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 880th b4dpxl 361 300 10ms 9 Nov 2021 880th omri2001 361 300 11ms 22 Oct 2022 880th nemo4598 361 300 10ms 24 Feb 2026 884th fischfood 361 409 5ms 5 Aug 2025 885th GV94 🇸🇪 359 359 12ms 8 Dec 2020 886th luca1339 359 496 543ms 30 Oct 2024 887th dokutan 358 538 716ms 3 Feb 2026 888th berdzi 357 303 11ms 20 Apr 2022 889th goombado 356 304 10ms 23 Oct 2020 890th Msleizak 🇫🇷 356 544 4ms 10 Nov 2023 891st dokutan 356 694 31ms 24 Feb 2026 892nd eshilo-draper 355 305 10ms 13 Sep 2022 892nd Ythaenagor 355 305 10ms 5 Aug 2024 894th vonKrafft 354 306 12ms 25 Mar 2020 894th zt14427 354 306 10ms 28 Feb 2023 894th ridingqwerty 🇺🇸 354 306 13ms 14 Dec 2023 897th andre-lameirinhas 🇵🇹 352 307 10ms 8 Feb 2020 897th Bombergames 352 307 12ms 20 Jan 2022 897th julian-hoelz 352 307 10ms 22 Sep 2024 900th kasarino 352 666 39ms 26 Feb 2026 901st Xwilarg 🇫🇷 352 787 44ms 18 Nov 2021 902nd befoster 351 308 10ms 8 May 2021 902nd Bonjour27891 🇻🇳 351 308 12ms 13 Mar 2022 902nd JOrE20 351 308 10ms 8 Feb 2026 905th Schmitt-Very-Cool 351 552 4ms 22 Nov 2023 906th CaedenHarper 🇨🇦 350 289 741ms 29 Jul 2025 907th ellis-rix 350 309 11ms 28 Oct 2024 908th msbranicky 350 475 2ms 11 Aug 2023 909th aazuspan 348 311 11ms 12 Jun 2022 910th MeWhenI 🇻🇦 348 569 148ms 7 Jul 2021 911th CDWimmer 347 312 10ms 8 May 2020 911th dal548 347 312 10ms 12 Jun 2024 913th KatieLG-Transpiler 🇬🇧 347 674 318ms 25 Sep 2022 914th dokutan 346 676 381ms 4 Feb 2025 915th mathieurodic 345 314 10ms 21 Oct 2025 916th KatieLG 🇬🇧 344 477 3ms 29 Mar 2024 917th firegene 🇮🇪 343 315 11ms 3 days ago 918th Crysp 342 377 12ms 13 Apr 2021 919th dokutan 342 717 1,295ms 10 Dec 2024 920th dijs 341 378 11ms 22 Dec 2019 921st dylanjones92 340 318 10ms 24 Jan 2024 922nd cmayer777 340 549 2ms 14 Oct 2022 923rd MeWhenI 🇻🇦 340 638 274ms 18 Mar 2024 924th MeWhenI 🇻🇦 339 372 8ms 18 Nov 2023 925th alangodfrey 338 320 10ms 18 Jun 2019 926th TheZwierzLF 🇵🇱 337 224 35ms 25 Dec 2025 927th CaedenHarper 🇨🇦 337 344 1,479ms 7 Sep 2025 928th eranws 337 382 11ms 2 Sep 2022 929th aranasaurus 337 571 113ms 12 May 2022 930th KatieLG 🇬🇧 337 638 1,623ms 28 Sep 2024 931st aksyristos 336 322 11ms 10 days ago 932nd oddvalue 336 439 5ms 4 Aug 2023 933rd RedzGoose 🇦🇺 335 302 675ms 10 Sep 2024 934th JGDoerrer 335 648 193ms 1 Feb 2022 935th TravisEz13 334 312 291ms 5 Jun 2020 936th MeWhenI 🇻🇦 333 311 3ms 16 Apr 2023 937th meenie 332 228 39ms 1 Jan 2021 938th evanrittner 331 327 10ms 18 Nov 2019 938th dotcomstar 331 327 18ms 17 Nov 2021 940th KatieLG 🇬🇧 330 504 2ms 9 Sep 2022 941st mazzegi 330 709 366ms 17 Apr 2020 942nd robertovers 327 331 10ms 9 Oct 2023 943rd KatieLG 🇬🇧 327 543 390ms 23 Mar 2024 944th KatieLG 🇬🇧 326 1,183 10ms 25 Apr 2022 945th derekthatcher 325 333 11ms 21 Sep 2020 946th codewrite 🇬🇧 324 590 459ms 7 May 2025 947th GrayJoKing 🇦🇺 324 1,909 2ms 11 Aug 2020 948th bretthat0 323 335 10ms 5 Mar 2022 949th aaronze 🇦🇺 323 399 12ms 27 Apr 2021 950th KatieLG 🇬🇧 323 483 84ms 23 Mar 2024 951st KatieLG 🇬🇧 323 614 128ms 25 Apr 2022 952nd RoscoeSmith 322 336 11ms 22 Nov 2022 953rd martinnorling 🇸🇪 320 338 15ms 4 Feb 2022 954th dokutan 320 481 3,916ms 24 Oct 2024 955th alemelis 319 316 756ms 19 Sep 2024 956th Pena86 319 339 10ms 28 Feb 2021 957th eiburns 316 342 11ms 4 Jan 2022 957th Vaekor 316 342 11ms 3 Aug 2023 959th CatsAreFluffy 315 343 10ms 8 Feb 2023 959th Bulmenisaurus 315 343 11ms 1 Mar 2025 First Prev 881–960 of 1,132 Next Last
