The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 801st MeWhenI 🇻🇦 396 318 5ms 12 Aug 2024 802nd Pie42 395 204 186ms 18 Apr 2021 803rd proton 🇩🇪 394 192 39ms 20 Jun 2020 804th TimCurwick 🇺🇸 394 265 282ms 30 Nov 2020 805th KatieLG 🇬🇧 394 431 6ms 11 Dec 2023 806th mothcolada 🇺🇸 393 275 11ms 4 Dec 2020 806th Trunksistor 🇫🇷 393 275 11ms 9 May 2022 806th hiichbindermax 393 275 11ms 8 Sep 2024 809th madex 🇩🇪 393 493 4ms 11 days ago 810th stordev 392 276 11ms 26 Feb 2021 810th FortuiteMan 🇫🇷 392 276 10ms 8 Sep 2023 810th fgrosshans 🇫🇷 392 276 10ms 22 Jul 2024 813th janga1 391 277 14ms 22 Aug 2021 813th joonaspu 391 277 12ms 4 Jun 2023 815th SB-945 390 496 4ms 20 Oct 2023 816th KatieLG 🇬🇧 390 525 9ms 12 Dec 2024 817th dokutan 390 1,618 59ms 6 Dec 2023 818th haydenridd 389 278 11ms 2 Jul 2020 818th P-Quentin 🇫🇷 389 278 11ms 5 Aug 2022 818th Starwort 🇬🇧 389 278 11ms 11 Nov 2022 818th PotatoSaladOverlord 389 278 11ms 21 May 2025 822nd dokutan 389 449 272ms 3 Feb 2026 823rd skps2010 388 279 17ms 19 Jun 2019 823rd madex 🇩🇪 388 279 12ms 7 Mar 2024 825th snoozingnewt 🇨🇦 387 403 103ms 22 Oct 2023 826th Natanaelel 🇸🇪 386 502 4ms 23 May 2025 827th KatieLG 🇬🇧 386 519 146ms 15 Oct 2022 828th KatieLG 🇬🇧 386 562 170ms 23 Mar 2024 829th dranjohn 385 281 10ms 24 Sep 2023 829th yokasuretsu 385 281 10ms 11 Jul 2025 831st 5pyr 385 381 2ms 16 May 2023 832nd HerLovelyTentacles 384 282 11ms 8 Feb 2021 832nd jameslindesay 384 282 10ms 25 Feb 2021 832nd myleopard 384 282 12ms 13 Oct 2021 835th squadb3 384 335 13ms 10 Oct 2019 836th cros107 🇦🇺 382 283 10ms 26 Sep 2024 837th dokutan 381 321 4ms 12 Feb 2025 838th dokutan 381 338 11ms 4 Aug 2024 839th n1LS 380 199 41ms 26 Sep 2019 840th BraedenMooreDev 380 285 16ms 29 Oct 2023 840th wh3n3v3r 🇨🇿 380 285 11ms 8 Nov 2024 840th KadinSchultz 380 285 10ms 13 hours ago 843rd KatieLG 🇬🇧 380 710 1,611ms 13 Jan 2025 844th BrettMerri 379 340 13ms 2 Dec 2021 845th MeWhenI 🇻🇦 379 646 1,440ms 11 May 2021 846th sciencejiho 378 286 10ms 26 Apr 2024 846th RedzGoose 🇦🇺 378 286 11ms 23 Oct 2024 848th shaunjc 378 390 5ms 15 Aug 2022 849th dokutan 378 474 1,021ms 4 Feb 2025 850th n1LS 377 287 14ms 25 Sep 2019 851st hellwue 376 288 12ms 14 Feb 2023 852nd MeWhenI 🇻🇦 375 937 71ms 8 Jul 2021 853rd DrPrettyman 374 289 16ms 24 Jul 2023 854th KatieLG 🇬🇧 374 479 1,020ms 17 Mar 2024 855th KatieLG 🇬🇧 373 468 232ms 10 Oct 2021 856th Kloppermand 🇩🇰 372 291 13ms 1 Dec 2021 856th abba23 372 291 11ms 26 May 2022 858th cmayer777 372 577 76ms 14 Oct 2022 859th olivermrose 🇺🇸 371 204 41ms 12 Oct 2021 860th KatieLG 🇬🇧 371 519 91ms 25 Apr 2022 861st nephila-nacrea 🇬🇧 370 280 3ms 28 Jun 2019 862nd epic-programmer-guy 370 292 10ms 31 Dec 2023 863rd tadd 369 205 37ms 16 Apr 2020 864th wenbang24 369 293 10ms 29 Apr 2024 864th cingulataluke 369 293 16ms 3 Jun 2024 864th jtaxen 369 293 10ms 31 Oct 2024 867th vprab 368 294 12ms 10 Dec 2020 868th CheeseCake628 🇳🇴 367 276 546ms 18 Oct 2025 869th Agazoth 367 284 268ms 8 Jun 2020 870th amishtal 365 296 10ms 2 Dec 2019 870th jhpaques 🇫🇷 365 296 24ms 2 Aug 2022 870th Mikey-Beep 🇬🇧 365 296 12ms 28 Aug 2023 870th jameswmccarty 365 296 11ms 14 Feb 2026 874th cbrt-x 365 488 695ms 4 Sep 2021 875th heypwesto 🇳🇿 363 285 3ms 18 Apr 2021 876th pandapawskat 363 339 2ms 4 Oct 2021 877th KatieLG 🇬🇧 362 209 37ms 3 May 2021 878th starfihs 362 299 10ms 18 Aug 2024 878th CaedenHarper 🇨🇦 362 299 10ms 29 Jul 2025 880th oriphi 361 300 11ms 17 Jun 2019 First Prev 801–880 of 1,132 Next Last
