The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Abundant Numbers 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 JayXon 🇺🇸 1,000 76 615ms 24 Sep 2025 1st sean-niemann 🇺🇸 1,000 76 359ms 24 Sep 2025 1st Lydxn 🇨🇦 1,000 76 448ms 12 Dec 2025 1st Steffan153 🇫🇮 1,000 76 376ms 7 days ago 5th namelessiw 987 77 516ms 4 Oct 2025 5th stefangimmillaro 987 77 491ms 6 Oct 2025 5th MeWhenI 🇻🇦 987 77 474ms 7 Nov 2025 8th nwellnhof 🇩🇪 874 87 456ms 25 Sep 2025 8th DialFrost 🇸🇬 874 87 423ms 17 Nov 2025 10th ScottHamper 864 88 501ms 30 Nov 2025 11th KasperKivimaeki 🇫🇮 854 89 452ms 30 Nov 2025 12th fuzzylojik-golf 🇺🇸 835 91 446ms 24 Sep 2025 12th dokutan 835 91 398ms 24 Sep 2025 12th Shanethegamer 🇺🇸 835 91 478ms 25 Sep 2025 12th Yewzir 🇧🇪 835 91 376ms 2 Oct 2025 12th snoozingnewt 🇨🇦 835 91 482ms 9 Oct 2025 12th CaedenHarper 🇨🇦 835 91 445ms 19 Oct 2025 12th h3ra993huskp 🇯🇵 835 91 476ms 30 Nov 2025 12th emgordon154 835 91 370ms 9 Feb 2026 12th raphaelimahorn 835 91 377ms 12 days ago 21st kmathis22 817 93 473ms 23 Oct 2025 21st ethanlally 817 93 459ms 12 Nov 2025 23rd Liibe 809 94 449ms 25 Sep 2025 23rd piano-miles 809 94 423ms 27 days ago 25th Schmitt-Very-Cool 784 97 472ms 26 Sep 2025 26th elgan65536 🇺🇸 776 98 365ms 19 Feb 2026 27th tigerdan2 🇩🇪 768 99 436ms 30 Nov 2025 27th Matter1024 🇮🇳 768 99 345ms 28 hours ago 29th jared-hughes 731 104 504ms 24 Sep 2025 29th ravnskjaer 🇩🇰 731 104 431ms 15 Dec 2025 31st kasarino 724 105 370ms 37 hours ago 32nd primo-ppcg 🇹🇭 673 113 390ms 29 Apr 2020 33rd prplz 🇦🇺 667 114 412ms 4 Jul 2020 34th CarterStroik 644 118 522ms 13 Nov 2025 35th mrondon8 618 123 399ms 25 Jan 2022 36th Attero 🇸🇪 594 128 377ms 24 Apr 2020 36th janbehrens 🇩🇪 594 128 404ms 23 Jul 2020 36th xkacer 🇨🇿 594 128 451ms 25 Jan 2021 36th Irratix 🇳🇱 594 128 407ms 6 Mar 2021 36th Re-Adventures 🇮🇳 594 128 418ms 7 Mar 2021 36th inventshah 594 128 418ms 20 Apr 2021 36th neihousaigaai 594 128 418ms 8 May 2021 36th shellbertt 🇨🇦 594 128 402ms 17 Nov 2021 36th annaproxy 594 128 412ms 2 Jan 2023 36th Betuaredead 594 128 423ms 7 Jan 2023 36th eMGeeneer 594 128 407ms 14 Jun 2024 36th Jacob385 594 128 395ms 1 Apr 2025 36th plastic-bottle 594 128 402ms 28 Aug 2025 36th Imsmelkov 594 128 401ms 22 Jan 2026 50th loganmacdougall 🇨🇦 589 129 381ms 6 Nov 2021 51st KrausRaus 🇺🇸 585 130 385ms 21 Mar 2021 51st bwat2 585 130 381ms 21 Apr 2022 51st bac0id 585 130 381ms 26 Sep 2023 51st Rohit-Lall 585 130 388ms 26 Feb 2024 51st yoshykai 585 130 399ms 30 Mar 2025 51st derekmc 585 130 410ms 4 Sep 2025 57th boxjelly 580 131 394ms 24 Feb 2021 57th jojo-mo 580 131 381ms 7 Dec 2021 57th Luca2812 580 131 407ms 12 Jan 2022 57th FlorianGoeth 580 131 380ms 15 Mar 2022 61st cbrt-x 576 132 390ms 14 Aug 2021 61st rifatx 576 132 379ms 22 Jul 2024 63rd lukehewittvandy 571 133 408ms 16 Jun 2020 63rd 77Tigers 571 133 413ms 8 Mar 2021 63rd na0y 571 133 355ms 20 Oct 2021 66th jhpaques 🇫🇷 567 134 396ms 25 Feb 2023 66th arctouch-cristiannevianna 567 134 411ms 25 Sep 2023 66th Emutis 🇱🇹 567 134 326ms 28 hours ago 69th Joe0 563 135 406ms 22 Apr 2020 69th eecb 563 135 409ms 24 Nov 2020 69th Kusarr 563 135 392ms 17 Dec 2020 69th riviere-lucas 563 135 402ms 30 Dec 2020 69th louisbosqui 563 135 382ms 30 Dec 2020 69th PhysicDev 🇫🇷 563 135 369ms 10 Jun 2021 69th CrunchyNapkin5 563 135 376ms 25 Aug 2021 69th JC-ProgJava 563 135 397ms 20 Dec 2021 69th lukashert 563 135 378ms 10 Nov 2022 69th astdefu 563 135 419ms 13 Dec 2022 69th Apataras 563 135 426ms 30 Jun 2025 80th ldoodle 559 136 376ms 12 Feb 2021 1–80 of 150 Next Last
