The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 29 hours. Why not try and solve them ahead of time?
Number Spiral in all languages 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 161st Lydxn 🇨🇦 850 83 33ms 28 May 2022 161st nwellnhof 🇩🇪 850 83 33ms 5 Oct 2022 163rd Natanaelel 🇸🇪 843 91 1,393ms 24 Aug 2022 164th pardouin 🇫🇷 843 125 2,587ms 25 Nov 2024 165th ovs-code 🇩🇪 842 47 39ms 15 Jun 2024 166th nwellnhof 🇩🇪 842 98 303ms 18 Jun 2024 167th JayXon 🇺🇸 841 153 291ms 13 Apr 2022 168th kg583 🇺🇸 841 164 32ms 23 mins ago 169th JayXon 🇺🇸 840 87 493ms 27 Jun 2024 169th pardouin 🇫🇷 840 87 431ms 1 Jul 2024 171st orthoplex 🇨🇽 838 92 10ms 26 Jan 2022 171st btnlq 838 92 9ms 1 Feb 2022 171st bricknellj 838 92 10ms 10 Feb 2023 171st ZakkkkAttackkkk 🇵🇭 838 92 10ms 1 Oct 2023 171st ovs-code 🇩🇪 838 92 9ms 11 Mar 2024 171st pardouin 🇫🇷 838 92 9ms 12 Mar 2024 171st JayXon 🇺🇸 838 92 10ms 27 Jun 2024 171st duckyluuk 🇳🇱 838 92 10ms 9 Jul 2024 179th SirBogman 🇺🇸 838 105 40ms 3 Jun 2025 180th m-tkach 🇺🇦 836 107 1ms 27 Oct 2022 181st Steffan153 🇫🇮 836 120 10ms 8 Mar 2023 182nd snyderek 🇺🇸 836 133 65ms 1 Dec 2024 183rd kg583 🇺🇸 835 113 4ms 25 Sep 2025 184th 386asm 🇺🇸 835 159 36ms 3 May 2023 185th DialFrost 🇸🇬 830 190 1,518ms 5 Feb 2025 186th lynn 829 93 9ms 27 Jan 2022 186th TFeld00 🇩🇰 829 93 9ms 19 May 2022 186th prplz 🇦🇺 829 93 9ms 25 May 2022 186th Seek64 🇩🇪 829 93 10ms 30 Sep 2023 186th blaztoma 🇱🇹 829 93 9ms 26 days ago 191st snoozingnewt 🇨🇦 828 137 96ms 23 days ago 192nd sean-niemann 🇺🇸 827 134 2ms 13 May 2025 193rd Kacarott 🇦🇺 826 87 67ms 2 Jun 2025 194th Yewzir 🇧🇪 826 167 4ms 8 days ago 195th sisyphus-ppcg 🇦🇺 825 93 1,400ms 26 Jan 2022 196th primo-ppcg 🇹🇭 825 102 2ms 27 Jan 2022 197th Steffan153 🇫🇮 825 120 7ms 101 mins ago 198th sisyphus-ppcg 🇦🇺 822 72 94ms 2 Dec 2025 199th Steffan153 🇫🇮 822 90 5ms 103 mins ago 200th davecame 821 94 9ms 30 Sep 2024 200th GrayJoKing 🇦🇺 821 94 9ms 14 days ago 202nd FlyingPenguin223 821 135 1ms 17 Dec 2024 203rd GrayJoKing 🇦🇺 820 86 35ms 28 Jan 2022 204th xsot 🇸🇬 820 89 2ms 10 Aug 2024 205th Irratix 🇳🇱 820 109 1ms 27 Apr 2022 205th DialFrost 🇸🇬 820 109 1ms 6 Nov 2023 207th edsrzf 🇳🇿 820 157 265ms 26 Feb 2026 208th sean-niemann 🇺🇸 819 142 486ms 24 Sep 2025 209th primo-ppcg 🇹🇭 819 162 37ms 21 Jun 2022 210th primo-ppcg 🇹🇭 818 99 11ms 28 Jan 2022 211th GrayJoKing 🇦🇺 817 138 456ms 4 Mar 2022 212th bstrat 815 37 2ms 12 Oct 2025 212th blaztoma 🇱🇹 815 37 2ms 31 Jan 2026 214th CaedenHarper 🇨🇦 815 93 988ms 6 Oct 2025 215th emgordon154 813 116 4ms 27 Dec 2024 216th ovs-code 🇩🇪 812 90 470ms 11 Mar 2024 217th Natanaelel 🇸🇪 811 87 37ms 26 Jan 2022 218th kg583 🇺🇸 811 122 7ms 20 Mar 2025 219th sisyphus-ppcg 🇦🇺 810 53 141ms 27 Jan 2022 220th rucin93 🇵🇱 810 100 9ms 19 Nov 2023 220th sean-niemann 🇺🇸 810 100 12ms 8 Apr 2025 222nd ovs-code 🇩🇪 809 95 146ms 20 Nov 2024 223rd Natanaelel 🇸🇪 808 49 43ms 3 Sep 2022 224th sean-niemann 🇺🇸 808 126 429ms 22 Apr 2024 225th m-tkach 🇺🇦 808 167 26ms 26 Jan 2022 226th xnor-gate 804 123 114ms 27 Jan 2022 227th ImpressedByRocks 803 96 11ms 8 Jun 2022 228th JayXon 🇺🇸 802 88 34ms 1 Mar 2023 228th pardouin 🇫🇷 802 88 38ms 7 Aug 2025 230th DialFrost 🇸🇬 802 101 13ms 24 Jan 2023 230th Argeento 🇵🇱 802 101 10ms 29 Oct 2023 230th ovs-code 🇩🇪 802 101 9ms 20 Nov 2024 233rd sean-niemann 🇺🇸 800 139 60ms 13 May 2024 234th emgordon154 799 96 1,433ms 19 Nov 2024 235th Steffan153 🇫🇮 799 111 7ms 102 mins ago 236th CaedenHarper 🇨🇦 799 161 293ms 11 Dec 2025 237th CaedenHarper 🇨🇦 798 112 2ms 11 Aug 2025 238th snoozingnewt 🇨🇦 795 97 10ms 1 Mar 2026 239th duckyluuk 🇳🇱 794 92 492ms 9 Jul 2024 240th sisyphus-ppcg 🇦🇺 794 140 67ms 26 Jan 2022 First Prev 161–240 of 1,818 Next Last