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 Python 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 81st TobyBoyne 🇬🇧 547 201 10ms 30 Jun 2019 82nd dymowski 545 202 11ms 12 Jul 2019 82nd PiterAnnema 545 202 10ms 27 Aug 2021 82nd JuhoHeiskanen 545 202 22ms 15 Oct 2022 82nd bizy-coder 545 202 10ms 19 Oct 2024 86th daedals 542 203 10ms 13 Feb 2020 86th knutae 🇳🇴 542 203 12ms 30 Nov 2021 88th abailey2020 🇺🇸 539 204 10ms 12 Dec 2020 88th AGoyet 539 204 17ms 12 Aug 2022 88th StefanHabel 🇨🇦 539 204 21ms 9 days ago 91st ydevor 🇮🇱 537 205 10ms 15 Mar 2021 91st jared-hughes 537 205 11ms 2 Jan 2023 91st GulgDev 537 205 20ms 21 Mar 2023 94th TheAristos 534 206 11ms 8 Nov 2019 94th rsgray 534 206 20ms 12 Jan 2024 96th blaztoma 🇱🇹 531 207 18ms 6 days ago 97th michelebastione 🇮🇹 529 208 21ms 17 Jan 2022 97th Haksell 🇦🇶 529 208 11ms 21 Jan 2024 97th fourth-bit 529 208 17ms 6 Jul 2024 97th ahmetdemirag 🇨🇾 529 208 10ms 16 Oct 2024 97th jatloe 529 208 19ms 23 Oct 2024 102nd scpchicken 🇵🇼 526 209 10ms 26 Feb 2023 103rd petar-donchev 524 210 18ms 3 Sep 2019 103rd PFedak 524 210 10ms 16 Apr 2020 103rd quimey 524 210 10ms 20 Jul 2023 106th okkun-oreo 521 211 10ms 29 Oct 2020 107th tnecio 519 212 20ms 30 Aug 2020 107th jmerle 🇳🇱 519 212 12ms 22 Jan 2022 107th CedricGebistorf 519 212 10ms 16 Mar 2022 107th andrewjc2000 519 212 11ms 3 Mar 2025 111th aksyristos 516 213 17ms 4 hours ago 112th doberan 514 214 10ms 31 Oct 2020 112th olavaga 514 214 11ms 16 Aug 2021 112th HumanoidCPU 514 214 11ms 6 Aug 2024 112th nemoyatpeace 514 214 10ms 29 Jan 2026 116th nullie 509 216 11ms 15 Jun 2022 117th b10011 🇫🇮 507 217 17ms 25 Jun 2020 117th adamnielson42 🇺🇸 507 217 11ms 1 Dec 2023 117th nstearns96 🇬🇧 507 217 12ms 23 Oct 2024 120th TaserTheFox 🇺🇸 505 218 11ms 8 Feb 2023 120th Lv0Sys 🇵🇱 505 218 20ms 3 Dec 2025 122nd tpaxman 🇨🇦 502 219 11ms 9 Dec 2020 123rd amollberg 🇸🇪 500 220 10ms 20 Jan 2024 124th yanjs 498 221 18ms 1 Oct 2021 125th Y0UR-U5ERNAME 495 222 15ms 4 Sep 2021 125th RDShah 495 222 14ms 27 Nov 2021 125th try-except-try-accept 🇹🇭 495 222 20ms 28 Jun 2022 125th croc54 495 222 11ms 16 Jan 2025 129th rollershutter 493 223 11ms 25 Mar 2024 129th davidludwik2370 493 223 10ms 17 Sep 2025 131st cellobix 491 224 10ms 15 Aug 2019 131st domingues 🇵🇹 491 224 10ms 10 Aug 2022 131st vishwathg 491 224 11ms 3 Apr 2023 134th dzhang314 489 225 11ms 14 Aug 2019 135th CheeseCake628 🇳🇴 487 226 54ms 13 Feb 2023 135th celiendonze 🇨🇭 487 226 10ms 5 Jul 2023 137th LostSyntax21 🇬🇧 482 228 20ms 1 Dec 2025 138th za3k 478 230 10ms 12 Oct 2022 139th adoxography 476 231 10ms 10 Mar 2020 139th richard-oelze 🇩🇪 476 231 11ms 7 Feb 2021 139th jacklynnepenick 476 231 11ms 25 Aug 2021 139th stertooy 🇧🇪 476 231 11ms 14 Jun 2024 139th denisfouchard 476 231 17ms 21 Aug 2025 144th Psirving 474 232 11ms 31 Jul 2020 145th bbakersmith 472 233 10ms 28 Jun 2022 145th 40fied4t 472 233 11ms 6 May 2025 147th hoodadam 468 235 18ms 13 Mar 2020 147th bastienvoirin 🇫🇷 468 235 11ms 8 Apr 2020 147th itiievskyi 🇺🇦 468 235 22ms 3 Aug 2020 147th joshmoody24 468 235 19ms 4 Mar 2022 147th markusgraube 468 235 11ms 8 Apr 2024 152nd staufga0 466 236 11ms 30 Jan 2024 153rd henrytranter 462 238 11ms 7 Feb 2020 153rd dahrens 462 238 10ms 14 May 2021 153rd msbranicky 462 238 12ms 5 Jul 2023 156th Yewzir 🇧🇪 458 240 11ms 19 May 2023 157th Trusly 456 241 10ms 27 Feb 2024 158th mossprescott 455 242 13ms 19 Jan 2023 159th xyangst 453 243 12ms 15 Oct 2024 160th wrhm 451 244 11ms 16 Dec 2020 First Prev 81–160 of 322 Next Last
