The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Zeckendorf Representation 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 79th retrohun 818 137 11ms 23 Oct 2025 79th kitotch 818 137 11ms 6 days ago 83rd ZakkkkAttackkkk 🇵🇭 812 138 12ms 2 Jul 2024 83rd dirckvdende 812 138 11ms 2 Aug 2025 85th elgan65536 🇺🇸 806 139 10ms 5 Jul 2024 85th cykim8811 806 139 10ms 10 Jul 2024 85th Alex-x90 🇺🇸 806 139 10ms 14 Jul 2024 85th vhoulbreque 🇫🇷 806 139 38ms 9 Feb 2025 85th qpwoeirut 806 139 12ms 25 Sep 2025 90th Natanaelel 🇸🇪 800 140 11ms 2 Jul 2024 91st jmerle 🇳🇱 794 141 12ms 4 Jul 2024 92nd neihousaigaai 789 142 11ms 29 Sep 2024 93rd Stockoh 🇫🇷 783 143 11ms 29 Sep 2024 93rd snydej 783 143 31ms 21 Nov 2024 95th scpchicken 🇵🇼 778 144 30ms 13 Jul 2024 96th commandz0 🇺🇸 772 145 11ms 1 Jul 2024 96th jared-hughes 772 145 9ms 3 Jul 2024 96th wh3n3v3r 🇨🇿 772 145 11ms 18 Nov 2024 96th Babafaba 772 145 69ms 2 Nov 2025 100th KrausRaus 🇺🇸 767 146 12ms 4 Jul 2024 100th ComputerKWasTaken 🇺🇸 767 146 12ms 4 Jul 2024 100th hellwue 767 146 30ms 18 Jul 2024 100th btjones0 767 146 9ms 7 Feb 2025 104th fgrosshans 🇫🇷 757 148 9ms 9 Jul 2024 105th StefanHabel 🇨🇦 752 149 11ms 22 Mar 2025 105th luuumine 🇫🇷 752 149 10ms 1 Dec 2025 107th BREMAUCY 🇫🇷 747 150 10ms 3 Jul 2024 108th roguh 🇬🇹 742 151 10ms 30 Jul 2024 108th 051 🇸🇬 742 151 15ms 5 Feb 2026 110th hiichbindermax 737 152 10ms 15 Jul 2024 110th RaBa21 🇭🇺 737 152 10ms 12 Jul 2025 110th InigoK 🇺🇸 737 152 214ms 4 Sep 2025 110th Andrey2001 737 152 11ms 17 Dec 2025 114th leon-w 732 153 11ms 24 Jul 2024 115th HumanoidCPU 718 156 10ms 1 Jul 2024 115th CutSandstone 718 156 10ms 2 Jul 2024 117th mbittner20 713 157 10ms 11 Jul 2024 117th Vaekor 713 157 10ms 23 Jul 2024 117th theadamabrams 713 157 11ms 26 Dec 2024 120th jacekwladzinski 704 159 10ms 7 Oct 2025 121st vgamula 🇺🇦 700 160 31ms 3 Jul 2024 122nd JOrE20 696 161 10ms 5 Feb 2026 123rd jtaxen 691 162 12ms 2 Jul 2024 123rd nstearns96 🇬🇧 691 162 11ms 9 Jul 2024 123rd wuzekai518 691 162 12ms 23 Jul 2024 126th Pyroan 687 163 10ms 14 May 2025 127th OCNeve 683 164 10ms 3 Jul 2024 127th muser-logiccpu 🇺🇦 683 164 10ms 9 Aug 2025 129th AtengChen 679 165 11ms 14 Aug 2024 130th jatloe 667 168 11ms 24 Aug 2024 130th SB-945 667 168 11ms 10 Jan 2025 132nd marcin7Cd 659 170 9ms 11 Jul 2024 132nd YAJUE114514 659 170 11ms 31 Jul 2025 134th sheen4n 655 171 11ms 21 Jul 2024 134th dokutan 655 171 10ms 11 Jan 2026 136th klixel 🇨🇦 647 173 13ms 20 Jan 2025 137th croc54 644 174 9ms 17 Jan 2025 138th coldham10 629 178 11ms 13 Jan 2026 139th madex 🇩🇪 622 180 10ms 1 Jul 2024 140th robin-scragg 605 185 11ms 5 Jul 2025 141st ginop 602 186 9ms 2 Jul 2024 141st inverseLorentz 🇦🇺 602 186 11ms 8 Jul 2024 143rd OllieBoyne 🇬🇧 593 189 11ms 12 Jul 2024 144th tomh1012 586 191 10ms 21 Jan 2026 145th Mabeloid 🇳🇴 580 193 11ms 11 Sep 2024 146th zt14427 552 203 9ms 1 Jul 2024 147th jameswmccarty 507 221 10ms 10 Jul 2024 148th azure-blondon 491 228 10ms 7 Jul 2024 149th yuchuehw 489 229 11ms 5 Jul 2024 150th TheZwierzLF 🇵🇱 463 242 13ms 25 Nov 2025 151st galloj 🇨🇿 461 243 15ms 26 Aug 2024 152nd Zhenyu-Bo 406 276 10ms 1 Aug 2025 153rd AidanWalter 156 716 11ms 3 Jan 2025 First Prev 81–153 of 153
