The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
ASCII Table 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 159th yzhs 🇩🇪 702 124 10ms 23 Jun 2023 159th tayacrystals 702 124 10ms 18 Nov 2023 159th nstearns96 🇬🇧 702 124 10ms 28 Jun 2024 164th jiaminglimjm 🇲🇾 696 125 9ms 30 Sep 2022 164th Starwort 🇬🇧 696 125 9ms 9 Nov 2022 164th juan-cazalvilla 696 125 10ms 14 Feb 2023 164th Fracture17 696 125 10ms 8 Apr 2023 164th FranklinJiaChen 696 125 9ms 13 Jun 2024 164th EnTerr 696 125 10ms 15 Sep 2024 164th jipsong 🇩🇪 696 125 9ms 1 May 2025 164th ninjaprawn 696 125 10ms 20 days ago 172nd cubed-guy 690 126 17ms 3 Apr 2022 172nd celiendonze 🇨🇭 690 126 10ms 30 Mar 2023 172nd jbjd 690 126 9ms 19 Feb 2024 175th rifatx 685 127 10ms 16 Mar 2023 175th amadeusdotpng 685 127 11ms 22 Apr 2023 175th khavik 685 127 17ms 18 May 2024 175th Europe2048 685 127 9ms 13 days ago 179th andersk 🇺🇸 680 128 10ms 25 Oct 2022 179th QuincyNash 🇺🇸 680 128 11ms 7 Dec 2022 179th stertooy 🇧🇪 680 128 9ms 14 Jun 2024 179th arjunarya1 680 128 9ms 28 Aug 2025 179th M4rc0g1 680 128 10ms 19 Nov 2025 184th fgrosshans 🇫🇷 674 129 10ms 12 Jul 2022 184th myleopard 674 129 10ms 20 Jul 2022 184th ceeb9 674 129 10ms 11 May 2023 184th carotinoid 🇰🇷 674 129 10ms 6 days ago 188th AbelPelser 669 130 11ms 2 Jul 2022 188th mosho-p 669 130 10ms 13 Oct 2022 188th Eilonlif 🇮🇱 669 130 10ms 2 Nov 2022 188th yishayv 669 130 16ms 22 Jan 2023 188th SB-945 669 130 10ms 17 Apr 2024 188th jfallon1997 669 130 10ms 29 Apr 2024 188th 42triangles 669 130 11ms 13 May 2024 188th lelbal 669 130 13ms 27 Aug 2025 188th Code-Coder-coder 669 130 10ms 13 Oct 2025 197th DrPiranoid 664 131 10ms 23 Sep 2022 197th chartung17 664 131 10ms 10 Dec 2023 197th tnecio 664 131 10ms 21 Jun 2024 197th sjrct 664 131 16ms 4 Aug 2024 197th rschwa6308 🇺🇸 664 131 9ms 22 Jan 2025 197th PyryL 🇫🇮 664 131 10ms 1 Mar 2025 203rd RYNO8 659 132 11ms 16 Aug 2022 203rd kyleclaassen 659 132 9ms 28 May 2023 203rd Googolplexo 🇷🇺 659 132 10ms 7 hours ago 206th guilhem-roy 🇫🇷 654 133 18ms 27 Apr 2022 206th quarl 654 133 9ms 13 Nov 2024 206th mothcolada 🇺🇸 654 133 10ms 5 Jul 2025 206th SectorCorruptor 654 133 10ms 27 Sep 2025 206th Babafaba 654 133 10ms 30 Oct 2025 211th nayakrujul 649 134 10ms 24 Dec 2022 211th sandorstormen 649 134 10ms 11 Mar 2023 211th bbnumber2 649 134 16ms 29 Oct 2023 211th HumanoidCPU 649 134 10ms 25 Dec 2025 215th Irratix 🇳🇱 644 135 11ms 28 Apr 2022 215th Ripick 644 135 10ms 4 Feb 2023 215th AbhilashaTandon 644 135 10ms 21 Sep 2023 215th hiichbindermax 644 135 15ms 11 Sep 2024 219th nmougino 🇫🇷 640 136 17ms 26 May 2022 219th adamnielson42 🇺🇸 640 136 10ms 26 Jan 2025 219th itljan30 640 136 10ms 26 Jan 2025 222nd petroselo 635 137 10ms 10 Apr 2022 222nd dkdna 635 137 11ms 8 Mar 2023 222nd ridingqwerty 🇺🇸 635 137 10ms 31 Jan 2024 222nd hellwue 635 137 10ms 2 Sep 2024 222nd sciencedjinn 635 137 10ms 8 Nov 2024 222nd Mathrew2012 635 137 9ms 9 Nov 2024 228th Bonjour27891 🇻🇳 630 138 10ms 30 Mar 2022 228th twocatsinatrenchcoat 630 138 10ms 4 May 2022 228th za3k 630 138 10ms 12 Oct 2022 228th 6lr61 630 138 18ms 25 Dec 2022 228th mrmena 🇦🇺 630 138 17ms 4 Feb 2024 228th JunkIce 630 138 9ms 3 Dec 2024 228th wobblybits 630 138 10ms 2 Sep 2025 235th MichalMarsalek 🇨🇿 626 139 10ms 26 Mar 2022 235th midnattssol 🇸🇪 626 139 10ms 27 Jul 2023 235th Fanrco 626 139 10ms 4 Sep 2023 235th RZ781 626 139 19ms 19 Nov 2023 239th inverseLorentz 🇦🇺 621 140 10ms 22 Jun 2022 239th RobertHoeh 621 140 10ms 30 Nov 2024 First Prev 161–240 of 473 Next Last