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?
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 800th mrmena 🇦🇺 396 273 11ms 19 Jun 2021 800th eddvrs 396 273 31ms 22 Dec 2023 803rd MeWhenI 🇻🇦 396 318 5ms 12 Aug 2024 804th Pie42 395 204 186ms 18 Apr 2021 805th proton 🇩🇪 394 192 39ms 20 Jun 2020 806th TimCurwick 🇺🇸 394 265 282ms 30 Nov 2020 807th KatieLG 🇬🇧 394 431 6ms 11 Dec 2023 808th mothcolada 🇺🇸 393 275 11ms 4 Dec 2020 808th Trunksistor 🇫🇷 393 275 11ms 9 May 2022 808th hiichbindermax 393 275 11ms 8 Sep 2024 811th madex 🇩🇪 393 493 4ms 14 days ago 812th stordev 392 276 11ms 26 Feb 2021 812th FortuiteMan 🇫🇷 392 276 10ms 8 Sep 2023 812th fgrosshans 🇫🇷 392 276 10ms 22 Jul 2024 815th janga1 391 277 14ms 22 Aug 2021 815th joonaspu 391 277 12ms 4 Jun 2023 817th SB-945 390 496 4ms 20 Oct 2023 818th KatieLG 🇬🇧 390 525 9ms 12 Dec 2024 819th dokutan 390 1,618 59ms 6 Dec 2023 820th haydenridd 389 278 11ms 2 Jul 2020 820th P-Quentin 🇫🇷 389 278 11ms 5 Aug 2022 820th Starwort 🇬🇧 389 278 11ms 11 Nov 2022 820th PotatoSaladOverlord 389 278 11ms 21 May 2025 824th dokutan 389 449 272ms 3 Feb 2026 825th skps2010 388 279 17ms 19 Jun 2019 825th madex 🇩🇪 388 279 12ms 7 Mar 2024 827th snoozingnewt 🇨🇦 387 403 103ms 22 Oct 2023 828th Natanaelel 🇸🇪 386 502 4ms 23 May 2025 829th KatieLG 🇬🇧 386 519 146ms 15 Oct 2022 830th KatieLG 🇬🇧 386 562 162ms 23 Mar 2024 831st dranjohn 385 281 10ms 24 Sep 2023 831st yokasuretsu 385 281 10ms 11 Jul 2025 833rd 5pyr 385 381 2ms 16 May 2023 834th HerLovelyTentacles 384 282 11ms 8 Feb 2021 834th jameslindesay 384 282 10ms 25 Feb 2021 834th myleopard 384 282 12ms 13 Oct 2021 837th squadb3 384 335 13ms 10 Oct 2019 838th cros107 🇦🇺 382 283 10ms 26 Sep 2024 839th dokutan 381 321 4ms 12 Feb 2025 840th dokutan 381 338 11ms 4 Aug 2024 841st n1LS 380 199 41ms 26 Sep 2019 842nd BraedenMooreDev 380 285 16ms 29 Oct 2023 842nd wh3n3v3r 🇨🇿 380 285 11ms 8 Nov 2024 842nd KadinSchultz 380 285 10ms 2 days ago 845th KatieLG 🇬🇧 380 710 1,588ms 13 Jan 2025 846th BrettMerri 379 340 13ms 2 Dec 2021 847th MeWhenI 🇻🇦 379 646 1,440ms 11 May 2021 848th sciencejiho 378 286 10ms 26 Apr 2024 848th RedzGoose 🇦🇺 378 286 11ms 23 Oct 2024 850th shaunjc 378 390 5ms 15 Aug 2022 851st dokutan 378 474 1,021ms 4 Feb 2025 852nd n1LS 377 287 14ms 25 Sep 2019 853rd hellwue 376 288 12ms 14 Feb 2023 854th MeWhenI 🇻🇦 375 937 71ms 8 Jul 2021 855th DrPrettyman 374 289 16ms 24 Jul 2023 856th KatieLG 🇬🇧 374 479 1,020ms 17 Mar 2024 857th KatieLG 🇬🇧 373 468 232ms 10 Oct 2021 858th Kloppermand 🇩🇰 372 291 13ms 1 Dec 2021 858th abba23 372 291 11ms 26 May 2022 860th cmayer777 372 577 76ms 14 Oct 2022 861st olivermrose 🇺🇸 371 204 41ms 12 Oct 2021 862nd epic-programmer-guy 371 292 10ms 31 Dec 2023 863rd KatieLG 🇬🇧 371 519 100ms 25 Apr 2022 864th nephila-nacrea 🇬🇧 370 280 3ms 28 Jun 2019 865th tadd 369 205 37ms 16 Apr 2020 866th wenbang24 369 293 10ms 29 Apr 2024 866th cingulataluke 369 293 16ms 3 Jun 2024 866th jtaxen 369 293 10ms 31 Oct 2024 869th vprab 368 294 12ms 10 Dec 2020 870th CheeseCake628 🇳🇴 367 276 546ms 18 Oct 2025 871st Agazoth 367 284 268ms 8 Jun 2020 872nd amishtal 366 296 10ms 2 Dec 2019 872nd jhpaques 🇫🇷 366 296 24ms 2 Aug 2022 872nd Mikey-Beep 🇬🇧 366 296 12ms 28 Aug 2023 872nd jameswmccarty 366 296 11ms 14 Feb 2026 876th cbrt-x 365 488 695ms 4 Sep 2021 877th heypwesto 🇳🇿 363 285 3ms 18 Apr 2021 878th pandapawskat 363 339 2ms 4 Oct 2021 879th KatieLG 🇬🇧 362 209 37ms 3 May 2021 880th starfihs 362 299 10ms 18 Aug 2024 First Prev 801–880 of 1,133 Next Last
