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?
Rijndael S-box in Python in bytes. 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 Bytes Time Submitted 1st btnlq 1,000 127 603ms 1 Sep 2023 2nd JayXon 🇺🇸 984 129 18ms 27 days ago 3rd ovs-code 🇩🇪 927 137 35ms 17 Mar 2025 4th AlephSquirrel 914 139 29ms 4 Feb 2024 5th xnor-gate 907 140 377ms 9 Sep 2023 5th blaztoma 🇱🇹 907 140 24ms 9 days ago 7th pardouin 🇫🇷 901 141 13ms 28 Jun 2024 7th edsrzf 🇳🇿 901 141 10ms 9 Dec 2025 9th nwellnhof 🇩🇪 894 142 33ms 15 Nov 2023 9th Steffan153 🇫🇮 894 142 14ms 10 Jun 2024 9th bizy-coder 894 142 18ms 29 Oct 2024 9th Emutis 🇱🇹 894 142 23ms 5 days ago 13th lifthrasiir 🇰🇷 882 144 16ms 20 Nov 2024 13th sean-niemann 🇺🇸 882 144 14ms 5 Feb 2025 15th canissimia 🇦🇶 876 145 97ms 9 Sep 2023 16th kg583 🇺🇸 870 146 27ms 20 Feb 2024 17th hallvabo 🇳🇴 858 148 18ms 12 Sep 2023 17th 5cw 🇺🇸 858 148 456ms 17 Jul 2025 19th Seek64 🇩🇪 847 150 20ms 12 days ago 20th GrayJoKing 🇦🇺 841 151 19ms 15 Nov 2023 21st sisyphus-ppcg 🇦🇺 836 152 40ms 10 days ago 22nd SirBogman 🇺🇸 830 153 17ms 21 Sep 2023 23rd MeWhenI 🇻🇦 825 154 38ms 1 Sep 2023 23rd CornerMercury 🇬🇧 825 154 10ms 26 Feb 2026 25th snoozingnewt 🇨🇦 814 156 20ms 20 Feb 2026 25th Flekay 🇩🇪 814 156 20ms 12 days ago 25th aksyristos 814 156 23ms 6 hours ago 28th inventshah 804 158 15ms 3 Sep 2023 29th bricknellj 799 159 149ms 23 Apr 2025 30th anter69 🇭🇺 794 160 10ms 19 Nov 2023 30th ryyyn 🇺🇸 794 160 23ms 10 Dec 2025 32nd GolfingSuccess 🇬🇷 779 163 22ms 1 Sep 2023 33rd neel11235813 756 168 13ms 29 Nov 2023 34th davitf 751 169 31ms 30 Apr 2024 35th ndren 747 170 17ms 9 Oct 2025 35th Lv0Sys 🇵🇱 747 170 11ms 24 Feb 2026 37th jared-hughes 730 174 9ms 5 Sep 2023 38th StefanHabel 🇨🇦 722 176 10ms 19 days ago 39th guilhem-roy 🇫🇷 694 183 10ms 10 Jul 2024 40th m-tkach 🇺🇦 683 186 23ms 10 Nov 2023 41st stefangimmillaro 679 187 2,829ms 9 Sep 2023 41st FortuiteMan 🇫🇷 679 187 10ms 27 Nov 2025 43rd Languag3 668 190 11ms 22 Jan 2026 44th CaedenHarper 🇨🇦 658 193 148ms 14 Aug 2025 45th InigoK 🇺🇸 629 202 156ms 10 Sep 2025 46th klixel 🇨🇦 623 204 3,442ms 20 Jul 2025 46th emgordon154 623 204 41ms 22 Sep 2025 48th duckyluuk 🇳🇱 611 208 3,108ms 30 Jul 2025 49th weliveinhell 🇭🇹 605 210 10ms 13 Oct 2023 49th andrewjc2000 605 210 99ms 14 Aug 2025 51st albanian-laundromat 593 214 152ms 6 May 2025 52nd janbehrens 🇩🇪 585 217 9ms 2 Jan 2024 52nd BREMAUCY 🇫🇷 585 217 118ms 24 Aug 2025 54th DialFrost 🇸🇬 580 219 114ms 11 Oct 2024 55th annaproxy 577 220 111ms 4 Oct 2023 55th dokutan 577 220 10ms 9 Sep 2025 57th OllieBoyne 🇬🇧 575 221 10ms 6 Jun 2024 58th commandz0 🇺🇸 570 223 40ms 23 Mar 2025 59th KatieLG 🇬🇧 567 224 114ms 26 Feb 2024 60th plcc0 562 226 54ms 13 Jan 2026 61st mathisfun271 559 227 10ms 16 Feb 2024 62nd scpchicken 🇵🇼 557 228 114ms 2 Nov 2023 63rd cros107 🇦🇺 555 229 10ms 11 Nov 2025 64th wh3n3v3r 🇨🇿 552 230 117ms 18 Nov 2024 64th firegene 🇮🇪 552 230 25ms 9 Feb 2026 66th ahmetdemirag 🇨🇾 536 237 112ms 19 Feb 2025 66th luuumine 🇫🇷 536 237 18ms 21 Nov 2025 68th qpwoeirut 531 239 45ms 19 Sep 2025 69th m42km 529 240 51ms 4 Feb 2024 69th SB-945 529 240 51ms 10 Sep 2025 71st adamnielson42 🇺🇸 525 242 10ms 20 Dec 2023 71st madex 🇩🇪 525 242 10ms 2 Jul 2024 71st Mabeloid 🇳🇴 525 242 11ms 17 Sep 2024 71st Babafaba 525 242 25ms 30 Oct 2025 75th juliusgeo 523 243 20ms 17 Sep 2023 76th TheZwierzLF 🇵🇱 520 244 10ms 7 Dec 2025 77th yzhs 🇩🇪 514 247 17ms 24 Mar 2024 78th nstearns96 🇬🇧 512 248 11ms 20 Sep 2023 79th StinkAndShityAura 510 249 11ms 17 Nov 2024 79th vhoulbreque 🇫🇷 510 249 30ms 30 Nov 2025 1–80 of 165 Next Last