The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
All holes in J 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 Holes Points Chars Submitted 161st vezzick 1 620 50 20 Mar 2021 161st Bonjour27891 🇻🇳 1 620 50 11 Mar 2022 161st aliakseikalosha 1 620 50 22 Apr 2022 164th gnuvince 1 619 42 4 Aug 2024 165th adamnielson42 🇺🇸 2 595 408 12 Dec 2023 166th handisb 1 578 45 24 Sep 2019 167th didion0 🇺🇸 1 565 46 3 May 2022 168th UpwardProcess 1 554 56 29 Jul 2019 169th metakuna 1 550 20 14 Apr 2019 170th TFeld00 🇩🇰 1 541 37 21 May 2019 171st Starwort 🇬🇧 1 531 49 21 Mar 2019 171st villfa 1 531 49 27 May 2019 171st lowlighter 1 531 49 1 Nov 2020 171st rucin93 🇵🇱 1 531 49 13 Nov 2020 171st ozefe 🇹🇷 1 531 49 28 Oct 2021 171st c0d3-4-F00d 🇩🇪 1 531 49 5 Jan 2022 171st michael-pruglo 🇺🇦 1 531 49 6 Jul 2022 171st jatloe 1 531 49 1 Oct 2024 171st LostSyntax21 🇬🇧 1 531 49 24 Nov 2024 180th SniperSmiley 🇺🇸 1 525 59 24 Dec 2022 181st Malgosiek 1 517 29 21 Oct 2018 182nd lyphyser 1 517 60 17 Jun 2023 183rd SchHolmes 1 500 30 21 Oct 2018 184th lukasmoellerch 1 500 62 14 Jul 2019 184th eiburns 1 500 62 6 Sep 2023 186th scanhex 1 487 39 27 Dec 2022 187th InigoK 🇺🇸 2 479 1,078 12 Apr 2023 188th brochmann 🇸🇪 1 477 65 6 Feb 2022 189th h3ra993huskp 🇯🇵 1 470 66 13 Oct 2025 190th louisbosqui 1 463 67 29 Dec 2020 190th kamenitxan 🇨🇿 1 463 67 5 Feb 2021 192nd Secozzi 1 456 68 8 Nov 2020 192nd bwat2 1 456 68 8 Mar 2022 194th ian-h-chamberlain 🇺🇸 1 452 42 29 Dec 2019 195th Mabeloid 🇳🇴 10 436 9,969 20 Sep 2024 196th msbranicky 2 427 968 30 Aug 2023 197th prestosilver 🇺🇸 1 415 532 17 Dec 2025 198th hyvyys 2 413 194 27 Sep 2020 199th kmathis22 1 410 83 8 Sep 2025 200th SephQ 1 407 27 9 Feb 2021 201st jngbsn 1 406 64 14 Mar 2019 201st charliegaming 1 406 64 4 Oct 2023 203rd desecaw13 1 396 48 24 Jan 2025 204th mcjo163 1 392 51 18 Apr 2023 205th elisherer 🇮🇱 2 390 993 19 Apr 2019 206th 0racle 1 388 80 19 Dec 2024 207th zuparnowa 1 383 81 13 Feb 2019 207th henrytranter 1 383 81 20 Sep 2019 207th gitabaz 1 383 81 5 Nov 2024 210th jacobly0 🇺🇸 1 363 609 15 Aug 2023 211th alexjlaberge 1 356 73 27 Jul 2020 212th roguh 🇬🇹 1 339 56 23 Jan 2024 213th olivermrose 🇺🇸 1 329 79 29 Aug 2021 214th jackkav 1 316 98 31 Jan 2019 215th abailey2020 🇺🇸 1 310 100 27 Dec 2020 216th keelimeguy 🇺🇸 1 290 107 23 Oct 2023 217th Waffle3z 7 280 7,070 23 Jul 2021 218th namelessiw 1 258 120 4 Jul 2023 219th SwordF-Official 🇺🇸 1 250 76 6 May 2025 220th 1337-man 3 182 15,066 31 Jan 2022 221st CatsAreFluffy 1 145 380 9 Dec 2023 222nd jaxmattfair 🇺🇸 1 134 410 14 Jan 2023 223rd jmerle 🇳🇱 2 112 4,058 15 Jun 2023 224th jiaminglimjm 🇲🇾 1 105 266 9 Jan 2021 225th xkacer 🇨🇿 1 102 177 22 Nov 2020 226th olleicua 🇺🇸 2 101 4,056 1 Apr 2024 227th jaredcrystal 🇺🇸 1 92 315 29 Oct 2019 228th destofr 1 90 288 13 Oct 2022 229th SpareManiKatti 1 83 351 19 Apr 2022 230th Schmitt-Very-Cool 1 82 219 31 Jul 2023 230th gigaprofisi 🇺🇸 1 82 219 4 Jul 2025 232nd zakariamouhid 1 77 3,046 18 May 2023 233rd zwxzwxzwx21 1 73 400 15 Jan 2024 234th SB-945 1 64 359 21 Sep 2023 235th zt14427 2 63 8,873 27 Dec 2024 236th Msleizak 🇫🇷 1 62 373 4 Nov 2022 237th Adix-null 🇱🇹 1 60 319 6 Jul 2023 238th dillon-duncando 1 59 321 21 Dec 2021 239th vonKrafft 1 59 323 26 Mar 2020 240th acotis 1 50 220 18 Feb 2025 First Prev 161–240 of 260 Next Last