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?
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 80th shelerr 818 137 10ms 22 Aug 2025 80th retrohun 818 137 11ms 23 Oct 2025 80th kitotch 818 137 11ms 8 days ago 84th ZakkkkAttackkkk 🇵🇭 812 138 12ms 2 Jul 2024 84th dirckvdende 812 138 11ms 2 Aug 2025 86th elgan65536 🇺🇸 806 139 10ms 5 Jul 2024 86th cykim8811 806 139 10ms 10 Jul 2024 86th Alex-x90 🇺🇸 806 139 10ms 14 Jul 2024 86th vhoulbreque 🇫🇷 806 139 38ms 9 Feb 2025 86th qpwoeirut 806 139 12ms 25 Sep 2025 91st Natanaelel 🇸🇪 800 140 11ms 2 Jul 2024 92nd jmerle 🇳🇱 794 141 12ms 4 Jul 2024 93rd neihousaigaai 789 142 11ms 29 Sep 2024 94th Stockoh 🇫🇷 783 143 11ms 29 Sep 2024 94th snydej 783 143 31ms 21 Nov 2024 96th scpchicken 🇵🇼 778 144 30ms 13 Jul 2024 97th commandz0 🇺🇸 772 145 11ms 1 Jul 2024 97th jared-hughes 772 145 9ms 3 Jul 2024 97th wh3n3v3r 🇨🇿 772 145 11ms 18 Nov 2024 97th Babafaba 772 145 69ms 2 Nov 2025 101st KrausRaus 🇺🇸 767 146 12ms 4 Jul 2024 101st ComputerKWasTaken 🇺🇸 767 146 12ms 4 Jul 2024 101st hellwue 767 146 30ms 18 Jul 2024 101st btjones0 767 146 9ms 7 Feb 2025 105th fgrosshans 🇫🇷 757 148 9ms 9 Jul 2024 106th StefanHabel 🇨🇦 752 149 11ms 22 Mar 2025 106th luuumine 🇫🇷 752 149 10ms 1 Dec 2025 108th BREMAUCY 🇫🇷 747 150 10ms 3 Jul 2024 109th roguh 🇬🇹 742 151 10ms 30 Jul 2024 109th 051 🇸🇬 742 151 15ms 5 Feb 2026 111th hiichbindermax 737 152 10ms 15 Jul 2024 111th RaBa21 🇭🇺 737 152 10ms 12 Jul 2025 111th InigoK 🇺🇸 737 152 214ms 4 Sep 2025 111th Andrey2001 737 152 11ms 17 Dec 2025 115th leon-w 732 153 11ms 24 Jul 2024 116th HumanoidCPU 718 156 10ms 1 Jul 2024 116th CutSandstone 718 156 10ms 2 Jul 2024 118th mbittner20 713 157 10ms 11 Jul 2024 118th Vaekor 713 157 10ms 23 Jul 2024 118th theadamabrams 713 157 11ms 26 Dec 2024 121st jacekwladzinski 704 159 10ms 7 Oct 2025 122nd vgamula 🇺🇦 700 160 31ms 3 Jul 2024 123rd JOrE20 696 161 10ms 5 Feb 2026 124th jtaxen 691 162 12ms 2 Jul 2024 124th nstearns96 🇬🇧 691 162 11ms 9 Jul 2024 124th wuzekai518 691 162 12ms 23 Jul 2024 127th Pyroan 687 163 10ms 14 May 2025 128th OCNeve 683 164 10ms 3 Jul 2024 128th muser-logiccpu 🇺🇦 683 164 10ms 9 Aug 2025 130th AtengChen 679 165 11ms 14 Aug 2024 131st jatloe 667 168 11ms 24 Aug 2024 131st SB-945 667 168 11ms 10 Jan 2025 133rd marcin7Cd 659 170 9ms 11 Jul 2024 133rd YAJUE114514 659 170 11ms 31 Jul 2025 135th sheen4n 655 171 11ms 21 Jul 2024 135th dokutan 655 171 10ms 11 Jan 2026 137th klixel 🇨🇦 647 173 13ms 20 Jan 2025 138th croc54 644 174 9ms 17 Jan 2025 139th coldham10 629 178 11ms 13 Jan 2026 140th madex 🇩🇪 622 180 10ms 1 Jul 2024 141st robin-scragg 605 185 11ms 5 Jul 2025 142nd ginop 602 186 9ms 2 Jul 2024 142nd inverseLorentz 🇦🇺 602 186 11ms 8 Jul 2024 144th OllieBoyne 🇬🇧 593 189 11ms 12 Jul 2024 145th tomh1012 586 191 10ms 21 Jan 2026 146th Mabeloid 🇳🇴 580 193 11ms 11 Sep 2024 147th zt14427 552 203 9ms 1 Jul 2024 148th jameswmccarty 507 221 10ms 10 Jul 2024 149th azure-blondon 491 228 10ms 7 Jul 2024 150th yuchuehw 489 229 11ms 5 Jul 2024 151st TheZwierzLF 🇵🇱 463 242 13ms 25 Nov 2025 152nd galloj 🇨🇿 461 243 15ms 26 Aug 2024 153rd Zhenyu-Bo 406 276 10ms 1 Aug 2025 154th AidanWalter 156 716 11ms 3 Jan 2025 First Prev 81–154 of 154