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 881st ovs-code 🇩🇪 753 98 1ms 25 Sep 2023 882nd jared-hughes 753 119 519ms 24 Sep 2025 883rd strout 752 95 118ms 16 Aug 2022 884th NewDefectus 🇮🇱 750 61 49ms 26 Jul 2021 885th Shanethegamer 🇺🇸 750 90 101ms 29 Oct 2024 886th msbranicky 749 90 2ms 12 Aug 2023 887th chunes3 🇺🇸 749 105 70ms 17 Sep 2023 888th syntax-rules 749 125 443ms 25 Dec 2022 889th yzhs 🇩🇪 748 73 1,294ms 3 Aug 2021 890th alexkunin 748 91 10ms 6 Jul 2019 890th Whalefreezer 748 91 11ms 9 May 2021 892nd Steffan153 🇫🇮 748 136 1ms 23 Jul 2024 893rd mogensen 747 154 288ms 16 Apr 2020 893rd yzzyx 747 154 293ms 21 Apr 2020 893rd tsakath 747 154 280ms 22 Apr 2020 896th AlephSquirrel 746 93 6ms 27 Nov 2025 897th Caylyn 746 101 1ms 1 Mar 2018 897th TetraPengwin 746 101 1ms 14 Dec 2021 899th MeWhenI 🇻🇦 745 99 1ms 18 Jun 2024 900th ETHproductions 🇺🇸 744 68 208ms 26 Sep 2018 901st Yewzir 🇧🇪 744 79 440ms 4 Feb 2024 901st albanian-laundromat 744 79 510ms 23 Nov 2025 903rd lrustand 744 82 9ms 5 Feb 2018 903rd bloche 744 82 9ms 22 Dec 2018 903rd RDShah 744 82 10ms 1 Feb 2020 903rd andre-lameirinhas 🇵🇹 744 82 9ms 26 Feb 2020 903rd celynw 744 82 12ms 5 Aug 2020 903rd urojony 🇵🇱 744 82 10ms 4 Jan 2021 903rd btjones0 744 82 11ms 6 Dec 2021 903rd Irratix 🇳🇱 744 82 10ms 25 Apr 2022 903rd nullie 744 82 10ms 7 Jun 2022 903rd DrPiranoid 744 82 9ms 24 Sep 2022 903rd aksyristos 744 82 10ms 18 Jan 2023 903rd badboj40 744 82 9ms 14 Feb 2023 903rd scpchicken 🇵🇼 744 82 10ms 28 Feb 2023 903rd GulgDev 744 82 9ms 22 Mar 2023 903rd cros107 🇦🇺 744 82 9ms 31 May 2023 903rd BREMAUCY 🇫🇷 744 82 10ms 11 Mar 2024 903rd imelxr 🇮🇱 744 82 9ms 17 Aug 2024 903rd nstearns96 🇬🇧 744 82 10ms 22 Oct 2024 903rd klixel 🇨🇦 744 82 10ms 8 Apr 2025 903rd bknower 744 82 9ms 26 Jun 2025 903rd KasperKivimaeki 🇫🇮 744 82 9ms 4 Oct 2025 903rd Bulmenisaurus 744 82 10ms 20 Oct 2025 903rd Andrey2001 744 82 10ms 23 Nov 2025 926th snoozingnewt 🇨🇦 743 104 151ms 26 Jan 2026 927th jared-hughes 743 126 451ms 28 Jun 2022 928th Shanethegamer 🇺🇸 742 106 67ms 16 Dec 2024 929th yokasuretsu 741 73 35ms 16 Apr 2018 930th AdrienHache 🇫🇷 741 112 459ms 13 Aug 2025 931st vidanm 🇫🇷 741 113 156ms 5 Jun 2025 932nd Shanethegamer 🇺🇸 741 118 472ms 29 Oct 2024 933rd Natanaelel 🇸🇪 740 60 112ms 26 Dec 2021 933rd Shanethegamer 🇺🇸 740 60 106ms 29 Oct 2024 935th bloche 740 92 9ms 22 Dec 2018 935th BBoehm 🇩🇪 740 92 10ms 2 Feb 2021 935th vmcnabb 🇳🇿 740 92 9ms 9 May 2021 935th Giga-Bowser 740 92 13ms 18 Dec 2021 935th BambooleanLogic 🇸🇪 740 92 10ms 7 Oct 2022 935th mobibluman 740 92 12ms 19 Oct 2022 935th itserasmus 740 92 9ms 25 Jan 2024 935th CaedenHarper 🇨🇦 740 92 9ms 24 Aug 2025 943rd frankgraziano 740 243 12ms 12 Feb 2026 944th GulgDev 739 102 1ms 22 Mar 2023 945th madex 🇩🇪 738 74 1,219ms 13 days ago 946th CLOStrophobic 🇮🇹 738 94 5ms 31 Jan 2025 947th NewDefectus 🇮🇱 738 100 2ms 22 Dec 2020 947th Irratix 🇳🇱 738 100 2ms 21 Dec 2021 947th Alex-x90 🇺🇸 738 100 2ms 24 Nov 2022 950th flawr 737 97 121ms 22 Feb 2019 950th exodrifter 🇺🇸 737 97 114ms 4 Nov 2022 952nd madeforlosers 737 105 39ms 13 Dec 2023 953rd MeWhenI 🇻🇦 736 105 3ms 14 Jul 2023 954th MeWhenI 🇻🇦 735 80 394ms 17 Jan 2024 955th lmolteno 735 83 9ms 27 Mar 2021 955th jfallon1997 735 83 10ms 6 Sep 2022 955th QuincyNash 🇺🇸 735 83 10ms 6 Dec 2022 955th smilesformiles3 735 83 10ms 12 Jun 2025 959th revlayle 🇺🇸 735 113 368ms 21 Nov 2021 960th abel465 🇳🇿 735 114 158ms 7 May 2021 First Prev 881–960 of 3,177 Next Last