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?
ASCII Table 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 721st janbehrens 🇩🇪 684 100 260ms 3 Dec 2023 722nd KrausRaus 🇺🇸 684 143 10ms 28 Mar 2022 722nd didion0 🇺🇸 684 143 10ms 14 Apr 2022 722nd tayloia 🇬🇧 684 143 11ms 12 Jan 2023 725th timhaj 🇸🇮 684 173 461ms 2 Aug 2024 726th snoozingnewt 🇨🇦 684 194 105ms 1 Nov 2025 727th snoozingnewt 🇨🇦 682 143 1ms 23 Sep 2023 727th FortuiteMan 🇫🇷 682 143 1ms 10 Oct 2024 727th LvLError 682 143 2ms 29 May 2025 730th snoozingnewt 🇨🇦 681 164 113ms 2 Nov 2025 731st Shanethegamer 🇺🇸 680 121 75ms 11 May 2025 732nd R4z0rX 679 144 12ms 21 Aug 2024 732nd xyangst 679 144 10ms 15 Oct 2024 734th CaedenHarper 🇨🇦 679 177 401ms 21 Oct 2025 735th weeble 678 127 4ms 18 Aug 2024 736th ImpressedByRocks 677 100 10ms 26 May 2022 737th MWI-polygolf 677 160 123ms 29 Dec 2023 738th GrayJoKing 🇦🇺 676 91 36ms 11 Aug 2024 738th denkyuu1 676 91 35ms 2 days ago 740th Babafaba 675 96 355ms 30 Oct 2025 741st p-vf 🇨🇭 675 178 413ms 13 Jul 2022 742nd Yewzir 🇧🇪 674 132 7ms 16 Dec 2023 743rd Andrey-Plotnikov 674 145 9ms 20 Jun 2025 743rd Yax42 🇫🇷 674 145 10ms 20 Jan 2026 745th snoozingnewt 🇨🇦 674 197 151ms 2 Nov 2025 746th prplz 🇦🇺 673 145 1ms 27 Mar 2022 746th jgbaldwinbrown 673 145 2ms 28 Jun 2022 746th Us1ngTh3Hub 673 145 1ms 21 Jun 2023 746th aevykt 673 145 2ms 29 Oct 2023 750th SwordF-Official 🇺🇸 673 165 2ms 17 Jun 2025 751st clockworknazo 672 130 3ms 27 Aug 2023 752nd tlucanti 🇷🇺 672 176 61ms 8 Jan 2024 752nd yeminghan2021 672 176 61ms 2 Feb 2025 754th kimbo 🇺🇸 672 211 294ms 28 Dec 2022 755th scpchicken 🇵🇼 671 76 3ms 26 Mar 2022 756th kmathis22 671 190 373ms 20 Nov 2025 757th wh3n3v3r 🇨🇿 670 101 10ms 7 Nov 2024 758th NewDefectus 🇮🇱 670 146 12ms 10 Jun 2022 758th BambooleanLogic 🇸🇪 670 146 9ms 6 Dec 2022 758th tiadrop 670 146 11ms 7 Jan 2024 761st dokutan 670 147 164ms 5 Aug 2024 762nd msbranicky 670 225 26ms 3 Jan 2024 763rd jipsong 🇩🇪 669 123 79ms 1 May 2025 764th MeWhenI 🇻🇦 669 243 1ms 12 May 2022 765th MeWhenI 🇻🇦 669 246 1,985ms 7 Nov 2025 766th funnyboy-roks 668 146 1ms 15 Jun 2024 767th syntax-rules 668 160 5ms 15 May 2023 768th Kaminate 668 177 61ms 5 Aug 2022 769th adriweb 🇫🇷 667 132 4ms 14 Aug 2023 770th snoozingnewt 🇨🇦 666 146 1ms 1 Nov 2025 771st helbling 🇨🇭 665 147 10ms 22 Apr 2024 772nd Yewzir 🇧🇪 665 149 4ms 14 May 2023 773rd prestosilver 🇺🇸 665 178 426ms 18 days ago 774th AlephSquirrel 664 102 11ms 21 May 2023 775th warmCabin 664 147 1ms 8 Apr 2022 775th CaedenHarper 🇨🇦 664 147 1ms 19 Jan 2025 777th sultan 664 192 430ms 28 Feb 2024 778th ovs-code 🇩🇪 663 82 111ms 4 Jan 2024 779th OhmNomNom 661 93 35ms 20 Oct 2022 780th Argeento 🇵🇱 661 148 10ms 15 Sep 2023 781st Shanethegamer 🇺🇸 660 155 42ms 13 Feb 2025 782nd Zxnii 659 148 1ms 24 May 2023 783rd edsrzf 🇳🇿 658 67 38ms 6 Nov 2025 784th GrayJoKing 🇦🇺 658 121 142ms 11 Aug 2024 785th Verlio-H 658 129 40ms 17 Feb 2025 786th bizy-coder 657 103 10ms 28 Jan 2023 786th bzijlema 🇳🇱 657 103 9ms 8 Aug 2024 786th KasperKivimaeki 🇫🇮 657 103 10ms 25 Oct 2025 789th tofuweasel 657 104 239ms 9 Jun 2022 790th jacobly0 🇺🇸 657 139 2ms 10 Oct 2023 791st MWI-polygolf 657 169 1ms 6 Dec 2023 792nd ovs-code 🇩🇪 656 80 31ms 14 Nov 2025 793rd ovs-code 🇩🇪 656 149 11ms 28 Mar 2022 793rd stefangimmillaro 656 149 9ms 2 Oct 2022 793rd coreynash 656 149 12ms 2 Dec 2022 796th hotmanga 656 216 285ms 25 Oct 2023 797th kallmi28 🇨🇿 655 149 2ms 2 Oct 2023 797th MistMech 655 149 2ms 29 Oct 2023 799th gifti258 655 150 70ms 13 Sep 2023 800th sisyphus-ppcg 🇦🇺 654 78 3ms 5 Dec 2022 First Prev 721–800 of 2,313 Next Last