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?
Multitap Input 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 241st GolfingSuccess 🇬🇷 602 124 16ms 21 Jan 2026 242nd 5cw 🇺🇸 598 125 17ms 6 Feb 2026 243rd CaedenHarper 🇨🇦 598 238 321ms 9 Feb 2026 244th MeWhenI 🇻🇦 594 116 437ms 3 Feb 2026 245th bac0id 594 130 3ms 31 Jan 2026 246th alexsave 591 141 10ms 27 Feb 2026 247th bitsandbeyond 🇳🇱 589 91 38ms 24 Jan 2026 248th FoxInTheClouds 588 127 16ms 30 Jan 2026 248th LostSyntax21 🇬🇧 588 127 16ms 21 Feb 2026 250th madex 🇩🇪 585 132 3ms 31 Jan 2026 251st bricknellj 584 128 15ms 21 Jan 2026 252nd Protothor 583 143 10ms 22 Feb 2026 253rd duckyluuk 🇳🇱 579 119 413ms 10 Feb 2026 254th stefangimmillaro 579 129 16ms 14 Jan 2026 255th CaedenHarper 🇨🇦 576 214 394ms 9 Feb 2026 256th rucin93 🇵🇱 575 130 15ms 20 Jan 2026 257th bitsandbeyond 🇳🇱 572 135 3ms 26 Jan 2026 258th SirBogman 🇺🇸 570 131 17ms 26 Jan 2026 259th cros107 🇦🇺 566 132 16ms 4 Feb 2026 259th StefanHabel 🇨🇦 566 132 15ms 6 days ago 261st madex 🇩🇪 563 253 278ms 31 Jan 2026 262nd Lv0Sys 🇵🇱 562 133 16ms 21 Feb 2026 263rd h3ra993huskp 🇯🇵 561 220 357ms 1 Feb 2026 264th Waffle3z 557 183 3ms 27 Feb 2026 265th LostSyntax21 🇬🇧 557 349 9ms 21 Feb 2026 266th Natanaelel 🇸🇪 552 133 416ms 26 Jan 2026 267th prestosilver 🇺🇸 551 140 3ms 2 Feb 2026 268th Shanethegamer 🇺🇸 549 128 421ms 6 Dec 2025 269th UnderKoen 🇳🇱 545 287 7ms 2 days ago 270th Program-Pi 535 156 12ms 20 days ago 271st madex 🇩🇪 534 140 16ms 31 Jan 2026 272nd weliveinhell 🇭🇹 531 157 10ms 14 Feb 2026 273rd Heathcorp 🇦🇺 529 146 2ms 10 Feb 2026 274th souta-1326 526 142 15ms 19 Feb 2026 275th JRaspass 🇬🇧 525 96 3ms 1 Feb 2026 276th Lv0Sys 🇵🇱 525 102 40ms 21 Feb 2026 277th dokutan 525 355 104ms 7 days ago 278th ahmetdemirag 🇨🇾 522 143 10ms 27 Jan 2026 278th solisolu 522 143 16ms a min ago 280th Chinay-Domitrix 🇺🇸 521 170 2,758ms 25 days ago 281st CaedenHarper 🇨🇦 518 197 448ms 9 Feb 2026 282nd qrakhen 515 198 416ms 26 Feb 2026 283rd retrohun 513 143 4ms 31 Jan 2026 284th MeWhenI 🇻🇦 510 144 23ms 21 Dec 2025 285th tomh1012 508 147 11ms 25 Feb 2026 286th jared-hughes 508 164 10ms 9 Feb 2026 287th ZakkkkAttackkkk 🇵🇭 505 148 19ms 4 Feb 2026 288th dokutan 505 165 10ms 26 Jan 2026 289th Shanethegamer 🇺🇸 505 168 10ms 6 Dec 2025 290th evnu 502 153 94ms 9 Feb 2026 291st amazingalek 🇳🇴 502 203 409ms 26 Jan 2026 292nd dokutan 499 154 76ms 26 Jan 2026 293rd IISResetMe 497 115 373ms 27 days ago 294th KasperKivimaeki 🇫🇮 495 151 16ms 14 Jan 2026 295th Shanethegamer 🇺🇸 493 135 143ms 6 Dec 2025 296th jatloe 491 152 10ms 6 Feb 2026 297th janAkali 🇷🇺 489 205 406ms 2 days ago 298th TheSecondComing123 488 153 10ms 27 Feb 2026 299th bpharaldsson 488 209 434ms 17 Feb 2026 300th bitsandbeyond 🇳🇱 485 154 16ms 24 Jan 2026 300th andrewjc2000 485 154 11ms 27 Jan 2026 302nd CaedenHarper 🇨🇦 484 143 861ms 4 Feb 2026 303rd dokutan 483 245 12ms 4 Feb 2026 304th qpwoeirut 479 156 11ms 29 Jan 2026 305th Yax42 🇫🇷 479 174 12ms 21 Jan 2026 306th Shanethegamer 🇺🇸 478 112 42ms 6 Dec 2025 307th albanian-laundromat 477 280 30ms 30 Jan 2026 308th KatieLG 🇬🇧 477 328 22ms 26 days ago 309th BambooleanLogic 🇸🇪 474 176 11ms 21 days ago 310th netfri25 🇮🇱 470 159 11ms 23 Feb 2026 311th a6166231 🇨🇳 468 178 12ms 11 Feb 2026 312th SuperFola 465 401 51ms 3 Feb 2026 313th Skellybob56 459 222 395ms 26 Feb 2026 314th FortuiteMan 🇫🇷 458 163 16ms 1 Feb 2026 315th YAJUE114514 450 166 12ms 22 days ago 316th bpharaldsson 442 169 11ms 16 Feb 2026 317th HumanoidCPU 437 171 21ms 18 Jan 2026 317th scpchicken 🇵🇼 437 171 11ms 27 Jan 2026 317th CaedenHarper 🇨🇦 437 171 12ms 4 Feb 2026 320th dokutan 436 220 64ms 1 Feb 2026 First Prev 241–320 of 421 Next Last