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?
Diamonds 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 318th audrey314 431 130 10ms 29 Oct 2023 318th ValentinCassayre 431 130 10ms 27 Jul 2024 323rd MichaelMBradley 🇨🇦 427 131 9ms 3 Apr 2022 323rd moustave 427 131 10ms 3 Dec 2024 325th Shreyas-21 424 132 10ms 17 Feb 2021 325th ImpressedByRocks 424 132 10ms 25 Aug 2022 325th QuincyNash 🇺🇸 424 132 10ms 29 Nov 2022 325th eiburns 424 132 9ms 18 Sep 2023 325th namelessiw 424 132 10ms 5 Mar 2024 330th ehulinsky 🇺🇸 421 133 62ms 10 Nov 2021 330th GodlyProgrammer1 421 133 11ms 27 Nov 2025 332nd rschwa6308 🇺🇸 418 134 10ms 18 Aug 2021 332nd scottwday 🇨🇦 418 134 12ms 4 Dec 2021 332nd Andrey135296 418 134 10ms 25 Nov 2024 335th dyc3 415 135 9ms 8 Aug 2020 335th SniperSmiley 🇺🇸 415 135 11ms 23 Jun 2021 335th bbakersmith 415 135 10ms 15 Jul 2021 335th xDavidL 415 135 9ms 18 Feb 2022 335th codewrite 🇬🇧 415 135 10ms 4 Jul 2025 340th SirFireball3521 412 136 10ms 25 Jan 2023 340th vhoulbreque 🇫🇷 412 136 9ms 30 Nov 2025 342nd bkshrader 409 137 10ms 31 Dec 2018 342nd alangodfrey 409 137 10ms 10 Jun 2019 342nd michelebastione 🇮🇹 409 137 9ms 7 Nov 2019 342nd wrhm 409 137 10ms 12 Dec 2020 342nd abailey2020 🇺🇸 409 137 11ms 13 Dec 2020 342nd asheeri 409 137 11ms 31 Aug 2021 342nd galloj 🇨🇿 409 137 9ms 18 Aug 2022 342nd J09M 409 137 11ms 25 Sep 2025 350th yettinmoor 406 138 9ms 29 Aug 2020 350th Ailko 🇧🇪 406 138 9ms 12 May 2022 350th Azearia 406 138 10ms 18 May 2025 353rd itiievskyi 🇺🇦 403 139 10ms 11 Aug 2020 353rd The3gs 403 139 9ms 13 Oct 2020 353rd sleepyStick 403 139 9ms 7 Dec 2021 353rd lomarbrick 403 139 10ms 19 May 2023 353rd Jaydosu 403 139 10ms 25 Jun 2024 353rd lhulinsky 403 139 11ms 21 Oct 2024 353rd klixel 🇨🇦 403 139 11ms 19 Jun 2025 360th AkashTandon167 400 140 11ms 9 Dec 2020 361st Deepztream 397 141 9ms 2 Sep 2018 361st Mojken 397 141 10ms 2 Sep 2018 361st Starwort 🇬🇧 397 141 10ms 17 Nov 2018 361st KiwiKoder0123 397 141 10ms 8 Jul 2019 361st jtaxen 397 141 10ms 18 Apr 2024 361st inverseLorentz 🇦🇺 397 141 10ms 10 May 2024 367th Pena86 394 142 10ms 26 Dec 2021 367th lemogne 394 142 9ms 3 Jun 2022 369th TobyBoyne 🇬🇧 392 143 10ms 18 Feb 2022 369th ridingqwerty 🇺🇸 392 143 10ms 26 Nov 2025 371st Trunksistor 🇫🇷 389 144 10ms 12 Apr 2022 371st Bodo171 389 144 10ms 29 Nov 2022 373rd achow0 386 145 10ms 23 Oct 2020 373rd richard-oelze 🇩🇪 386 145 10ms 14 Mar 2022 373rd TheZappie 386 145 10ms 30 Mar 2022 373rd kenny14231 386 145 10ms 6 Aug 2022 373rd jorisbertram 386 145 9ms 26 Aug 2022 373rd roguh 🇬🇹 386 145 11ms 11 Jan 2024 373rd Stockoh 🇫🇷 386 145 11ms 1 May 2024 373rd SectorCorruptor 386 145 10ms 14 Aug 2025 381st wilkij1 384 146 10ms 17 Jun 2018 381st rowboat1 384 146 10ms 18 Jun 2022 381st jhpaques 🇫🇷 384 146 9ms 28 Jul 2022 381st Rambso 384 146 10ms 5 Feb 2023 385th therealbobo 381 147 10ms 23 Apr 2020 385th jfallon1997 381 147 10ms 16 Aug 2022 385th sbyrne51 381 147 10ms 5 Oct 2022 385th cthierfelder 🇲🇨 381 147 9ms 12 Nov 2025 389th ionutm82 378 148 10ms 21 Feb 2019 389th Ted-Barrett 🇦🇺 378 148 10ms 2 Oct 2021 389th bogosorter 378 148 11ms 9 Jul 2025 389th RodAlc24 🇪🇸 378 148 10ms 27 days ago 393rd petroselo 376 149 10ms 29 Dec 2021 393rd shibacho 🇯🇵 376 149 10ms 11 Nov 2022 393rd abhinavuppala 376 149 10ms 15 days ago 396th amishtal 373 150 10ms 26 Dec 2019 396th jbjd 373 150 10ms 30 Jun 2024 396th jameswmccarty 373 150 10ms 10 days ago 399th jarekwg 371 151 9ms 9 May 2019 399th Haksell 🇦🇶 371 151 17ms 1 Dec 2019 First Prev 321–400 of 597 Next Last
