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?
Foo Fizz Buzz Bar 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 241st AshGriffiths 976 85 37ms 7 Aug 2022 241st fredrik-bakke 🇳🇴 976 85 41ms 3 Nov 2022 241st aeonsablaze 976 85 11ms 22 Nov 2022 241st oceko 976 85 36ms 24 Mar 2023 241st Griff95 976 85 38ms 19 Sep 2023 241st anarconic 976 85 36ms 6 Dec 2023 241st christensendaniel 976 85 39ms 15 May 2024 248th tr0mb0n3man 965 86 11ms 6 Dec 2021 248th Trunksistor 🇫🇷 965 86 11ms 21 Apr 2022 248th Mikey-Beep 🇬🇧 965 86 12ms 30 Jun 2022 248th bwenstar 965 86 12ms 11 Aug 2022 248th nstearns96 🇬🇧 965 86 11ms 27 Oct 2022 248th jakobkordez 🇸🇮 965 86 11ms 29 Nov 2022 248th CodeAltF4 965 86 11ms 14 Mar 2023 248th musicallyanna 965 86 11ms 3 Apr 2023 248th jhu04 965 86 11ms 26 Apr 2023 248th ritwinnarra 965 86 11ms 11 Jun 2023 248th rollershutter 965 86 10ms 1 Jul 2023 248th saladleaf 965 86 11ms 24 Jul 2023 248th tobeannouncd 965 86 39ms 19 Sep 2023 248th wen1now 965 86 12ms 6 Nov 2023 248th janeclange 965 86 11ms 13 Nov 2023 248th MrAleborg 965 86 11ms 19 Nov 2023 248th mar-moraes 965 86 39ms 13 Feb 2024 248th BoBz200 965 86 11ms 30 Sep 2024 248th nemulilonala 965 86 11ms 22 Nov 2024 248th KingReeve 965 86 12ms 25 Nov 2024 248th JOrE-Softwares 965 86 11ms 1 Jun 2025 248th EthanJantz 965 86 12ms 15 Aug 2025 248th NicoPlayZ9002-YT 965 86 12ms 6 Jan 2026 271st IoLimmer 954 87 11ms 16 Jul 2024 271st imelxr 🇮🇱 954 87 11ms 14 Aug 2024 273rd chayleaf 943 88 42ms 7 Jan 2022 273rd mhenion8293 🇺🇸 943 88 11ms 23 Jan 2022 273rd henrytranter 943 88 41ms 25 Jan 2022 273rd Andriamanitra 🇫🇮 943 88 12ms 14 Jul 2022 273rd Kacarott 🇦🇺 943 88 12ms 20 Sep 2023 273rd keelimeguy 🇺🇸 943 88 43ms 14 Oct 2023 273rd bzijlema 🇳🇱 943 88 11ms 2 Nov 2023 273rd fbe 943 88 37ms 14 Dec 2024 273rd albanian-laundromat 943 88 10ms 1 Sep 2025 273rd TheSecondComing123 943 88 11ms 5 Feb 2026 283rd PhysicDev 🇫🇷 933 89 11ms 15 Mar 2022 283rd martinnorling 🇸🇪 933 89 43ms 20 Jun 2022 283rd OllieBoyne 🇬🇧 933 89 11ms 11 Sep 2022 283rd randolchance 933 89 11ms 20 Jan 2023 283rd jeff-at-tamer-dot-codes 🇺🇸 933 89 10ms 18 May 2023 283rd Skwerl23 933 89 11ms 19 May 2023 283rd tnecio 933 89 11ms 18 Jun 2024 283rd Mabeloid 🇳🇴 933 89 11ms 18 Sep 2024 283rd jamiloBBKing 933 89 12ms 27 Jan 2025 283rd Pyroan 933 89 12ms 12 Mar 2025 283rd davidludwik2370 933 89 12ms 24 Jul 2025 283rd cros107 🇦🇺 933 89 11ms 1 Nov 2025 283rd kitotch 933 89 11ms 12 days ago 296th peterprescott 922 90 12ms 22 Nov 2021 296th Fishron 922 90 11ms 24 Nov 2021 296th knutae 🇳🇴 922 90 12ms 25 Nov 2021 296th RDShah 922 90 11ms 25 Nov 2021 296th sbr075 922 90 13ms 7 Dec 2021 296th CedricGebistorf 922 90 12ms 24 Feb 2022 296th hiichbindermax 922 90 11ms 26 Feb 2022 296th LHuitre 922 90 11ms 15 Apr 2022 296th alex-costea 922 90 11ms 15 Apr 2022 296th Indivicivet 922 90 11ms 9 May 2022 296th AGoyet 922 90 11ms 11 Jul 2022 296th galloj 🇨🇿 922 90 11ms 16 Aug 2022 296th Yareeeema 922 90 11ms 18 Aug 2022 296th jfallon1997 922 90 11ms 6 Sep 2022 296th MaxElf999 922 90 11ms 3 Oct 2022 296th TheBlupper 922 90 11ms 3 Oct 2022 296th ValentinCassayre 922 90 11ms 9 Oct 2022 296th Omega65536 🇩🇪 922 90 12ms 22 Nov 2022 296th jacksonhenry3 922 90 11ms 2 Dec 2022 296th Techdude01 922 90 11ms 17 Dec 2022 296th M0PKOBKA 922 90 11ms 26 Dec 2022 296th NOS4A5I 922 90 12ms 30 Dec 2022 296th TheGlitcher1705 922 90 39ms 16 Mar 2023 296th SB-945 922 90 12ms 10 Jul 2023 296th cingulataluke 922 90 11ms 26 Aug 2023 First Prev 241–320 of 880 Next Last