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?
Medal Tally in all languages 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 321st LukeBridges 🇬🇧 657 152 10ms 28 Aug 2024 322nd Shanethegamer 🇺🇸 654 120 293ms 16 Jul 2023 323rd Seek64 🇩🇪 654 133 30ms 11 Jan 2026 324th mrxz 🇳🇱 653 153 11ms 23 Jun 2024 325th Babafaba 649 134 17ms 26 Oct 2025 326th helbling 🇨🇭 649 154 11ms 28 Mar 2024 327th neel11235813 648 120 633ms 29 Feb 2024 328th GolfingSuccess 🇬🇷 648 181 2ms 7 Jun 2023 329th elgan65536 🇺🇸 648 248 182ms 2 Mar 2024 330th sean-niemann 🇺🇸 645 193 421ms 14 Nov 2023 331st 5cw 🇺🇸 644 135 10ms 6 Jun 2023 332nd janbehrens 🇩🇪 643 256 526ms 11 Aug 2023 333rd Bulmenisaurus 639 136 11ms 15 Dec 2024 333rd edsrzf 🇳🇿 639 136 18ms 15 Dec 2025 335th MeWhenI 🇻🇦 637 193 1,048ms 8 Jul 2023 336th MeWhenI 🇻🇦 637 366 1,421ms 10 Feb 2025 337th arctouch-cristiannevianna 635 196 405ms 27 Jun 2023 338th kaascevich 635 226 252ms 22 Jul 2025 339th FlorianCassayre 🇫🇷 634 137 12ms 5 Aug 2025 339th ryyyn 🇺🇸 634 137 19ms 10 Dec 2025 339th Lv0Sys 🇵🇱 634 137 11ms 25 Feb 2026 342nd JDiLenarda 🇫🇷 634 241 1,261ms 11 Nov 2023 343rd Bmrl7 630 138 11ms 21 Dec 2025 344th lynn 629 70 72ms 6 Jun 2023 345th 4hg 🇺🇸 629 98 35ms 2 Feb 2024 346th Feniske 🇫🇷 628 125 340ms 16 Nov 2023 347th MeWhenI 🇻🇦 628 186 166ms 14 hours ago 348th MeWhenI 🇻🇦 628 194 462ms 8 Jul 2023 349th MeWhenI 🇻🇦 628 229 41ms 1 Feb 2024 350th Alex-x90 🇺🇸 627 187 2ms 5 Apr 2024 351st janbehrens 🇩🇪 627 197 7ms 2 Jul 2023 352nd SirBogman 🇺🇸 626 101 36ms 14 Jan 2025 353rd speles 🇺🇦 626 354 56ms 10 Nov 2023 354th annaproxy 625 139 10ms 12 Jun 2023 354th keegan-t 🇨🇦 625 139 11ms 20 Apr 2025 354th InigoK 🇺🇸 625 139 11ms 15 Aug 2025 357th janbehrens 🇩🇪 624 160 12ms 5 Jun 2023 358th CaedenHarper 🇨🇦 624 259 299ms 20 Nov 2025 359th rbertram90 🇬🇧 620 199 5ms 4 May 2025 360th Natanaelel 🇸🇪 620 226 144ms 11 Jun 2025 361st MeWhenI 🇻🇦 620 489 16ms 19 Jul 2025 362nd MeWhenI 🇻🇦 619 201 448ms 14 Aug 2023 363rd angel-p57 🇯🇵 618 393 3ms 16 Dec 2023 364th m-tkach 🇺🇦 617 126 616ms 20 Jan 2024 365th pschmid0 🇺🇸 617 200 5ms 6 Jun 2023 366th postie77 616 202 390ms 3 Jul 2023 367th ravnskjaer 🇩🇰 614 268 448ms 15 Dec 2025 368th Shanethegamer 🇺🇸 613 255 464ms 8 Jun 2023 369th SirBogman 🇺🇸 612 127 743ms 16 Jan 2024 369th xsot 🇸🇬 612 127 456ms 7 Apr 2024 371st MarcMush 🇫🇷 611 128 644ms 4 Feb 2024 372nd aksyristos 608 143 33ms 33 hours ago 373rd Flekay 🇩🇪 604 144 11ms 13 days ago 374th Chinay-Domitrix 🇺🇸 603 200 2,853ms 12 days ago 375th janlelis 602 105 38ms 24 Sep 2024 376th DialFrost 🇸🇬 599 131 331ms 21 Jun 2024 377th emgordon154 597 202 2,938ms 28 Apr 2025 378th typeswitch-dev 🇵🇹 597 272 14ms 25 Aug 2023 379th GolfingSuccess 🇬🇷 595 146 12ms 1 Jun 2023 379th KasperKivimaeki 🇫🇮 595 146 12ms 10 Jul 2025 381st Shanethegamer 🇺🇸 592 227 40ms 31 Oct 2024 382nd anter69 🇭🇺 591 107 38ms 31 Mar 2024 382nd DialFrost 🇸🇬 591 107 37ms 1 Jun 2024 384th amollberg 🇸🇪 591 147 13ms 4 Jan 2024 385th DialFrost 🇸🇬 590 150 156ms 28 Oct 2024 386th albanian-laundromat 589 396 1,433ms 28 Oct 2025 387th Shanethegamer 🇺🇸 588 152 94ms 3 Jun 2023 388th emgordon154 587 136 5ms 20 May 2025 389th celiendonze 🇨🇭 587 148 18ms 6 Jun 2023 389th luuumine 🇫🇷 587 148 12ms 22 Oct 2025 391st emgordon154 586 208 580ms 26 May 2025 392nd inventshah 583 149 11ms 23 Sep 2023 392nd JunkIce 583 149 18ms 19 Jan 2025 394th MeWhenI 🇻🇦 583 231 73ms 8 Nov 2023 395th MeWhenI 🇻🇦 582 166 13ms 18 Nov 2023 396th olleicua 🇺🇸 580 109 35ms 7 Nov 2025 397th Babafaba 580 134 397ms 26 Oct 2025 398th kmathis22 579 284 383ms 8 Dec 2025 399th MeWhenI 🇻🇦 578 203 2ms 3 Sep 2023 400th RaBa21 🇭🇺 576 151 13ms 19 Jul 2025 First Prev 321–400 of 616 Next Last