The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Morse Encoder 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 801st Michiocre 221 493 11ms 18 Jun 2024 802nd Jacob385 221 628 421ms 23 Apr 2024 803rd RandGuy 218 490 423ms 14 Dec 2021 804th dokutan 218 664 44ms 13 Sep 2025 805th dokutan 217 860 61ms 3 Jul 2025 806th dokutan 216 523 5ms 20 Apr 2025 807th jjstreet 216 641 576ms 30 Apr 2020 808th HassanAliKadhem 🇧🇭 215 433 18ms 4 Jan 2022 809th Vaekor 213 437 10ms 16 Nov 2020 810th hklemp 🇩🇪 213 501 439ms 21 Nov 2021 811th calinous 🇷🇴 213 567 2ms 22 Mar 2022 812th dokutan 213 705 2ms 2 Jul 2025 813th dokutan 212 847 34ms 24 Feb 2026 814th Trunksistor 🇫🇷 211 441 11ms 19 Apr 2022 815th boxjelly 210 383 37ms 12 Feb 2021 816th NanduBC 210 445 12ms 23 Mar 2021 817th CutSandstone 209 446 16ms 5 Jul 2024 818th dokutan 209 681 1,021ms 4 Feb 2025 819th dokutan 208 345 3ms 12 Feb 2025 820th b4dpxl 206 452 10ms 4 Dec 2019 820th Andrey2001 206 452 11ms 31 Jan 2026 822nd Starwort 🇬🇧 204 457 12ms 4 Mar 2019 822nd RJFuller 204 457 10ms 23 Feb 2024 824th MeWhenI 🇻🇦 203 635 3ms 18 Nov 2023 825th dokutan 201 560 2ms 7 Apr 2023 826th MeWhenI 🇻🇦 200 737 1ms 8 Feb 2022 827th KatieLG 🇬🇧 200 850 250ms 20 May 2021 828th flaminggoat 199 606 2ms 24 Sep 2020 829th rollershutter 198 472 10ms 19 Jul 2023 829th HumanoidCPU 198 472 11ms 11 Jan 2026 831st MiffOttah 198 539 473ms 21 Nov 2021 832nd eclyptox 198 571 5ms 10 Oct 2024 833rd retrohun 198 758 1ms 9 Nov 2022 834th 21zz 196 475 10ms 2 Dec 2022 835th jessegyger 195 579 4ms 22 Oct 2022 836th dokutan 195 736 70ms 12 Mar 2025 837th eli-siegel 195 826 353ms 28 Jun 2023 838th aglahir1 193 483 13ms 21 Jul 2022 839th vonKrafft 192 486 10ms 26 Mar 2020 840th mothcolada 🇺🇸 191 487 10ms 11 Mar 2021 841st Yewzir 🇧🇪 190 454 732ms 15 Jan 2024 842nd moshiba 190 490 10ms 18 Apr 2018 843rd ndren 190 681 2ms 9 Oct 2023 844th mazzegi 190 851 311ms 16 Apr 2020 845th KatieLG 🇬🇧 189 780 11ms 17 Jan 2025 846th MeWhenI 🇻🇦 187 911 300ms 28 Mar 2022 847th jtaxen 186 500 10ms 6 May 2024 848th twocatsinatrenchcoat 186 502 10ms 10 May 2022 849th HumanoidCPU 185 468 479ms 11 Jan 2026 850th valgardg 🇮🇸 185 504 10ms 10 Aug 2021 851st befoster 184 507 11ms 8 May 2021 852nd gigaprofisi 🇺🇸 183 597 11ms 10 Aug 2025 853rd JeromeSchweitzer 182 511 18ms 7 Sep 2020 853rd Drew-j-Smith 182 511 10ms 29 Mar 2022 855th kkoenig 182 885 321ms 4 Jan 2024 856th Stockoh 🇫🇷 181 515 10ms 5 Nov 2023 857th MyXoToD 🇩🇪 181 603 10ms 19 May 2025 858th iczelia 🇩🇪 180 606 13ms 23 Oct 2025 859th bobsbeenjamin 🇺🇸 179 522 13ms 10 Dec 2020 860th dokutan 179 850 409ms 23 Sep 2024 861st jameswmccarty 178 525 10ms 4 Nov 2024 862nd MeWhenI 🇻🇦 178 1,053 70ms 28 Mar 2022 863rd amishtal 176 530 13ms 5 Dec 2019 864th ArturLange 175 534 10ms 14 Sep 2018 864th DGipe 175 534 17ms 30 Apr 2024 866th dokutan 175 840 10ms 23 Feb 2026 867th KatieLG 🇬🇧 174 929 298ms 29 May 2021 868th vhoulbreque 🇫🇷 172 541 10ms 6 Apr 2024 869th adoxography 172 542 10ms 21 May 2018 870th KatieLG-Transpiler 🇬🇧 172 939 324ms 25 Sep 2022 871st KatieLG-Transpiler 🇬🇧 172 1,002 724ms 10 Jul 2022 872nd louisbosqui 169 551 11ms 30 Dec 2020 873rd kellantech 168 556 12ms 1 Jun 2023 874th hacker19374 167 652 12ms 9 Mar 2023 875th kurkale6ka 165 416 4ms 6 Aug 2021 876th HumanoidCPU 164 663 15ms 5 Feb 2025 877th KatieLG 🇬🇧 164 899 2ms 2 May 2021 878th dokutan 163 919 145ms 2 Dec 2025 879th dokutan 162 796 4ms 24 Dec 2024 880th KatieLG 🇬🇧 162 939 408ms 16 Jan 2023 First Prev 801–880 of 1,003 Next Last
