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 Python 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 ethandhunt 384 250 10ms 20 Jul 2021 242nd mrmena 🇦🇺 382 251 10ms 22 Jun 2021 243rd geofft 381 252 10ms 10 Dec 2020 243rd Mikey-Beep 🇬🇧 381 252 10ms 3 Oct 2022 243rd ffelixm 381 252 10ms 21 May 2025 246th hoodadam 379 253 11ms 16 Jul 2019 246th Haksell 🇦🇶 379 253 10ms 1 Dec 2019 248th qwjhvbxi 378 254 10ms 8 Feb 2024 249th DrPiranoid 376 255 10ms 25 Sep 2022 249th UriyaBA 376 255 10ms 21 Dec 2023 251st Secozzi 375 256 11ms 21 Mar 2021 251st tobyLovick 375 256 11ms 5 Nov 2023 251st WillConker 375 256 10ms 25 Oct 2024 254th jacklynnepenick 374 257 11ms 21 Aug 2021 254th brimstonetrader 374 257 10ms 28 Feb 2024 256th SniperSmiley 🇺🇸 369 260 10ms 30 May 2021 257th cros107 🇦🇺 368 261 10ms 26 Jun 2023 257th davidtiemstra 368 261 10ms 12 Jul 2023 259th StardustGogeta 365 263 10ms 17 Nov 2019 259th ValdeQwerty 365 263 12ms 10 Sep 2020 261st eddvrs 364 264 11ms 22 Dec 2023 262nd alangodfrey 362 265 10ms 30 Jan 2019 262nd ellis-rix 362 265 10ms 23 May 2023 264th twocatsinatrenchcoat 361 266 10ms 24 Nov 2022 264th l-donovan 361 266 10ms 2 Feb 2024 264th dirckvdende 361 266 10ms 6 Jul 2025 267th sleepyStick 360 267 10ms 11 Mar 2022 267th Rubiksmath 360 267 9ms 29 Sep 2024 269th zuparnowa 358 268 11ms 11 Feb 2019 269th henrytranter 358 268 10ms 20 Sep 2019 269th Dazza314 🇬🇧 358 268 11ms 27 Oct 2020 272nd n0es 357 269 10ms 7 Oct 2022 273rd UniBlueFerox 356 270 9ms 21 Oct 2020 274th rak1507 🇬🇧 354 271 10ms 26 Nov 2021 275th dillon-duncando 353 272 9ms 4 Oct 2022 275th DrPrettyman 353 272 9ms 25 Jul 2023 275th strogor 353 272 11ms 9 Jun 2025 278th omri2001 350 274 10ms 22 Oct 2022 278th cingulataluke 350 274 10ms 26 Aug 2023 280th OppositeShark 347 277 10ms 19 Jul 2022 281st robertovers 345 278 12ms 1 Oct 2023 282nd hyvyys 343 280 10ms 11 Sep 2020 282nd EyalLitvin 343 280 10ms 25 Nov 2022 282nd ztuned 343 280 11ms 26 Jul 2023 282nd f-tucker 343 280 9ms 30 May 2024 286th eiburns 338 284 10ms 26 Jan 2023 286th Vaekor 338 284 11ms 3 Aug 2023 286th azka1368 338 284 10ms 24 Nov 2023 289th amollberg 🇸🇪 334 287 22ms 29 Jan 2022 290th stordev 333 288 10ms 26 Feb 2021 291st Kasci 332 289 22ms 30 Dec 2021 291st hotmanga 332 289 10ms 23 Oct 2023 291st xbxbxb007 332 289 10ms 10 Jan 2024 294th mishak-sys 331 290 10ms 28 Mar 2025 294th Emutis 🇱🇹 331 290 11ms 26 Aug 2025 296th Trunksistor 🇫🇷 329 292 10ms 11 Apr 2022 297th dcure73 327 294 9ms 7 Jun 2019 297th abcdhhhh 327 294 10ms 26 Aug 2024 299th CoolBvll 323 297 10ms 12 Jun 2025 300th dev-kas 322 298 10ms 24 Aug 2025 301st Fracture17 321 299 10ms 2 Apr 2023 301st zwxzwxzwx21 321 299 11ms 30 Jan 2024 303rd Bananapants22 318 302 9ms 19 Aug 2022 304th skps2010 316 304 10ms 28 Jan 2019 305th DarkTemplar5 314 306 9ms 10 Oct 2020 306th zax2002 313 307 11ms 7 Sep 2020 306th LukasFolwarczny 🇨🇿 313 307 10ms 16 Sep 2022 306th pquline 313 307 10ms 6 Apr 2025 309th wenbang24 310 310 12ms 29 Mar 2024 310th simplylu 307 313 10ms 2 Mar 2021 311th atazzam 🇺🇸 305 315 10ms 5 Mar 2022 312th vuxlee584 🇻🇳 301 319 11ms 15 Aug 2022 312th epic-programmer-guy 301 319 10ms 20 Dec 2025 314th yuchuehw 297 323 11ms 11 Jan 2024 315th martinnorling 🇸🇪 294 327 10ms 8 Mar 2022 316th valgardg 🇮🇸 292 329 10ms 19 Aug 2021 316th NoneTheFewer 292 329 10ms 5 Jan 2026 318th vonKrafft 290 331 11ms 25 Mar 2020 319th xkacer 🇨🇿 289 332 10ms 25 Jan 2021 319th chbea1 289 332 11ms 20 Apr 2021 First Prev 241–320 of 387 Next Last
