The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Arabic to Roman in all languages 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 74th Lydxn 🇨🇦 969 53 203ms 28 Sep 2023 74th Yewzir 🇧🇪 969 53 199ms 19 Nov 2023 74th error256 969 53 186ms 14 May 2024 74th pardouin 🇫🇷 969 53 213ms 27 Aug 2024 74th edsrzf 🇳🇿 969 53 219ms 25 Sep 2024 74th DialFrost 🇸🇬 969 53 206ms 26 Sep 2024 74th Shanethegamer 🇺🇸 969 53 196ms 24 Nov 2024 74th GolfingSuccess 🇬🇷 969 53 211ms 14 Feb 2025 74th sean-niemann 🇺🇸 969 53 217ms 7 Apr 2025 74th fuzzylojik-golf 🇺🇸 969 53 226ms 17 Sep 2025 74th snoozingnewt 🇨🇦 969 53 222ms 7 Oct 2025 74th JayXon 🇺🇸 969 53 197ms 2 Nov 2025 93rd primo-ppcg 🇹🇭 966 50 144ms 6 Dec 2022 94th primo-ppcg 🇹🇭 966 95 33ms 5 Oct 2020 94th Argeento 🇵🇱 966 95 39ms 8 Oct 2020 94th rucin93 🇵🇱 966 95 30ms 9 Oct 2020 94th sean-niemann 🇺🇸 966 95 29ms 5 Jun 2024 94th Steffan153 🇫🇮 966 95 29ms 10 hours ago 99th kartik-s 965 50 18ms 15 Apr 2018 99th StavromulaBeta 965 50 16ms 12 Apr 2019 99th ai-fischer 965 50 17ms 1 Oct 2021 99th Yewzir 🇧🇪 965 50 20ms 18 Feb 2024 99th wh3n3v3r 🇨🇿 965 50 17ms 8 Nov 2024 99th yokasuretsu 965 50 21ms 14 Jan 2025 99th plcc0 965 50 19ms 26 Mar 2025 99th JOrE20 965 50 19ms 29 Dec 2025 107th lynn 959 57 45ms 22 Aug 2024 107th MeWhenI 🇻🇦 959 57 43ms 22 Aug 2024 107th Steffan153 🇫🇮 959 57 45ms 22 Aug 2024 107th dokutan 959 57 45ms 25 Aug 2024 107th kg583 🇺🇸 959 57 42ms 27 Aug 2024 107th Shanethegamer 🇺🇸 959 57 43ms 27 Aug 2024 107th pardouin 🇫🇷 959 57 44ms 4 Sep 2024 107th AlephSquirrel 959 57 44ms 8 Sep 2024 107th edsrzf 🇳🇿 959 57 47ms 17 Sep 2024 107th DialFrost 🇸🇬 959 57 46ms 6 Dec 2024 107th emgordon154 959 57 48ms 13 Dec 2024 107th CLOStrophobic 🇮🇹 959 57 44ms 21 Jan 2025 107th GolfingSuccess 🇬🇷 959 57 43ms 14 Feb 2025 107th ian-h-chamberlain 🇺🇸 959 57 47ms 18 Oct 2025 107th snoozingnewt 🇨🇦 959 57 45ms 18 Oct 2025 122nd ovs-code 🇩🇪 958 126 40ms 9 Feb 2025 123rd gifti258 951 54 189ms 18 Sep 2023 123rd MeWhenI 🇻🇦 951 54 200ms 6 Nov 2023 123rd BREMAUCY 🇫🇷 951 54 234ms 7 May 2024 126th sisyphus-ppcg 🇦🇺 951 66 7ms 9 Dec 2021 126th saito-ta 🇯🇵 951 66 7ms 19 Jul 2025 128th Lydxn 🇨🇦 951 86 46ms 18 Jul 2025 128th radarek 🇵🇱 951 86 45ms 19 Jul 2025 130th Attero 🇸🇪 946 51 22ms 14 Oct 2020 130th janbehrens 🇩🇪 946 51 19ms 29 Mar 2021 130th orthoplex 🇨🇽 946 51 21ms 25 Jul 2021 130th NewDefectus 🇮🇱 946 51 20ms 1 Oct 2021 130th scpchicken 🇵🇼 946 51 21ms 7 Mar 2022 130th inventshah 946 51 21ms 8 May 2022 130th jacobly0 🇺🇸 946 51 21ms 2 Sep 2023 130th lifthrasiir 🇰🇷 946 51 20ms 30 Nov 2024 138th ovs-code 🇩🇪 946 108 11ms 13 Feb 2024 139th jkelly467 943 58 42ms 9 Jan 2026 140th nwellnhof 🇩🇪 943 72 668ms 29 Jun 2023 141st Steffan153 🇫🇮 940 73 46ms 12 Dec 2023 141st MeWhenI 🇻🇦 940 73 39ms 13 Dec 2023 141st Shanethegamer 🇺🇸 940 73 48ms 19 Dec 2023 141st m-tkach 🇺🇦 940 73 47ms 2 Feb 2024 141st dokutan 940 73 37ms 7 May 2024 141st edsrzf 🇳🇿 940 73 39ms 5 Oct 2024 141st emgordon154 940 73 49ms 11 Dec 2024 141st GolfingSuccess 🇬🇷 940 73 35ms 14 Feb 2025 141st sean-niemann 🇺🇸 940 73 47ms 25 Apr 2025 141st error256 940 73 34ms 9 May 2025 141st vgamula 🇺🇦 940 73 37ms 14 Jul 2025 141st kg583 🇺🇸 940 73 34ms 29 Jul 2025 141st ZoDoneRightNow 940 73 47ms 13 Oct 2025 141st snoozingnewt 🇨🇦 940 73 47ms 22 Nov 2025 141st DialFrost 🇸🇬 940 73 32ms 2 Jan 2026 156th bitsandbeyond 🇳🇱 938 87 812ms 31 Jul 2025 157th nwellnhof 🇩🇪 938 127 502ms 29 Jun 2023 158th primo-ppcg 🇹🇭 937 67 7ms 5 Oct 2020 158th o0lit3 🇺🇸 937 67 9ms 6 Oct 2020 158th kurkale6ka 937 67 8ms 6 Sep 2021 First Prev 81–160 of 1,913 Next Last