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 481st HassanAliKadhem 🇧🇭 299 187 10ms 14 Jan 2022 481st trist224 🇫🇷 299 187 13ms 27 Sep 2022 481st Zach10za 299 187 10ms 2 Dec 2022 484th ADV1K 🇮🇳 298 188 11ms 25 Oct 2021 484th Bananapants22 298 188 10ms 27 Aug 2022 484th zyc-2024 🇨🇳 298 188 10ms 12 days ago 487th MarshalX 🇵🇱 296 189 10ms 14 Nov 2024 488th ShootingStar91 295 190 11ms 28 May 2019 488th kenballus 295 190 10ms 17 Aug 2022 488th Ayush-Agarwal07 295 190 10ms 5 Sep 2023 488th erikgaal 295 190 9ms 13 Oct 2023 488th pricemat 295 190 10ms 26 Oct 2023 488th CyberTapir 295 190 10ms 27 Aug 2024 488th mm1013g 295 190 10ms 6 Sep 2024 488th ComputerKWasTaken 🇺🇸 295 190 10ms 8 May 2025 488th EthanJantz 295 190 17ms 5 Sep 2025 488th JOrE20 295 190 10ms 15 Feb 2026 498th MLPdiscord 293 191 10ms 22 Jan 2022 498th jusaka 293 191 11ms 8 days ago 500th WilliamBate 290 193 10ms 18 Aug 2020 500th evanrittner 290 193 10ms 26 Feb 2021 500th ztuned 290 193 10ms 26 Jul 2023 500th te-chnical 290 193 10ms 6 May 2025 504th Demonarchet 286 196 12ms 18 Apr 2023 504th Chimplement 286 196 13ms 13 Dec 2023 506th og2701 284 197 10ms 14 May 2021 506th ethandhunt 284 197 9ms 16 Aug 2021 508th Akilles1 281 199 11ms 20 Nov 2024 509th jakekaplan 280 200 15ms 15 Mar 2019 510th CRHillman 279 201 11ms 15 Sep 2020 511th akshatj27 🇦🇶 277 202 11ms 11 Jan 2022 512th CheeseCake628 🇳🇴 275 204 17ms 15 Nov 2024 513th mrmena 🇦🇺 273 205 10ms 29 Jun 2021 514th besasam 265 211 10ms 31 Mar 2021 515th PaulBadour 264 212 10ms 29 Oct 2023 516th zuparnowa 263 213 10ms 28 Jan 2019 516th henrytranter 263 213 11ms 20 Sep 2019 516th KiwiLT 263 213 9ms 16 Nov 2022 519th Bit125 262 214 11ms 31 Jan 2024 520th XaXa1234 260 215 11ms 23 Apr 2020 520th JuniorKlump 260 215 10ms 15 Sep 2025 522nd hotmanga 256 219 10ms 6 Nov 2023 523rd atazzam 🇺🇸 253 221 11ms 3 Sep 2022 524th jamespeilunli 252 222 9ms 29 Dec 2021 525th vonKrafft 251 223 9ms 25 Mar 2020 526th tasuren 250 224 16ms 8 Jan 2021 527th elteammate 248 226 10ms 7 Jul 2020 528th thomashastings 247 227 12ms 15 Apr 2021 529th Florian-Mt 241 232 9ms 15 Mar 2024 530th Ccuredalerayner 240 233 10ms 14 May 2021 531st AforAmpere 238 235 11ms 3 May 2020 532nd tkjn 234 239 10ms 8 Nov 2023 532nd OSYCh314 🇦🇺 234 239 10ms 7 Nov 2024 534th egelmex 230 243 10ms 15 Nov 2019 534th NoneTheFewer 230 243 10ms 27 Dec 2025 536th hjcafaroUC 228 246 10ms 12 Jun 2021 537th TJK-S 227 247 10ms 3 Dec 2025 538th craftablescience 221 253 10ms 25 Apr 2022 539th DihydrogenMonoxideH2O 220 255 11ms 23 Jan 2025 540th newc0m 209 268 10ms 8 Apr 2019 541st SURAJMITTAL 207 270 10ms 17 Dec 2024 542nd luttermann 206 272 9ms 9 Aug 2019 543rd kevinnaviapaiva 204 274 12ms 14 Feb 2025 544th twocatsinatrenchcoat 201 278 10ms 12 May 2022 545th justpic1 201 279 11ms 13 Mar 2023 545th Mch47 201 279 13ms 29 Oct 2023 547th dcure73 200 280 9ms 7 Jun 2019 548th ineedcookie 199 281 9ms 1 May 2024 549th YoungjuneKwon 197 284 10ms 22 Jan 2019 550th JKfromHMS 194 288 10ms 30 Apr 2024 551st r-benson 🇬🇧 192 291 11ms 30 Jan 2023 552nd kpasc 190 294 9ms 14 Jul 2018 553rd MatanAvitan 190 295 11ms 18 Feb 2020 553rd StoverGitHub 190 295 10ms 16 Jun 2022 553rd cseiter 190 295 10ms 6 Dec 2022 556th UltimateGuy0987 184 305 11ms 8 Nov 2022 556th shanerey6 184 305 11ms 4 Oct 2023 558th mothcolada 🇺🇸 173 324 10ms 15 Dec 2020 559th jjbvtk 172 325 9ms 27 Sep 2021 560th jgermain48 172 326 11ms 25 Apr 2020 First Prev 481–560 of 597 Next Last
