78 406ms 6 Jul 2025 867th somebody1234 754 81 9ms 16 Dec 2018 867th Andre3582 754 81 10ms 27 Oct 2020 867th fynnkroeger 754 81 10ms 20 Feb 2021 867th stordev 754 81 9ms 26 Feb 2021 867th CodyMiner 754 81 10ms 13 Nov 2021 867th vishwathg 754 81 11ms 18 Aug 2022 867th FlorianCassayre 🇫🇷 754 81 9ms 1 Nov 2022 867th 2bt 754 81 10ms 26 Jan 2024 867th Bmrl7 754 81 10ms 7 Mar 2024 867th countlpaul-dotcom 754 81 9ms 19 Oct 2025 867th andrewjc2000 754 81 9ms 13 Jan 2026 867th denkyuu1 754 81 10ms 19 days ago 879th ovs-code 🇩🇪 754 82 1ms 10 Oct 2023 880th GoateSo 754 100 1ms 18 Oct 2020 First Prev 801–880 of 3,177 Next Last