The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Calendar 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 retrohun 422 172 16ms 31 Dec 2025 322nd NameRandomString 414 397 12ms 3 days ago 323rd Maashau 410 385 3ms 29 Dec 2025 324th nate8nate 407 483 6ms 11 May 2025 325th FlorianCassayre 🇫🇷 393 185 18ms 30 Jan 2026 326th Andrey2001 391 186 15ms 1 Feb 2026 327th CaedenHarper 🇨🇦 383 266 1,126ms 27 Dec 2025 328th RaBa21 🇭🇺 378 192 16ms 14 Feb 2026 329th Andrey2001 376 186 514ms 28 Jan 2026 330th JOrE20 373 673 299ms 25 Feb 2026 331st yibotongxue 356 204 16ms 20 Sep 2025 332nd Macweese 352 512 2,996ms 1 Jan 2026 333rd LostSyntax21 🇬🇧 346 210 15ms 30 Dec 2025 334th JOrE20 342 241 329ms 27 Dec 2025 335th zyc-2024 🇨🇳 327 222 16ms 4 Jan 2026 336th WalrusesAreAwesome 325 486 4ms 18 Feb 2026 337th guilhem-roy 🇫🇷 291 250 11ms 26 days ago 338th JesseNoEyes 🇺🇸 283 257 16ms 15 Jan 2026 339th solisolu 281 259 14ms 21 days ago 340th kevinnaviapaiva 280 474 16ms 1 Feb 2026 341st dokutan 265 537 458ms 14 Feb 2026 342nd dokutan 259 393 929ms 3 Feb 2026 343rd dokutan 250 626 462ms 3 Feb 2026 344th Msleizak 🇫🇷 244 337 325ms 9 Jan 2026 345th JOrE20 235 1,000 57ms 25 Dec 2025 346th johannes-looney-lizard 216 724 400ms 25 Apr 2025 347th 4ndyJ 🇬🇧 214 339 17ms 1 Jan 2026 348th CatsAreFluffy 208 350 273ms 2 Jan 2026 349th isenschmid 207 397 324ms 11 days ago 350th dokutan 202 915 125ms 3 Feb 2026 351st CheeseCake628 🇳🇴 191 381 20ms 12 Jan 2026 352nd snoozingnewt 🇨🇦 182 868 4ms 4 Oct 2025 353rd CheeseCake628 🇳🇴 181 387 712ms 2 Jan 2026 354th dokutan 170 1,057 79ms 3 Feb 2026 355th dokutan 159 1,420 9ms 15 days ago 356th dokutan 149 1,057 3ms 3 Feb 2026 357th aksyristos 142 603 40ms 27 Dec 2025 358th fantaize 141 1,783 236ms 19 days ago 359th JOrE20 114 1,599 3ms 25 Feb 2026 360th JOrE20 112 1,806 140ms 1 Jan 2026 361st AstroOrbis 80 905 12ms 1 Feb 2026 362nd dokutan 0 83 70ms 23 days ago 362nd snoozingnewt 🇨🇦 0 83 65ms 22 days ago 364th 2bular 0 84 97ms 20 Dec 2025 365th ovs-code 🇩🇪 0 90 14ms 2 Nov 2025 366th GolfingSuccess 🇬🇷 0 102 67ms 5 Feb 2025 367th masikoijo 0 179 7ms 26 Feb 2026 368th dokutan 0 201 72ms 8 Feb 2026 First Prev 321–368 of 368
