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 881st SirFireball3521 359 214 161ms 8 Mar 2023 882nd StardustGogeta 359 263 10ms 17 Nov 2019 882nd ValdeQwerty 359 263 12ms 10 Sep 2020 884th unfinishedprogram 359 330 10ms 12 Jul 2024 885th jgbaldwinbrown 359 483 3ms 21 Sep 2021 886th m-tkach 🇺🇦 359 837 2ms 18 May 2022 887th eddvrs 358 264 11ms 22 Dec 2023 888th neel11235813 358 331 11ms 1 Feb 2024 889th Maximizer02 358 414 8ms 30 Jul 2024 890th alangodfrey 357 265 10ms 30 Jan 2019 890th ellis-rix 357 265 10ms 23 May 2023 892nd Shanethegamer 🇺🇸 357 473 4ms 2 Jul 2023 893rd gjh71 🇳🇱 356 265 256ms 27 Dec 2020 894th bbakersmith 356 343 15ms 30 Jul 2021 895th Natanaelel 🇸🇪 355 230 32ms 1 Mar 2025 896th twocatsinatrenchcoat 355 266 10ms 24 Nov 2022 896th l-donovan 355 266 10ms 2 Feb 2024 896th dirckvdende 355 266 10ms 6 Jul 2025 899th sleepyStick 354 267 10ms 11 Mar 2022 899th Rubiksmath 354 267 9ms 29 Sep 2024 901st NameRandomString 354 500 16ms a min ago 902nd zuparnowa 353 268 11ms 11 Feb 2019 902nd henrytranter 353 268 10ms 20 Sep 2019 902nd Dazza314 🇬🇧 353 268 11ms 27 Oct 2020 905th n0es 351 269 10ms 7 Oct 2022 906th UniBlueFerox 350 270 9ms 21 Oct 2020 907th Shanethegamer 🇺🇸 350 348 1,022ms 8 Sep 2021 908th rak1507 🇬🇧 349 271 10ms 26 Nov 2021 909th dillon-duncando 348 272 9ms 4 Oct 2022 909th DrPrettyman 348 272 9ms 25 Jul 2023 909th strogor 348 272 11ms 9 Jun 2025 912th JOrE20 348 862 2ms 4 Dec 2025 913th msbranicky 347 275 406ms 15 Jan 2024 914th dsntzn 🇸🇰 347 342 10ms 10 Aug 2020 915th iznax 347 495 364ms 21 Nov 2021 916th omri2001 345 274 10ms 22 Oct 2022 916th cingulataluke 345 274 10ms 26 Aug 2023 918th KatieLG 🇬🇧 345 773 1,399ms 7 Jul 2025 919th csharpython 344 241 35ms 14 Sep 2025 920th cjdyer 343 554 3,131ms 18 days ago 921st OppositeShark 341 277 10ms 19 Jul 2022 922nd robertovers 340 278 12ms 1 Oct 2023 923rd GeorgeStechman 🇬🇧 340 349 11ms 23 Jun 2022 924th hyvyys 338 280 10ms 11 Sep 2020 924th EyalLitvin 338 280 10ms 25 Nov 2022 924th ztuned 338 280 11ms 26 Jul 2023 924th f-tucker 338 280 9ms 30 May 2024 928th rbertram90 🇬🇧 338 499 4ms 18 Nov 2024 929th matejmatik123 🇸🇰 338 562 1,464ms 12 Jul 2025 930th mukulkesh 335 354 12ms 23 Mar 2023 931st eiburns 333 284 10ms 26 Jan 2023 931st Vaekor 333 284 11ms 3 Aug 2023 931st azka1368 333 284 10ms 24 Nov 2023 934th liviucerchez 333 507 5ms 21 Oct 2023 935th Shanethegamer 🇺🇸 329 286 259ms 14 Sep 2021 936th amollberg 🇸🇪 329 287 22ms 29 Jan 2022 937th stordev 328 288 10ms 26 Feb 2021 938th lewdev 🇺🇸 328 362 10ms 25 Jul 2021 939th MeWhenI 🇻🇦 328 915 2ms 2 Nov 2021 940th Kasci 327 289 22ms 30 Dec 2021 940th hotmanga 327 289 10ms 23 Oct 2023 940th xbxbxb007 327 289 10ms 10 Jan 2024 943rd ptforness 327 363 9ms 30 Dec 2022 944th dokutan 327 516 4ms 20 Apr 2025 945th mishak-sys 326 290 10ms 28 Mar 2025 945th Emutis 🇱🇹 326 290 11ms 26 Aug 2025 947th varhammer 326 491 14ms 13 Dec 2023 948th BREMAUCY 🇫🇷 326 527 361ms 30 Jun 2023 949th Trunksistor 🇫🇷 324 292 10ms 11 Apr 2022 950th crizin 🇰🇷 323 614 410ms 9 Sep 2023 951st dcure73 322 294 9ms 7 Jun 2019 951st abcdhhhh 322 294 10ms 26 Aug 2024 953rd bakkeby 321 536 3ms 29 Sep 2022 954th CarraUjilen 320 294 259ms 26 Jul 2022 954th JPRuskin 🇬🇧 320 294 241ms 11 May 2024 956th Shanethegamer 🇺🇸 320 537 412ms 22 Apr 2022 957th CoolBvll 318 297 10ms 12 Jun 2025 958th dev-kas 317 298 10ms 24 Aug 2025 959th Bishwajit2u 317 374 11ms 17 Sep 2021 960th Fracture17 316 299 10ms 2 Apr 2023 First Prev 881–960 of 1,700 Next Last
