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?
Intersection 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 241st jiaminglimjm 🇲🇾 572 138 10ms 9 Jan 2021 241st ArmaanAS 572 138 10ms 25 Mar 2021 241st TinyTheBrontosaurus 572 138 11ms 3 Dec 2023 241st markusgraube 572 138 10ms 1 Jul 2024 241st Mathrew2012 572 138 11ms 15 Aug 2024 241st fuzzylojik-golf 🇺🇸 572 138 31ms 14 days ago 247th AforAmpere 568 139 11ms 21 Feb 2021 248th ydevor 🇮🇱 564 140 11ms 20 Nov 2020 248th mathb0y512 564 140 11ms 20 Jan 2023 248th hellwue 564 140 11ms 17 Feb 2023 248th jtaxen 564 140 12ms 28 Apr 2024 248th rustykitty 🇺🇸 564 140 11ms 4 Feb 2026 253rd Waffle3z 560 141 11ms 8 Oct 2020 253rd lemogne 560 141 10ms 9 Aug 2021 253rd HerLovelyTentacles 560 141 10ms 22 Nov 2021 253rd osmith93 560 141 10ms 10 Jul 2022 253rd DavidHospital 560 141 10ms 22 Sep 2023 253rd Peanut-XIV 560 141 10ms 9 Nov 2023 253rd ridingqwerty 🇺🇸 560 141 10ms 1 Feb 2024 253rd inverseLorentz 🇦🇺 560 141 10ms 22 Apr 2024 253rd yokasuretsu 560 141 11ms 10 Jan 2025 253rd khaninm 560 141 11ms 2 Jun 2025 253rd Ignacio6D2 560 141 11ms 26 Feb 2026 264th logvp 556 142 10ms 3 Jan 2024 264th countlpaul-dotcom 556 142 10ms 19 Oct 2025 266th SaswatPadhi 552 143 10ms 5 Sep 2022 267th jgbaldwinbrown 549 144 10ms 29 Jun 2021 267th rollershutter 549 144 10ms 8 Oct 2025 267th Aphadion 549 144 11ms 19 Feb 2026 270th maggym00 545 145 10ms 27 Apr 2021 270th AkashTandon167 545 145 11ms 25 May 2021 270th LeeCamp 545 145 10ms 9 Dec 2021 270th eshilo-draper 545 145 17ms 15 Jun 2023 270th Ythaenagor 545 145 17ms 5 Aug 2024 275th MisterrLuck 541 146 10ms 3 Sep 2023 275th Command-Master 541 146 11ms 24 Sep 2023 275th solisolu 541 146 10ms 7 Nov 2025 275th error256 541 146 15ms 16 Feb 2026 279th mossprescott 534 148 10ms 17 Jan 2023 279th aksyristos 534 148 10ms 28 Feb 2023 281st NicoAdams 527 150 10ms 21 Nov 2021 281st fgrosshans 🇫🇷 527 150 10ms 12 Jan 2022 281st MaxElf999 527 150 10ms 27 Sep 2022 281st egasyelir 527 150 10ms 13 Jul 2024 281st voytxt 🇨🇿 527 150 11ms 19 Feb 2026 286th cpeck-rmvd 523 151 11ms 18 Jan 2023 287th Pena86 520 152 16ms 14 Mar 2021 287th JakeDaCake36 520 152 3,859ms 24 Feb 2024 287th BREMAUCY 🇫🇷 520 152 10ms 22 Sep 2025 290th vishwathg 516 153 24ms 27 Sep 2022 290th mbittner20 516 153 10ms 27 May 2023 292nd Starwort 🇬🇧 513 154 11ms 5 Mar 2021 292nd nstearns96 🇬🇧 513 154 10ms 15 Dec 2022 294th sciencejiho 510 155 10ms 26 Sep 2024 295th Anonymousellama21 506 156 10ms 8 Dec 2021 295th Bananapants22 506 156 10ms 30 Aug 2022 295th NickTheEASDude 🇺🇸 506 156 11ms 6 May 2024 298th Andre3582 503 157 12ms 6 Nov 2020 298th DrPiranoid 503 157 10ms 24 Sep 2022 298th Bodo171 503 157 17ms 27 Nov 2022 298th gthayden23 503 157 30ms 29 Oct 2023 298th retrohun 503 157 19ms 22 Feb 2026 303rd Omega65536 🇩🇪 500 158 10ms 7 Jan 2021 303rd Bonjour27891 🇻🇳 500 158 11ms 13 Mar 2022 303rd Tess2662 500 158 15ms 4 Mar 2023 303rd epic-programmer-guy 500 158 10ms 31 Dec 2023 307th glesnick 497 159 10ms 15 Jul 2022 308th vezzick 494 160 10ms 5 Mar 2021 308th roguh 🇬🇹 494 160 10ms 23 Jan 2024 310th ehulinsky 🇺🇸 491 161 28ms 15 Sep 2021 310th WillowWispy 491 161 11ms 14 Mar 2025 312th Marthe-CC 488 162 10ms 16 Oct 2022 312th Cynopolis 488 162 10ms 17 Oct 2023 314th Wildst 482 164 11ms 7 Jul 2023 314th jameswmccarty 482 164 12ms 28 Mar 2025 316th za3k 479 165 10ms 9 Oct 2022 317th SniperSmiley 🇺🇸 476 166 10ms 15 Jun 2022 317th DrPrettyman 476 166 10ms 11 Jul 2023 317th askipio 476 166 11ms 22 Nov 2023 317th qwjhvbxi 476 166 10ms 10 Feb 2024 First Prev 241–320 of 399 Next Last