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?
United States 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 481st c0d3-4-F00d 🇩🇪 663 154 2ms 4 Jul 2021 481st kkoenig 663 154 2ms 4 Jan 2024 483rd SirBogman 🇺🇸 661 185 64ms 3 Jan 2022 484th jared-hughes 656 126 35ms 16 Jul 2022 485th b10011 🇫🇮 656 160 10ms 7 Jan 2023 486th billings7 🇬🇧 656 164 479ms 21 Nov 2021 486th Yax42 🇫🇷 656 164 474ms 20 Jan 2025 488th tatzyr 🇯🇵 655 115 37ms 23 Dec 2024 489th aliakseikalosha 652 165 418ms 6 Sep 2023 490th SirBogman 🇺🇸 651 207 670ms 21 May 2020 491st SirBogman 🇺🇸 649 94 4ms 2 Sep 2022 492nd MeWhenI 🇻🇦 649 175 5ms 2 Oct 2022 493rd nwellnhof 🇩🇪 646 128 34ms 4 Oct 2020 494th janbehrens 🇩🇪 646 155 6ms 16 Jul 2022 495th dokutan 645 148 395ms 4 Feb 2025 496th MeWhenI 🇻🇦 645 149 2ms 31 Aug 2021 497th CaedenHarper 🇨🇦 645 167 424ms 16 Oct 2025 498th SirBogman 🇺🇸 644 211 15ms 6 Oct 2025 499th MeWhenI 🇻🇦 644 238 2ms 10 Sep 2022 500th annaproxy 640 164 11ms 7 Jul 2022 501st UnderKoen 🇳🇱 639 219 4ms 19 Aug 2024 502nd primo-ppcg 🇹🇭 638 102 37ms 4 Feb 2023 503rd stefangimmillaro 637 169 462ms 26 Sep 2023 504th thehylian 636 165 16ms 29 Dec 2022 505th SirBogman 🇺🇸 635 158 12ms 5 Oct 2020 506th janAkali 🇷🇺 634 179 390ms 17 days ago 507th typeswitch-dev 🇵🇹 634 225 6ms 31 Jul 2023 508th arctouch-cristiannevianna 633 170 461ms 3 Jul 2023 509th msbranicky 633 248 2ms 12 Oct 2023 510th DialFrost 🇸🇬 632 116 1,022ms 26 Feb 2025 511th MarcMush 🇫🇷 632 151 312ms 2 Feb 2024 512th bricknellj 632 166 12ms 22 Jul 2022 513th MeWhenI 🇻🇦 632 202 4ms 23 May 2023 514th CaedenHarper 🇨🇦 630 214 778ms 3 Oct 2025 515th pde-bakk 🇳🇱 629 167 13ms 1 Nov 2023 515th moustave 629 167 10ms 15 Apr 2025 517th snoozingnewt 🇨🇦 626 150 507ms 20 Feb 2026 518th m-tkach 🇺🇦 626 172 484ms 31 Jul 2022 519th dokutan 625 168 10ms 11 Sep 2025 520th iakolzin 624 196 59ms 5 Jul 2022 521st Lv0Sys 🇵🇱 621 169 10ms 30 May 2025 521st LostSyntax21 🇬🇧 621 169 10ms 5 Jul 2025 523rd SirBogman 🇺🇸 620 183 387ms 17 Oct 2020 524th elgan65536 🇺🇸 620 261 348ms 5 Mar 2024 525th m-tkach 🇺🇦 619 165 2ms 31 Jul 2022 526th SirBogman 🇺🇸 612 167 2ms 2 Jan 2022 527th janbehrens 🇩🇪 612 176 439ms 16 Jul 2022 528th Secozzi 610 172 10ms 20 Oct 2020 528th ZakkkkAttackkkk 🇵🇭 610 172 10ms 13 Aug 2022 528th qpwoeirut 610 172 10ms 4 Jul 2025 531st dokutan 610 177 4,042ms 21 Mar 2025 532nd SirBogman 🇺🇸 610 391 12ms 23 Nov 2022 533rd enbyte 607 173 10ms 11 Jun 2021 534th MeWhenI 🇻🇦 607 235 5ms 21 Jul 2023 535th dokutan 603 104 73ms 11 Sep 2025 536th dokutan 602 275 2,162ms 2 Nov 2025 537th KatieLG 🇬🇧 601 179 442ms 28 Apr 2024 538th dokutan 601 189 218ms 28 Mar 2025 539th Natanaelel 🇸🇪 600 175 10ms 30 Jul 2023 540th dokutan 599 225 500ms 24 Sep 2025 541st Natanaelel 🇸🇪 598 126 35ms 12 days ago 542nd MeWhenI 🇻🇦 595 139 1,160ms 15 Sep 2025 543rd BambooleanLogic 🇸🇪 590 170 11ms 4 Jul 2023 543rd peeveen 🇬🇧 590 170 13ms 8 Aug 2023 545th dokutan 587 160 536ms 11 Sep 2025 546th Lv0Sys 🇵🇱 582 164 313ms 3 Dec 2025 547th aksyristos 580 130 35ms 29 Jan 2023 548th thisishowmymindworks 🇳🇴 580 173 13ms 15 Jun 2024 549th SirBogman 🇺🇸 579 221 143ms 23 Jul 2022 550th emgordon154 578 177 166ms 28 Jan 2025 551st MeWhenI 🇻🇦 576 241 40ms 6 Jun 2023 552nd FoxInTheClouds 574 183 10ms 4 Feb 2026 553rd aksyristos 571 179 2ms 26 Oct 2022 554th yzhs 🇩🇪 570 302 129ms 2 Jul 2022 555th Just4FunCoder 567 133 41ms 24 Sep 2025 556th frosster 🇨🇦 567 246 2ms 21 Mar 2025 557th MeWhenI 🇻🇦 566 115 51ms 18 Aug 2022 558th 2bular 565 108 3ms 4 Jul 2025 559th error256 563 198 76ms 4 Jul 2024 560th SirBogman 🇺🇸 560 179 82ms 10 Feb 2020 First Prev 481–560 of 1,428 Next Last
