The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 25 hours. Why not try and solve them ahead of time?
Cubes 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 240th weliveinhell 🇭🇹 706 134 11ms 5 Oct 2023 240th rollershutter 706 134 10ms 10 Mar 2024 243rd elgan65536 🇺🇸 700 135 10ms 3 Apr 2024 244th HumanoidCPU 700 142 393ms 5 Mar 2025 245th nwellnhof 🇩🇪 698 135 296ms 30 Dec 2021 246th nwellnhof 🇩🇪 696 119 36ms 1 Dec 2022 247th ballaire 695 136 10ms 15 Feb 2024 248th Babafaba 695 143 369ms 15 Oct 2025 249th janbehrens 🇩🇪 693 286 438ms 10 Jul 2023 250th Andriamanitra 🇫🇮 693 300 4ms 13 Jun 2024 250th dokutan 693 300 4ms 27 Sep 2024 252nd andersk 🇺🇸 687 282 151ms 4 Feb 2023 253rd Shanethegamer 🇺🇸 686 139 595ms 26 Oct 2021 254th olleicua 🇺🇸 685 121 37ms 25 Feb 2025 255th ndren 685 138 30ms 20 Jul 2025 256th luciaaibarblanco 🇪🇸 685 251 384ms 21 Nov 2021 256th tomh1012 685 251 456ms 21 Nov 2025 258th MeWhenI 🇻🇦 683 173 2ms 1 Mar 2025 259th janbehrens 🇩🇪 683 247 4ms 2 Jul 2023 260th janbehrens 🇩🇪 682 252 442ms 17 Apr 2025 261st marshallward 🇺🇸 682 302 42ms 6 May 2025 262nd albanian-laundromat 681 146 410ms 12 Sep 2025 263rd AnAwesomGuy 681 170 1,294ms 22 Sep 2025 264th lynn 680 285 144ms 9 Nov 2025 265th Yewzir 🇧🇪 679 227 9ms 18 Dec 2024 266th dokutan 678 209 74ms 23 Jan 2026 267th devoil-g 678 256 2ms 7 Oct 2024 268th Yewzir 🇧🇪 678 258 1ms 25 Mar 2024 269th JunkIce 676 147 447ms 13 Feb 2025 270th KasperKivimaeki 🇫🇮 676 281 433ms 2 Sep 2025 271st GolfingSuccess 🇬🇷 675 140 10ms 10 Oct 2020 271st gitbedd 🇬🇧 675 140 10ms 10 Jan 2022 273rd elgan65536 🇺🇸 675 287 169ms 7 Feb 2026 274th MeWhenI 🇻🇦 674 255 420ms 17 Apr 2025 275th NewDefectus 🇮🇱 673 258 2ms 5 Apr 2021 276th user189032 672 228 123ms 29 May 2019 277th sean-niemann 🇺🇸 672 295 490ms 26 Sep 2025 278th Irratix 🇳🇱 671 141 11ms 7 May 2022 278th tri1212 🇻🇳 671 141 11ms 15 Jul 2022 278th dokutan 671 141 9ms 20 Jun 2024 281st argusdusty 🇺🇸 671 305 294ms 11 Jan 2021 282nd dokutan 671 308 311ms 27 Sep 2024 283rd h3ra993huskp 🇯🇵 670 296 488ms 30 Nov 2025 284th postie77 669 257 393ms 27 Mar 2023 284th arctouch-cristiannevianna 669 257 391ms 9 Feb 2024 286th dokutan 668 286 157ms 10 Jul 2024 287th frozolotl 668 290 167ms 10 Jan 2020 288th MeWhenI 🇻🇦 667 260 41ms 6 Sep 2022 289th HumanoidCPU 666 142 11ms 5 Mar 2025 290th dokutan 666 158 119ms 28 Sep 2024 291st emgordon154 666 178 12ms 7 Aug 2024 292nd RedzGoose 🇦🇺 665 253 121ms 19 Sep 2024 293rd AnAwesomGuy 665 298 427ms 10 Jan 2026 294th antimon2 🇯🇵 662 144 1,436ms 29 Oct 2022 295th Argeento 🇵🇱 662 179 10ms 9 Oct 2020 296th Babafaba 661 143 12ms 15 Oct 2025 297th ovs-code 🇩🇪 660 263 3ms 17 Feb 2024 298th KrausRaus 🇺🇸 660 265 2ms 16 Oct 2023 299th lynn 659 124 34ms 25 Oct 2021 300th neihousaigaai 659 180 8ms 29 Apr 2021 301st tdkkdt 🇷🇺 659 261 445ms 21 Nov 2021 301st tomtheisen 🇺🇸 659 261 432ms 21 Nov 2021 303rd MeWhenI 🇻🇦 658 214 2ms 11 Nov 2022 304th neihousaigaai 658 301 432ms 30 Apr 2021 305th luciaaibarblanco 🇪🇸 654 303 429ms 17 Jan 2021 306th WhoisDavid 653 297 159ms 13 Oct 2020 307th Positronico 652 314 287ms 24 Jan 2026 308th MeWhenI 🇻🇦 652 503 13ms 28 Aug 2023 309th Jacob385 650 153 417ms 12 Apr 2024 310th Attero 🇸🇪 650 267 2ms 23 Oct 2020 311th BlankSpruce 649 293 87ms 30 Aug 2024 312th yzhs 🇩🇪 648 146 12ms 25 Oct 2020 312th albanian-laundromat 648 146 10ms 3 Apr 2025 314th ovs-code 🇩🇪 648 147 2,219ms 10 Mar 2024 315th revlayle 🇺🇸 646 266 403ms 14 Jan 2022 316th edsrzf 🇳🇿 645 317 271ms 23 Oct 2024 317th JunkIce 643 147 10ms 13 Feb 2025 318th rowan-OzRunways 643 321 92ms 14 Aug 2020 319th r-brinke 🇳🇱 642 302 180ms 9 May 2024 320th MeWhenI 🇻🇦 642 466 1,709ms 22 Apr 2024 First Prev 241–320 of 1,701 Next Last