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?
Abundant Numbers (Long) in Java in chars. 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 Chars Time Submitted 1st Lydxn 🇨🇦 1,000 84 475ms 12 Dec 2025 2nd JayXon 🇺🇸 988 85 392ms 26 Sep 2025 3rd DialFrost 🇸🇬 955 88 366ms 17 Nov 2025 4th KasperKivimaeki 🇫🇮 944 89 378ms 30 Nov 2025 5th fuzzylojik-golf 🇺🇸 923 91 371ms 24 Sep 2025 5th dokutan 923 91 382ms 24 Sep 2025 5th sean-niemann 🇺🇸 923 91 375ms 24 Sep 2025 5th Shanethegamer 🇺🇸 923 91 469ms 25 Sep 2025 5th nwellnhof 🇩🇪 923 91 495ms 25 Sep 2025 5th Yewzir 🇧🇪 923 91 373ms 2 Oct 2025 5th namelessiw 923 91 410ms 4 Oct 2025 5th Yax42 🇫🇷 923 91 512ms 4 Oct 2025 5th stefangimmillaro 923 91 417ms 6 Oct 2025 5th snoozingnewt 🇨🇦 923 91 380ms 9 Oct 2025 5th CaedenHarper 🇨🇦 923 91 397ms 19 Oct 2025 5th MeWhenI 🇻🇦 923 91 382ms 7 Nov 2025 5th emgordon154 923 91 377ms 9 Feb 2026 5th Steffan153 🇫🇮 923 91 389ms 11 Feb 2026 5th raphaelimahorn 923 91 420ms 14 days ago 5th edsrzf 🇳🇿 923 91 369ms 4 days ago 5th roelderickx 923 91 388ms 3 days ago 22nd bitsandbeyond 🇳🇱 913 92 385ms 3 days ago 23rd kmathis22 903 93 364ms 23 Oct 2025 23rd ethanlally 903 93 477ms 12 Nov 2025 23rd prestosilver 🇺🇸 903 93 409ms 3 days ago 23rd error256 903 93 355ms 3 days ago 23rd tomh1012 903 93 383ms 3 days ago 23rd jkelly467 903 93 375ms 3 days ago 23rd zakariamouhid 903 93 378ms 34 hours ago 30th h3ra993huskp 🇯🇵 894 94 472ms 30 Nov 2025 31st Liibe 884 95 427ms 25 Sep 2025 31st piano-miles 884 95 405ms 24 Feb 2026 33rd Just4FunCoder 866 97 351ms 26 hours ago 34th Schmitt-Very-Cool 857 98 486ms 26 Sep 2025 35th tigerdan2 🇩🇪 848 99 398ms 30 Nov 2025 35th elgan65536 🇺🇸 848 99 409ms 19 Feb 2026 35th albanian-laundromat 848 99 386ms 4 days ago 35th Matter1024 🇮🇳 848 99 371ms 4 days ago 39th Florian-Mt 808 104 456ms 8 Jan 2026 39th blaztoma 🇱🇹 808 104 413ms 3 days ago 41st jared-hughes 800 105 394ms 24 Sep 2025 41st ravnskjaer 🇩🇰 800 105 442ms 15 Dec 2025 43rd kasarino 792 106 368ms 3 days ago 44th Protothor 757 111 383ms 3 days ago 45th rucin93 🇵🇱 724 116 368ms 3 days ago 46th janAkali 🇷🇺 689 122 389ms 4 days ago 47th mrondon8 661 127 403ms 1 Dec 2024 48th janbehrens 🇩🇪 656 128 412ms 19 Nov 2022 48th Betuaredead 656 128 434ms 7 Jan 2023 48th eMGeeneer 656 128 408ms 14 Jun 2024 48th Jacob385 656 128 347ms 1 Apr 2025 48th plastic-bottle 656 128 401ms 28 Aug 2025 53rd annaproxy 651 129 409ms 2 Jan 2023 53rd LordSir101 651 129 382ms 17 Sep 2025 53rd madex 🇩🇪 651 129 345ms 3 days ago 56th KrausRaus 🇺🇸 646 130 384ms 28 Nov 2022 57th bwat2 641 131 392ms 3 Mar 2023 57th yoshykai 641 131 403ms 26 Mar 2025 59th cbrt-x 636 132 416ms 14 Sep 2023 59th bac0id 636 132 405ms 26 Sep 2023 59th eiburns 636 132 413ms 3 Oct 2023 62nd rifatx 632 133 384ms 22 Jul 2024 63rd Omega65536 🇩🇪 622 135 404ms 23 Nov 2022 63rd Leftykap 622 135 413ms 27 Nov 2022 63rd jhpaques 🇫🇷 622 135 416ms 25 Feb 2023 63rd Apataras 622 135 410ms 10 Jul 2025 63rd Emutis 🇱🇹 622 135 327ms 3 days ago 68th astdefu 618 136 396ms 13 Dec 2022 69th OriEy 613 137 414ms 27 Apr 2023 70th Pyro569 604 139 410ms 20 Jul 2023 70th riviere-lucas 604 139 400ms 12 Jan 2024 70th msbranicky 604 139 342ms 3 days ago 73rd bidger 600 140 398ms 13 Dec 2022 73rd althryenix 600 140 413ms 18 Jan 2023 73rd crizin 🇰🇷 600 140 398ms 9 Sep 2023 76th AstroOrbis 596 141 381ms 3 days ago 77th MrGagnonHPS 583 144 407ms 15 Oct 2023 78th Techdude01 575 146 397ms 26 Nov 2022 79th aDwarfNamedUrist 568 148 385ms 30 Aug 2023 80th luca1339 560 150 410ms 7 Jun 2024 1–80 of 101 Next Last
