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?
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 Awsute 484 317 122ms 12 Apr 2022 562nd Natanaelel 🇸🇪 483 190 3ms 20 May 2022 563rd commandz0 🇺🇸 483 206 572ms 1 Sep 2025 564th emgordon154 483 229 1,292ms 31 Jul 2024 565th TheZwierzLF 🇵🇱 482 172 35ms 18 Dec 2025 566th jascotm 482 196 9ms 21 May 2021 567th dokutan 482 246 10ms 27 Sep 2024 568th ericlangedijk 🇸🇮 482 357 396ms 14 Mar 2022 569th AkashTandon167 482 360 3ms 13 Nov 2019 570th hjo33 481 425 306ms 24 Aug 2022 571st wobblybits 480 197 11ms 14 Aug 2025 571st FortuiteMan 🇫🇷 480 197 10ms 12 Dec 2025 573rd edsrzf 🇳🇿 480 309 7ms 21 Dec 2024 574th philippths 480 413 427ms 5 Apr 2023 575th dokutan 479 397 60ms 29 Apr 2024 576th MeWhenI 🇻🇦 478 220 182ms 3 Aug 2024 577th dokutan 478 402 14ms 20 Apr 2025 578th cypyr 477 198 9ms 8 Aug 2024 579th Laksen 🇩🇰 477 518 27ms 9 Jul 2021 580th aksyristos 476 174 36ms 12 Feb 2023 581st Andrey2001 476 209 577ms 26 Nov 2025 582nd MeWhenI 🇻🇦 476 256 1,021ms 2 Oct 2024 583rd rschwa6308 🇺🇸 475 199 10ms 16 Nov 2019 583rd Troon 475 199 11ms 23 Oct 2022 583rd Lwi-Sandwich 475 199 10ms 22 Apr 2024 583rd andrewjc2000 475 199 10ms 8 Jul 2025 587th edsrzf 🇳🇿 475 308 42ms 11 Feb 2025 588th astdefu 475 400 79ms 8 Dec 2022 589th lucacrose 🇺🇸 474 307 2ms 20 Sep 2023 590th decorator-factory 473 200 10ms 27 May 2019 590th andre-lameirinhas 🇵🇹 473 200 10ms 26 Jul 2022 590th betaveros 473 200 10ms 31 Dec 2022 590th Alex-x90 🇺🇸 473 200 10ms 20 Apr 2023 590th guilhem-roy 🇫🇷 473 200 10ms 29 Jun 2023 595th CaedenHarper 🇨🇦 472 251 10ms 6 Nov 2025 596th denkyuu1 471 176 34ms 19 hours ago 597th arcage 🇯🇵 471 235 1,258ms 6 May 2021 598th TheZwierzLF 🇵🇱 470 201 10ms 22 May 2025 599th RedzGoose 🇦🇺 469 212 586ms 14 Oct 2024 600th aaronze 🇦🇺 468 177 35ms 17 Sep 2023 601st voytxt 🇨🇿 467 254 12ms 25 Feb 2022 601st alexsave 467 254 9ms 13 Nov 2025 603rd KatieLG 🇬🇧 466 369 418ms 13 Oct 2024 604th dokutan 464 374 1ms 29 Apr 2024 605th adoxography 463 179 35ms 6 Feb 2019 606th Pyroan 463 204 9ms 3 Aug 2023 607th garrisonhh 463 206 385ms 25 Nov 2020 608th Kusarr 463 428 429ms 17 Dec 2020 609th retrohun 462 383 2ms 7 Mar 2021 610th daedals 461 205 10ms 13 May 2019 610th richard-oelze 🇩🇪 461 205 10ms 14 Feb 2021 610th Mabeloid 🇳🇴 461 205 10ms 20 Oct 2025 613th raphaelimahorn 461 430 355ms 15 days ago 614th galloj 🇨🇿 460 257 171ms 16 Jan 2023 615th BBoehm 🇩🇪 460 258 10ms 15 Feb 2021 615th ArmaanAS 460 258 10ms 29 Mar 2021 617th dokutan 460 580 1,457ms 26 Jan 2026 618th angel-p57 🇯🇵 460 796 3ms 23 Nov 2023 619th yanjs 459 206 10ms 30 Sep 2021 619th feherd 459 206 9ms 14 Aug 2022 619th janbehrens 🇩🇪 459 206 10ms 17 Jun 2023 622nd MaxCastella 🇫🇷 457 206 243ms 21 Jan 2025 623rd TheAristos 457 207 10ms 16 Oct 2019 623rd Mathrew2012 457 207 9ms 30 Aug 2024 623rd commandz0 🇺🇸 457 207 11ms 4 May 2025 623rd Lv0Sys 🇵🇱 457 207 10ms 2 Dec 2025 627th dokutan 456 491 120ms 12 Dec 2025 628th asheeri 455 208 9ms 16 Aug 2021 628th Indivicivet 455 208 10ms 26 Oct 2021 630th Shanethegamer 🇺🇸 453 262 9ms 12 May 2023 631st msbranicky 453 321 2ms 26 Sep 2023 632nd aspiringLich 453 428 166ms 12 May 2022 632nd msbranicky 453 428 192ms 6 Oct 2023 634th Psirving 452 209 10ms 3 Aug 2020 634th Andriamanitra 🇫🇮 452 209 10ms 9 Apr 2022 634th nstearns96 🇬🇧 452 209 9ms 12 Jan 2023 637th Radwatch 452 420 89ms 28 Jun 2022 638th dsx20 451 381 404ms 3 Dec 2022 639th adoxography 450 210 9ms 6 Feb 2019 639th sk- 450 210 10ms 11 Sep 2020 First Prev 561–640 of 1,698 Next Last
