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?
Fibonacci in all languages 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 388th error256 965 23 1,273ms 10 May 2024 388th pardouin 🇫🇷 965 23 1,296ms 11 Apr 2025 388th DialFrost 🇸🇬 965 23 1,245ms 13 Apr 2025 388th fuzzylojik-golf 🇺🇸 965 23 1,255ms 13 Sep 2025 388th GolfingSuccess 🇬🇷 965 23 1,175ms 18 days ago 406th Lydxn 🇨🇦 965 30 2ms 19 Jan 2022 406th sisyphus-ppcg 🇦🇺 965 30 1ms 19 Jan 2022 406th primo-ppcg 🇹🇭 965 30 2ms 19 Jan 2022 406th dvargas46 🇺🇸 965 30 1ms 26 Jun 2022 406th saito-ta 🇯🇵 965 30 1ms 6 Oct 2022 406th Steffan153 🇫🇮 965 30 1ms 12 Feb 2026 412th achimkrause 965 35 114ms 11 Jul 2018 412th HPWiz 🇳🇿 965 35 122ms 17 Jul 2018 412th yanqui-uxo 965 35 122ms 6 Oct 2018 412th laikoni 965 35 112ms 27 Feb 2019 412th kops-cg 965 35 296ms 8 Apr 2021 412th xnor-gate 965 35 120ms 8 Apr 2021 412th sisyphus-ppcg 🇦🇺 965 35 117ms 3 May 2021 412th rak1507 🇬🇧 965 35 113ms 4 May 2021 412th lynn 965 35 119ms 5 Jun 2021 412th ssiquoya 🇷🇺 965 35 140ms 9 Jun 2021 412th Lydxn 🇨🇦 965 35 116ms 12 Jul 2021 412th JayXon 🇺🇸 965 35 117ms 15 Sep 2021 412th annaproxy 965 35 117ms 4 Jan 2022 412th btnlq 965 35 117ms 4 Feb 2022 412th arjanadriaanse 🇳🇱 965 35 123ms 10 Feb 2022 412th ovs-code 🇩🇪 965 35 130ms 6 Mar 2022 412th GrayJoKing 🇦🇺 965 35 115ms 10 Mar 2022 412th Sakisan 🇧🇪 965 35 119ms 5 Apr 2022 412th Shanethegamer 🇺🇸 965 35 120ms 7 Apr 2022 412th Steffan153 🇫🇮 965 35 121ms 17 Dec 2022 412th betaveros 965 35 124ms 4 Jan 2023 412th ashtraypettingzoo 🇺🇸 965 35 121ms 10 Feb 2023 412th aionescu 965 35 125ms 9 Apr 2023 412th sean-niemann 🇺🇸 965 35 114ms 1 Jul 2023 412th TrueBoxGuy 965 35 122ms 10 Aug 2023 412th stackofbears 965 35 114ms 9 Sep 2023 412th Natanaelel 🇸🇪 965 35 119ms 10 Jan 2024 412th orthoplex 🇨🇽 965 35 131ms 25 Jul 2024 412th DialFrost 🇸🇬 965 35 120ms 5 Aug 2024 412th pardouin 🇫🇷 965 35 117ms 22 Sep 2024 412th 09cf 965 35 118ms 9 May 2025 412th fuzzylojik-golf 🇺🇸 965 35 125ms 11 Sep 2025 412th edsrzf 🇳🇿 965 35 134ms 20 Dec 2025 445th Lydxn 🇨🇦 965 51 402ms 21 Nov 2021 445th billings7 🇬🇧 965 51 378ms 21 Nov 2021 445th JayXon 🇺🇸 965 51 399ms 21 Nov 2021 445th jwalaszek 965 51 388ms 21 Nov 2021 445th Kloppermand 🇩🇰 965 51 415ms 21 Nov 2021 445th lynn 965 51 397ms 21 Nov 2021 445th MatheusAvellar 🇧🇷 965 51 354ms 21 Nov 2021 445th Meowsan91 🇨🇿 965 51 384ms 21 Nov 2021 445th MeWhenI 🇻🇦 965 51 380ms 21 Nov 2021 445th mrondon8 965 51 397ms 21 Nov 2021 445th NewDefectus 🇮🇱 965 51 384ms 21 Nov 2021 445th nwellnhof 🇩🇪 965 51 384ms 21 Nov 2021 445th primo-ppcg 🇹🇭 965 51 368ms 21 Nov 2021 445th sean-niemann 🇺🇸 965 51 382ms 21 Nov 2021 445th shellbertt 🇨🇦 965 51 379ms 21 Nov 2021 445th sisyphus-ppcg 🇦🇺 965 51 373ms 21 Nov 2021 445th ssiquoya 🇷🇺 965 51 375ms 21 Nov 2021 445th thestretivibity 965 51 372ms 21 Nov 2021 445th tomtheisen 🇺🇸 965 51 386ms 21 Nov 2021 445th Trickermand 965 51 388ms 21 Nov 2021 445th voytasify 🇵🇱 965 51 384ms 21 Nov 2021 445th btnlq 965 51 390ms 28 Nov 2021 445th prplz 🇦🇺 965 51 384ms 7 Jan 2022 445th GrayJoKing 🇦🇺 965 51 376ms 17 Oct 2022 445th DialFrost 🇸🇬 965 51 365ms 7 Jan 2023 445th Steffan153 🇫🇮 965 51 380ms 28 Jan 2023 445th peeveen 🇬🇧 965 51 387ms 15 Sep 2023 445th Herbert00709 🇵🇱 965 51 372ms 18 Nov 2023 445th roupiq 🇵🇱 965 51 377ms 19 Feb 2024 445th Mandrzejy 🇵🇱 965 51 351ms 27 Mar 2024 445th jipsong 🇩🇪 965 51 392ms 13 Jun 2024 445th namelessiw 965 51 390ms 13 Jun 2024 445th Jacob385 965 51 381ms 30 Jul 2024 445th pardouin 🇫🇷 965 51 435ms 24 Sep 2024 445th stefangimmillaro 965 51 438ms 24 Sep 2024 445th b-illy 🇬🇧 965 51 383ms 17 Jan 2025 First Prev 401–480 of 9,824 Next Last