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 bytes. 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 Bytes Time Submitted 239th tobyLovick 530 264 11ms 5 Nov 2023 239th WillConker 530 264 10ms 25 Oct 2024 239th madex 🇩🇪 530 264 10ms 28 Jun 2025 244th brimstonetrader 528 265 10ms 28 Feb 2024 245th SniperSmiley 🇺🇸 522 268 10ms 30 May 2021 246th fynnkroeger 520 269 9ms 4 Mar 2021 246th cros107 🇦🇺 520 269 10ms 26 Jun 2023 246th davidtiemstra 520 269 10ms 12 Jul 2023 249th StardustGogeta 517 271 10ms 17 Nov 2019 249th ValdeQwerty 517 271 12ms 10 Sep 2020 249th jacklynnepenick 517 271 11ms 21 Aug 2021 252nd twocatsinatrenchcoat 511 274 10ms 24 Nov 2022 252nd l-donovan 511 274 10ms 2 Feb 2024 252nd qwjhvbxi 511 274 10ms 8 Feb 2024 252nd dirckvdende 511 274 10ms 6 Jul 2025 256th mrmena 🇦🇺 509 275 10ms 22 Jun 2021 256th sleepyStick 509 275 10ms 11 Mar 2022 258th Dazza314 🇬🇧 507 276 11ms 27 Oct 2020 259th hoodadam 505 277 11ms 16 Jul 2019 259th n0es 505 277 10ms 7 Oct 2022 261st zuparnowa 504 278 11ms 11 Feb 2019 261st henrytranter 504 278 10ms 20 Sep 2019 261st UniBlueFerox 504 278 9ms 21 Oct 2020 261st robertovers 504 278 12ms 1 Oct 2023 265th dillon-duncando 500 280 9ms 4 Oct 2022 265th DrPrettyman 500 280 9ms 25 Jul 2023 265th strogor 500 280 11ms 9 Jun 2025 268th cingulataluke 493 284 10ms 26 Aug 2023 269th f-tucker 486 288 9ms 30 May 2024 270th alangodfrey 484 289 10ms 30 Jan 2019 271st ztuned 483 290 11ms 26 Jul 2023 272nd eiburns 479 292 10ms 26 Jan 2023 272nd Vaekor 479 292 11ms 3 Aug 2023 272nd azka1368 479 292 10ms 24 Nov 2023 275th SirFireball3521 478 293 10ms 25 Jan 2023 276th hyvyys 476 294 10ms 11 Sep 2020 277th DrPiranoid 475 295 10ms 25 Sep 2022 278th eddvrs 473 296 11ms 22 Dec 2023 279th Haksell 🇦🇶 471 297 10ms 1 Dec 2019 279th Kasci 471 297 22ms 30 Dec 2021 279th amollberg 🇸🇪 471 297 22ms 29 Jan 2022 279th OppositeShark 471 297 10ms 19 Jul 2022 279th ellis-rix 471 297 10ms 23 May 2023 284th omri2001 470 298 10ms 22 Oct 2022 285th Trunksistor 🇫🇷 467 300 10ms 11 Apr 2022 285th Emutis 🇱🇹 467 300 11ms 26 Aug 2025 287th EyalLitvin 464 302 10ms 25 Nov 2022 288th dev-kas 458 306 10ms 24 Aug 2025 289th Rubiksmath 456 307 9ms 29 Sep 2024 290th zwxzwxzwx21 453 309 11ms 30 Jan 2024 291st rak1507 🇬🇧 450 311 10ms 26 Nov 2021 292nd dcure73 449 312 9ms 7 Jun 2019 293rd abcdhhhh 440 318 10ms 26 Aug 2024 294th wenbang24 435 322 12ms 29 Mar 2024 295th atazzam 🇺🇸 433 323 10ms 5 Mar 2022 296th stordev 429 326 10ms 26 Feb 2021 297th vuxlee584 🇻🇳 428 327 11ms 15 Aug 2022 297th epic-programmer-guy 428 327 10ms 20 Dec 2025 299th LukasFolwarczny 🇨🇿 426 329 10ms 16 Sep 2022 300th hotmanga 420 333 10ms 23 Oct 2023 300th xbxbxb007 420 333 10ms 10 Jan 2024 302nd FlorianCassayre 🇫🇷 417 336 20ms 29 Sep 2023 303rd mishak-sys 412 340 10ms 28 Mar 2025 304th martinnorling 🇸🇪 411 341 10ms 8 Mar 2022 304th CoolBvll 411 341 10ms 12 Jun 2025 306th Fracture17 408 343 10ms 2 Apr 2023 306th NoneTheFewer 408 343 10ms 5 Jan 2026 308th chbea1 407 344 11ms 20 Apr 2021 308th YAJUE114514 407 344 11ms 12 Dec 2025 310th DarkTemplar5 405 346 9ms 10 Oct 2020 310th Bananapants22 405 346 9ms 19 Aug 2022 312th simplylu 403 347 10ms 2 Mar 2021 312th pquline 403 347 10ms 6 Apr 2025 314th skps2010 400 350 10ms 28 Jan 2019 315th zax2002 399 351 11ms 7 Sep 2020 316th DGipe 391 358 11ms 1 Dec 2022 317th yuchuehw 390 359 11ms 11 Jan 2024 318th pafcom 389 360 11ms 4 Oct 2021 319th newc0m 383 366 10ms 8 Apr 2019 320th VictorFordham 381 367 11ms 12 Aug 2020 First Prev 241–320 of 387 Next Last
