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 721st kmathis22 433 447 4ms 8 Oct 2025 722nd gnlow 🇰🇷 431 299 12ms 26 Apr 2020 723rd josh-h-90 431 342 5ms 17 Aug 2022 724th yuchuehw 429 252 10ms 11 Jan 2024 725th zakariamouhid 429 300 13ms 12 Jan 2023 726th camieac 🇬🇧 428 253 11ms 20 Aug 2023 727th CaedenHarper 🇨🇦 428 447 418ms 17 Oct 2025 728th juliansiebert 🇩🇪 426 245 277ms 19 Dec 2022 729th marcin7Cd 426 254 12ms 17 Dec 2020 729th inverseLorentz 🇦🇺 426 254 10ms 21 Jun 2022 729th bbnumber2 426 254 17ms 29 Oct 2023 729th TheZwierzLF 🇵🇱 426 254 13ms 24 Nov 2025 733rd lewdev 🇺🇸 426 302 11ms 31 Oct 2024 734th blaztoma 🇱🇹 425 178 39ms 16 Jan 2026 735th msbranicky 425 238 562ms 16 Jan 2024 736th guliyevemil1 🇦🇿 424 255 11ms 16 Apr 2020 736th j21marshall 424 255 14ms 7 Aug 2020 736th MaxElf999 424 255 13ms 28 Sep 2022 739th lyphyser 424 304 11ms 17 Jul 2023 740th DevinJFarmer 424 441 2ms 29 Oct 2023 741st Chinay-Domitrix 🇺🇸 423 364 4,047ms 26 days ago 742nd jjatria 422 191 149ms 7 Jul 2020 743rd Yewzir 🇧🇪 422 240 509ms 15 Jan 2024 744th adoxography 420 180 33ms 10 Mar 2020 745th TheZwierzLF 🇵🇱 420 241 525ms 24 Nov 2025 746th MaxCastella 🇫🇷 419 249 315ms 14 Nov 2022 747th mcculloughjchris 419 307 12ms 16 Dec 2022 748th OSYCh314 🇦🇺 418 259 11ms 16 Feb 2026 749th CaedenHarper 🇨🇦 418 308 13ms 29 Aug 2025 750th Zach1031 418 463 8ms 18 Nov 2025 751st lowlighter 417 309 12ms 30 Oct 2020 752nd Florian-Mt 416 260 10ms 20 Nov 2023 753rd DarkTemplar5 415 261 17ms 22 Feb 2020 754th MeWhenI 🇻🇦 415 475 2ms 9 Feb 2022 755th dokutan 414 377 108ms 20 Apr 2025 756th hiddicop 🇸🇪 413 183 36ms 1 Feb 2021 757th lmolteno 413 262 11ms 9 Mar 2021 758th Designer023 413 312 11ms 13 Feb 2020 759th cafehaine 🇫🇷 413 355 2ms 24 Jun 2019 760th Relinator 412 253 255ms 27 Apr 2023 761st pascscha 411 263 11ms 28 Mar 2022 761st Vilzku 411 263 15ms 14 Oct 2022 763rd dokutan 411 405 3ms 27 Feb 2026 764th RandGuy 410 264 11ms 16 Nov 2022 764th roguh 🇬🇹 410 264 11ms 25 Jan 2024 766th mintypython 409 315 13ms 11 Aug 2019 766th CatsAreFluffy 409 315 13ms 8 Feb 2023 766th owen-c-parker 🇺🇸 409 315 12ms 18 Nov 2023 769th Shanethegamer 🇺🇸 406 361 2ms 6 Apr 2022 770th KatieLG-Transpiler 🇬🇧 406 582 2ms 8 Oct 2023 771st cure-honey 🇯🇵 406 682 42ms 6 May 2020 772nd akira-aizawa 🇯🇵 405 267 10ms 29 Oct 2020 772nd kenny14231 405 267 12ms 5 Aug 2022 774th Ashikpaul 🇮🇳 405 318 14ms 9 May 2021 775th dokutan 405 666 1,605ms 12 Jan 2025 776th MeWhenI 🇻🇦 405 667 8ms 28 Nov 2023 776th KatieLG 🇬🇧 405 667 7ms 12 Oct 2025 778th dokutan 404 187 38ms 23 Apr 2025 779th Fracture17 404 268 10ms 15 Apr 2023 779th chichha 404 268 10ms 30 Jan 2024 779th 4ndyJ 🇬🇧 404 268 13ms 31 Jan 2024 782nd jstein-praxis 404 473 509ms 21 Nov 2021 783rd rvdnieuwendijk 🇳🇱 403 259 271ms 4 Aug 2020 784th c0d3-4-F00d 🇩🇪 403 464 2ms 6 Jan 2022 785th mbittner20 402 269 13ms 27 May 2023 786th greenstuartj 401 201 167ms 31 Aug 2023 787th AkashTandon167 401 270 11ms 29 Dec 2020 787th kayaulai 401 270 17ms 23 Nov 2025 789th KatieLG 🇬🇧 400 584 392ms 8 Apr 2022 790th NicoAdams 399 271 13ms 22 Nov 2021 790th Stockoh 🇫🇷 399 271 10ms 1 May 2024 790th codingisgreatbutiamnot 399 271 15ms 23 Aug 2024 793rd ereztaiar 🇮🇱 399 323 11ms 7 Sep 2021 793rd smclaughlin-cf 399 323 11ms 24 Feb 2025 795th staehlii 398 272 11ms 16 Jun 2022 796th JRaspass 🇬🇧 398 412 3ms 1 Oct 2022 797th dokutan 397 286 142ms 7 Aug 2024 798th KatieLG 🇬🇧 397 590 42ms 23 Mar 2024 799th ian-h-chamberlain 🇺🇸 396 273 10ms 29 Dec 2019 799th mrmena 🇦🇺 396 273 11ms 19 Jun 2021 First Prev 721–800 of 1,132 Next Last
