The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. 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 561st Natanaelel 🇸🇪 483 190 3ms 20 May 2022 562nd commandz0 🇺🇸 483 206 572ms 1 Sep 2025 563rd emgordon154 483 229 1,292ms 31 Jul 2024 564th TheZwierzLF 🇵🇱 482 172 35ms 18 Dec 2025 565th jascotm 482 196 9ms 21 May 2021 566th dokutan 482 246 10ms 27 Sep 2024 567th ericlangedijk 🇸🇮 482 357 396ms 14 Mar 2022 568th AkashTandon167 482 360 3ms 13 Nov 2019 569th hjo33 481 425 306ms 24 Aug 2022 570th wobblybits 480 197 11ms 14 Aug 2025 570th FortuiteMan 🇫🇷 480 197 10ms 12 Dec 2025 572nd edsrzf 🇳🇿 480 309 7ms 21 Dec 2024 573rd philippths 480 413 427ms 5 Apr 2023 574th dokutan 479 397 60ms 29 Apr 2024 575th MeWhenI 🇻🇦 478 220 182ms 3 Aug 2024 576th dokutan 478 402 14ms 20 Apr 2025 577th cypyr 477 198 9ms 8 Aug 2024 578th Laksen 🇩🇰 477 518 27ms 9 Jul 2021 579th aksyristos 476 174 36ms 12 Feb 2023 580th Andrey2001 476 209 577ms 26 Nov 2025 581st MeWhenI 🇻🇦 476 256 1,021ms 2 Oct 2024 582nd rschwa6308 🇺🇸 475 199 10ms 16 Nov 2019 582nd Troon 475 199 11ms 23 Oct 2022 582nd Lwi-Sandwich 475 199 10ms 22 Apr 2024 582nd andrewjc2000 475 199 10ms 8 Jul 2025 586th edsrzf 🇳🇿 475 308 42ms 11 Feb 2025 587th astdefu 475 400 79ms 8 Dec 2022 588th lucacrose 🇺🇸 474 307 2ms 20 Sep 2023 589th decorator-factory 473 200 10ms 27 May 2019 589th andre-lameirinhas 🇵🇹 473 200 10ms 26 Jul 2022 589th betaveros 473 200 10ms 31 Dec 2022 589th Alex-x90 🇺🇸 473 200 10ms 20 Apr 2023 589th guilhem-roy 🇫🇷 473 200 10ms 29 Jun 2023 594th CaedenHarper 🇨🇦 472 251 10ms 6 Nov 2025 595th TheZwierzLF 🇵🇱 470 201 10ms 22 May 2025 596th arcage 🇯🇵 470 235 1,258ms 6 May 2021 597th RedzGoose 🇦🇺 469 212 586ms 14 Oct 2024 598th aaronze 🇦🇺 468 177 35ms 17 Sep 2023 599th voytxt 🇨🇿 467 254 12ms 25 Feb 2022 599th alexsave 467 254 9ms 13 Nov 2025 601st KatieLG 🇬🇧 466 369 418ms 13 Oct 2024 602nd dokutan 464 374 1ms 29 Apr 2024 603rd adoxography 463 179 35ms 6 Feb 2019 604th Pyroan 463 204 9ms 3 Aug 2023 605th garrisonhh 463 206 385ms 25 Nov 2020 606th Kusarr 463 428 429ms 17 Dec 2020 607th retrohun 462 383 2ms 7 Mar 2021 608th daedals 461 205 10ms 13 May 2019 608th richard-oelze 🇩🇪 461 205 10ms 14 Feb 2021 608th Mabeloid 🇳🇴 461 205 10ms 20 Oct 2025 611th raphaelimahorn 461 430 355ms 14 days ago 612th denkyuu1 460 180 40ms 42 mins ago 613th galloj 🇨🇿 460 257 171ms 16 Jan 2023 614th BBoehm 🇩🇪 460 258 10ms 15 Feb 2021 614th ArmaanAS 460 258 10ms 29 Mar 2021 616th dokutan 460 580 1,446ms 26 Jan 2026 617th angel-p57 🇯🇵 460 796 3ms 23 Nov 2023 618th yanjs 459 206 10ms 30 Sep 2021 618th feherd 459 206 9ms 14 Aug 2022 618th janbehrens 🇩🇪 459 206 10ms 17 Jun 2023 621st MaxCastella 🇫🇷 457 206 243ms 21 Jan 2025 622nd TheAristos 457 207 10ms 16 Oct 2019 622nd Mathrew2012 457 207 9ms 30 Aug 2024 622nd commandz0 🇺🇸 457 207 11ms 4 May 2025 622nd Lv0Sys 🇵🇱 457 207 10ms 2 Dec 2025 626th dokutan 456 491 120ms 12 Dec 2025 627th asheeri 455 208 9ms 16 Aug 2021 627th Indivicivet 455 208 10ms 26 Oct 2021 629th Shanethegamer 🇺🇸 453 262 9ms 12 May 2023 630th msbranicky 453 321 2ms 26 Sep 2023 631st aspiringLich 453 428 175ms 12 May 2022 631st msbranicky 453 428 180ms 6 Oct 2023 633rd Psirving 452 209 10ms 3 Aug 2020 633rd Andriamanitra 🇫🇮 452 209 10ms 9 Apr 2022 633rd nstearns96 🇬🇧 452 209 9ms 12 Jan 2023 636th Radwatch 452 420 89ms 28 Jun 2022 637th dsx20 451 381 404ms 3 Dec 2022 638th adoxography 450 210 9ms 6 Feb 2019 638th sk- 450 210 10ms 11 Sep 2020 638th argusdusty 🇺🇸 450 210 10ms 11 Jan 2021 First Prev 561–640 of 1,697 Next Last
