The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Rock-paper-scissors-Spock-lizard 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 638th stertooy 🇧🇪 468 231 11ms 14 Jun 2024 638th denisfouchard 468 231 17ms 21 Aug 2025 643rd arctouch-cristiannevianna 468 409 544ms 4 Mar 2024 644th KatieLG 🇬🇧 467 276 12ms 4 Feb 2022 644th two-bad 🇬🇧 467 276 14ms 5 Feb 2024 644th Cube14yt 467 276 12ms 13 Nov 2025 647th Psirving 466 232 11ms 31 Jul 2020 648th pyrolitic 🇮🇪 465 402 2ms 25 Apr 2022 649th bbakersmith 464 233 10ms 28 Jun 2022 649th 40fied4t 464 233 11ms 6 May 2025 651st h3ra993huskp 🇯🇵 464 384 753ms 30 Nov 2025 652nd snoozingnewt 🇨🇦 464 415 113ms 8 Oct 2025 653rd MeWhenI 🇻🇦 462 360 3ms 26 Aug 2023 654th Laksen 🇩🇰 461 762 27ms 8 Jul 2021 655th hoodadam 460 235 18ms 13 Mar 2020 655th bastienvoirin 🇫🇷 460 235 11ms 8 Apr 2020 655th itiievskyi 🇺🇦 460 235 22ms 3 Aug 2020 655th joshmoody24 460 235 19ms 4 Mar 2022 655th markusgraube 460 235 11ms 8 Apr 2024 660th raphaelimahorn 460 280 13ms 15 Oct 2020 661st MeWhenI 🇻🇦 459 409 5ms 25 Nov 2023 662nd jared-hughes 458 165 37ms 3 Jan 2023 662nd denkyuu1 458 165 34ms 12 days ago 664th staufga0 458 236 11ms 30 Jan 2024 665th Y0UR-U5ERNAME 458 281 13ms 4 Sep 2021 666th RockOfStone 458 320 2ms 23 Mar 2024 667th henrytranter 455 238 11ms 7 Feb 2020 667th dahrens 455 238 10ms 14 May 2021 667th msbranicky 455 238 12ms 5 Jul 2023 670th BloodStormKnight 455 283 11ms 15 Oct 2022 671st acollett89 452 285 10ms 4 Aug 2025 672nd Yewzir 🇧🇪 451 240 11ms 19 May 2023 673rd evanbattaglia 450 168 36ms 23 Apr 2021 673rd jstanley0 450 168 35ms 24 Apr 2021 675th Trusly 449 241 10ms 27 Feb 2024 676th KevinMarquette 🇺🇸 448 233 253ms 5 Jun 2020 677th dokutan 448 523 43ms 1 May 2024 678th mossprescott 447 242 13ms 19 Jan 2023 679th scottjones4k 447 288 14ms 6 Jul 2022 680th DaCoolOne 447 328 2ms 20 Nov 2019 681st msbranicky 447 433 4ms 12 Sep 2023 682nd janbehrens 🇩🇪 447 480 3,115ms 20 Nov 2022 683rd MeWhenI 🇻🇦 446 226 294ms 15 Feb 2023 684th tommy-dronkers 446 289 12ms 8 Dec 2020 684th aydenp 🇨🇦 446 289 12ms 14 Nov 2021 686th neel11235813 446 434 4ms 10 Nov 2023 687th Lv0Sys 🇵🇱 445 170 39ms 3 Dec 2025 688th xyangst 445 243 12ms 15 Oct 2024 689th IISResetMe 444 235 291ms 6 Jun 2020 689th MeWhenI 🇻🇦 444 235 266ms 28 Jan 2023 691st wrhm 443 244 11ms 16 Dec 2020 691st hymanimy 443 244 10ms 20 Aug 2021 691st twocatsinatrenchcoat 443 244 13ms 25 Nov 2022 691st mathisfun271 443 244 11ms 7 Feb 2024 691st Pyroan 443 244 12ms 27 Feb 2025 696th tdkkdt 🇷🇺 443 432 456ms 21 Nov 2021 697th sambirnbaum1 442 245 10ms 12 Oct 2019 697th kypi 442 245 24ms 22 Feb 2020 697th guilhem-roy 🇫🇷 442 245 11ms 7 Mar 2022 697th BREMAUCY 🇫🇷 442 245 12ms 33 hours ago 701st snoozingnewt 🇨🇦 440 440 4ms 14 Sep 2025 702nd dokutan 440 615 9ms 13 Sep 2025 703rd Ardena 439 172 38ms 23 Apr 2021 703rd GrayJoKing 🇦🇺 439 172 35ms 10 Feb 2023 703rd Shanethegamer 🇺🇸 439 172 35ms 4 Feb 2025 703rd tatzyr 🇯🇵 439 172 36ms 25 Mar 2025 707th KatieLG 🇬🇧 439 441 4ms 23 Mar 2024 708th JRaspass 🇬🇧 438 184 168ms 8 Jul 2019 709th Emutis 🇱🇹 438 247 10ms 24 Oct 2024 709th luuumine 🇫🇷 438 247 10ms 6 Oct 2025 711th warmCabin 438 335 2ms 22 Nov 2019 712th BrenSchaap 436 248 11ms 21 Oct 2021 712th resoNathan 436 248 11ms 19 Jun 2024 712th tomh1012 436 248 10ms 23 days ago 715th BREMAUCY 🇫🇷 435 445 4ms 22 May 2025 716th KatieLG 🇬🇧 435 564 1,496ms 23 Mar 2024 717th argusdusty 🇺🇸 434 249 10ms 27 Dec 2020 717th ffelixm 434 249 11ms 31 May 2025 719th E2dgar 434 297 11ms 31 Jan 2022 720th Indivicivet 433 250 10ms 19 Oct 2021 First Prev 641–720 of 1,132 Next Last
