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?
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 801st madex 🇩🇪 396 209 37ms 29 Jun 2025 802nd timkaiser 396 239 10ms 18 Apr 2019 802nd ridingqwerty 🇺🇸 396 239 10ms 1 Dec 2023 804th Waffle3z 395 210 35ms 17 Jan 2021 804th emgordon154 395 210 36ms 19 Aug 2024 806th shaunjc 395 300 10ms 9 Jun 2021 807th rory660 394 240 10ms 16 Jan 2019 807th Pena86 394 240 10ms 2 Jan 2022 809th mintypython 394 301 10ms 19 Aug 2019 810th Msleizak 🇫🇷 393 240 296ms 27 Jun 2025 811th badboj40 392 241 10ms 18 Jan 2023 812th bac0id 392 506 404ms 26 Sep 2023 813th sapphyrus 391 212 36ms 14 Sep 2019 814th Starwort 🇬🇧 391 242 10ms 30 Mar 2019 814th LeeCamp 391 242 11ms 18 Dec 2021 814th hellwue 391 242 10ms 2 Mar 2023 817th dokutan 391 769 2ms 15 Oct 2024 818th bastienvoirin 🇫🇷 389 243 10ms 6 Apr 2020 818th mizuzimu 389 243 10ms 12 Apr 2020 818th mdnestor 389 243 10ms 4 Jan 2023 821st janbehrens 🇩🇪 388 243 264ms 4 Oct 2021 822nd derekthatcher 388 306 10ms 3 Nov 2023 823rd fourth-bit 387 244 10ms 14 Jul 2023 823rd hiichbindermax 387 244 11ms 11 Sep 2024 823rd croc54 387 244 10ms 30 Dec 2024 826th dokutan 386 453 2ms 21 Jun 2025 827th proton 🇩🇪 385 215 34ms 10 Jun 2020 828th bac0id 385 447 373ms 21 Nov 2021 829th orifu 384 246 10ms 22 Feb 2021 829th VictorStenvers 🇳🇱 384 246 10ms 22 Oct 2024 831st markbyrne 383 247 9ms 23 Oct 2020 832nd dokutan 383 416 74ms 20 Apr 2025 833rd dokutan 382 165 41ms 27 Sep 2024 834th evanrittner 381 248 10ms 17 Feb 2019 834th BrenSchaap 381 248 10ms 21 Oct 2021 834th madex 🇩🇪 381 248 10ms 28 Jun 2025 837th fynnkroeger 380 249 9ms 4 Mar 2021 837th professor-l 380 249 10ms 19 hours ago 839th TLeonardUK 380 500 457ms 2 Jan 2022 840th nikolay 🇺🇸 380 539 279ms 5 Jan 2022 841st omgardner 378 250 10ms 4 Feb 2019 841st ethandhunt 378 250 10ms 20 Jul 2021 843rd n1LS 377 220 35ms 2 Oct 2019 844th mrmena 🇦🇺 377 251 10ms 22 Jun 2021 845th scpchicken 🇵🇼 375 205 262ms 8 Mar 2022 846th geofft 375 252 10ms 10 Dec 2020 846th Mikey-Beep 🇬🇧 375 252 10ms 3 Oct 2022 846th ffelixm 375 252 10ms 21 May 2025 849th hoodadam 374 253 11ms 16 Jul 2019 849th Haksell 🇦🇶 374 253 10ms 1 Dec 2019 851st dokutan 374 661 110ms 3 Jul 2025 852nd yokasuretsu 373 206 132ms 17 Jan 2019 853rd snoozingnewt 🇨🇦 373 318 9ms 5 Oct 2025 854th MadonnaMat 372 223 34ms 21 Jan 2022 855th qwjhvbxi 372 254 10ms 8 Feb 2024 856th DrPiranoid 371 255 10ms 25 Sep 2022 856th UriyaBA 371 255 10ms 21 Dec 2023 858th HumanoidCPU 371 468 3ms 4 Mar 2025 859th Secozzi 369 256 11ms 21 Mar 2021 859th tobyLovick 369 256 11ms 5 Nov 2023 859th WillConker 369 256 10ms 25 Oct 2024 862nd Shanethegamer 🇺🇸 369 301 3ms 20 Jan 2021 863rd acollett89 369 321 13ms 4 Aug 2025 864th Jaykul 368 256 262ms 11 May 2024 865th jacklynnepenick 368 257 11ms 21 Aug 2021 865th brimstonetrader 368 257 10ms 28 Feb 2024 867th shen-hong-xin 365 227 34ms 7 Jul 2021 868th JoeBigToe 365 258 238ms 9 Jun 2020 869th gnlow 🇰🇷 365 325 10ms 3 May 2020 870th SteveL-MSFT 364 259 260ms 6 Jun 2020 871st SniperSmiley 🇺🇸 364 260 10ms 30 May 2021 872nd dokutan 364 562 302ms 12 Dec 2025 873rd dokutan 364 706 1,505ms 9 days ago 874th vroup 🇩🇰 363 327 10ms 20 Sep 2022 875th dokutan 363 548 465ms 27 Dec 2025 876th adamnielson42 🇺🇸 363 555 5ms 2 Oct 2023 877th snltd 362 229 34ms 16 Oct 2019 878th cros107 🇦🇺 362 261 10ms 26 Jun 2023 878th davidtiemstra 362 261 10ms 12 Jul 2023 880th Natanaelel 🇸🇪 361 213 126ms 7 Oct 2021 First Prev 801–880 of 1,700 Next Last
