The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Quine 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 641st sisyphus-ppcg 🇦🇺 950 17 270ms 15 Jan 2022 641st dcgjb 950 17 247ms 11 Jan 2024 641st jborean93 950 17 268ms 6 May 2024 641st IISResetMe 950 17 251ms 6 May 2024 641st corbob 🇨🇦 950 17 226ms 6 May 2024 641st indented-automation 950 17 254ms 7 May 2024 641st JPRuskin 🇬🇧 950 17 268ms 7 May 2024 641st Feniske 🇫🇷 950 17 261ms 14 May 2024 641st MaxCastella 🇫🇷 950 17 249ms 30 May 2024 641st sean-niemann 🇺🇸 950 17 297ms 7 Apr 2025 651st somebody1234 948 26 5ms 23 Mar 2018 651st thospel 948 26 5ms 15 Apr 2018 651st stassats 948 26 5ms 28 Apr 2018 651st cam-lambda 948 26 4ms 30 Apr 2018 651st Deepztream 948 26 5ms 2 Sep 2018 651st primo-ppcg 🇹🇭 948 26 5ms 19 Oct 2018 651st prplz 🇦🇺 948 26 4ms 20 Nov 2018 651st rambox11 948 26 4ms 30 Jan 2019 651st villfa 948 26 4ms 27 May 2019 651st Lydxn 🇨🇦 948 26 5ms 18 Jun 2019 651st AgathokakologicalBit 948 26 4ms 14 Jul 2019 651st TFeld00 🇩🇰 948 26 4ms 7 Aug 2019 651st andersk 🇺🇸 948 26 4ms 19 Mar 2020 651st alexjlaberge 948 26 4ms 27 Jul 2020 651st itiievskyi 🇺🇦 948 26 4ms 19 Aug 2020 651st o0lit3 🇺🇸 948 26 5ms 2 Oct 2020 651st orthoplex 🇨🇽 948 26 5ms 4 Oct 2020 651st GrayJoKing 🇦🇺 948 26 4ms 20 Oct 2020 651st rucin93 🇵🇱 948 26 5ms 13 Nov 2020 651st sisyphus-ppcg 🇦🇺 948 26 5ms 24 Dec 2020 651st janbehrens 🇩🇪 948 26 5ms 3 Jan 2021 651st marcin7Cd 948 26 5ms 27 Jan 2021 651st Shanethegamer 🇺🇸 948 26 5ms 27 Jan 2021 651st SnowballSH 948 26 5ms 28 Jan 2021 651st BBoehm 🇩🇪 948 26 4ms 10 Feb 2021 651st JayXon 🇺🇸 948 26 4ms 14 Apr 2021 651st MeWhenI 🇻🇦 948 26 4ms 1 May 2021 651st KatieLG 🇬🇧 948 26 5ms 25 May 2021 651st RYNO8 948 26 4ms 8 Aug 2021 651st madex 🇩🇪 948 26 4ms 29 Aug 2021 651st olivermrose 🇺🇸 948 26 5ms 31 Aug 2021 651st ai-fischer 948 26 5ms 2 Oct 2021 651st tegenton 948 26 4ms 4 Oct 2021 651st ozefe 🇹🇷 948 26 4ms 28 Oct 2021 651st shellbertt 🇨🇦 948 26 4ms 3 Nov 2021 651st two-bad 🇬🇧 948 26 4ms 5 Dec 2021 651st SirBogman 🇺🇸 948 26 5ms 15 Dec 2021 651st scpchicken 🇵🇼 948 26 5ms 12 Jan 2022 651st voytxt 🇨🇿 948 26 5ms 17 Mar 2022 651st m-tkach 🇺🇦 948 26 5ms 18 May 2022 651st lynn 948 26 5ms 24 May 2022 651st solmyr2000 948 26 4ms 15 Jun 2022 651st yzhs 🇩🇪 948 26 5ms 23 Jun 2022 651st michael-pruglo 🇺🇦 948 26 5ms 6 Jul 2022 651st Steffan153 🇫🇮 948 26 4ms 25 Sep 2022 651st 4hg 🇺🇸 948 26 4ms 17 Oct 2022 651st DialFrost 🇸🇬 948 26 4ms 8 Nov 2022 651st DaCuteRaccoon 948 26 5ms 1 Dec 2022 651st MCausc78 🇺🇦 948 26 5ms 5 Jan 2023 651st AlephSquirrel 948 26 5ms 21 Jan 2023 651st ovs-code 🇩🇪 948 26 5ms 25 Jan 2023 651st neel11235813 948 26 4ms 13 Mar 2023 651st Dominoscompute 948 26 5ms 20 Apr 2023 651st Yewzir 🇧🇪 948 26 4ms 26 May 2023 651st StHagel 948 26 5ms 3 Aug 2023 651st ndren 948 26 4ms 6 Aug 2023 651st Siri-chan 948 26 4ms 17 Aug 2023 651st stackofbears 948 26 5ms 10 Sep 2023 651st snoozingnewt 🇨🇦 948 26 5ms 15 Sep 2023 651st madeforlosers 948 26 5ms 5 Apr 2024 651st pardouin 🇫🇷 948 26 4ms 19 Jul 2024 651st CaedenHarper 🇨🇦 948 26 5ms 5 Aug 2024 651st kg583 🇺🇸 948 26 4ms 10 Sep 2024 651st duckyluuk 🇳🇱 948 26 5ms 19 Sep 2024 651st xsot 🇸🇬 948 26 5ms 5 Oct 2024 651st edsrzf 🇳🇿 948 26 4ms 23 Oct 2024 651st dokutan 948 26 5ms 30 Oct 2024 651st FlyingPenguin223 948 26 4ms 27 Nov 2024 651st lifthrasiir 🇰🇷 948 26 5ms 27 Nov 2024 651st GolfingSuccess 🇬🇷 948 26 5ms 22 Dec 2024 First Prev 641–720 of 5,781 Next Last
