The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Christmas Trees 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 548th eshilo-draper 653 95 9ms 4 Sep 2022 548th MaxElf999 653 95 9ms 29 Sep 2022 548th dapexyz 653 95 9ms 12 Jan 2023 548th robertovers 653 95 10ms 20 Dec 2023 548th brimstonetrader 653 95 9ms 31 Jan 2024 548th qwjhvbxi 653 95 9ms 9 Feb 2024 548th IoLimmer 653 95 8ms 2 Jul 2024 548th Ythaenagor 653 95 10ms 5 Aug 2024 548th KAKISKA-code 🇫🇮 653 95 9ms 24 May 2025 548th SectorCorruptor 653 95 9ms 10 Feb 2026 571st Marcel-Brouette 646 96 10ms 14 Mar 2019 571st gtdlk20 646 96 9ms 6 Aug 2019 571st Akilles1 646 96 11ms 26 Nov 2019 571st SolidTux 646 96 10ms 6 Jan 2020 571st ArturLukianov 646 96 9ms 17 Dec 2020 571st jrm5399 🇰🇿 646 96 10ms 2 Nov 2021 571st joshmoody24 646 96 11ms 4 Mar 2022 571st ramsay 646 96 9ms 10 Aug 2022 571st DrPrettyman 646 96 9ms 3 Jul 2023 571st CameronGBell 646 96 10ms 23 Jan 2025 571st LordSir101 646 96 10ms 11 Aug 2025 571st Aquateraneal 🇺🇸 646 96 10ms 18 days ago 583rd ly0va 639 97 9ms 6 Jan 2019 583rd omgardner 639 97 9ms 28 Feb 2019 583rd maxumusprime 639 97 9ms 18 Feb 2020 583rd itsbjoern 639 97 9ms 8 Dec 2020 583rd dgambit 639 97 9ms 2 Apr 2021 583rd lukehatcher 🇺🇸 639 97 9ms 29 Aug 2021 583rd danielweper 639 97 9ms 21 Oct 2021 583rd borosilicate 639 97 10ms 6 May 2022 583rd bthalheim 639 97 10ms 3 Sep 2022 583rd CarsonChr 🇺🇸 639 97 9ms 18 Sep 2022 583rd n0es 639 97 10ms 18 Oct 2022 583rd Glinte 639 97 9ms 15 Dec 2023 583rd 123mjb 639 97 10ms 3 Jan 2024 583rd damoose717 639 97 10ms 23 May 2025 597th GiorgioBalestrieri 633 98 9ms 20 Mar 2019 597th jamesbtan 633 98 11ms 25 Mar 2019 597th ian-h-chamberlain 🇺🇸 633 98 10ms 14 Dec 2019 597th Reyzartz 633 98 10ms 19 Sep 2020 597th pvilimas 633 98 10ms 18 Feb 2021 597th mamakram 633 98 9ms 20 Oct 2021 597th katharine67 633 98 11ms 8 Oct 2022 597th PotatoSaladOverlord 633 98 11ms 19 May 2023 597th PedroAS7 633 98 9ms 18 Jun 2024 606th arnavb 626 99 11ms 6 Oct 2018 606th Cortan122 626 99 9ms 26 Feb 2019 606th shraiwi 626 99 12ms 12 Jul 2019 606th Theis24 626 99 10ms 27 Nov 2019 606th confy 626 99 9ms 27 Oct 2020 606th OppositeShark 626 99 10ms 19 Jul 2022 606th willdaspit 626 99 10ms 7 Aug 2023 606th TinyTheBrontosaurus 626 99 10ms 3 Dec 2023 606th roguh 🇬🇹 626 99 10ms 14 Jan 2024 606th ComputerKWasTaken 🇺🇸 626 99 9ms 31 May 2024 606th Ralac07 🇦🇺 626 99 10ms 4 Aug 2025 606th Voltrifrodec 🇸🇰 626 99 9ms 7 Nov 2025 618th fatcat2 620 100 9ms 4 Jan 2020 618th tomh1012 620 100 9ms 29 Oct 2020 618th try-except-try-accept 🇹🇭 620 100 10ms 27 Jun 2022 618th Pimveha 620 100 11ms 12 Jan 2023 618th Shiran-Yuan 620 100 10ms 5 Apr 2023 618th r-i-c-e 620 100 9ms 8 Jul 2023 618th ssbhatt4321 620 100 10ms 14 Oct 2023 618th alexjurkiewicz 🇦🇺 620 100 10ms 7 Nov 2023 618th tperr 620 100 10ms 29 Sep 2024 627th cpt-John 614 101 10ms 25 Jun 2019 627th MarkRdgOx 614 101 10ms 14 Jan 2020 627th YoranDS 614 101 10ms 25 Nov 2021 627th danielolson13 614 101 10ms 7 Aug 2022 627th cingulataluke 614 101 10ms 26 Aug 2023 627th Azearia 614 101 9ms 27 Feb 2024 627th MassimoParisi 614 101 10ms 23 Sep 2024 627th matricronia 614 101 10ms 27 Jan 2026 635th derekthatcher 608 102 9ms 18 Sep 2020 635th Schreipfelerer 608 102 10ms 27 Nov 2023 635th epic-programmer-guy 608 102 9ms 25 Dec 2023 638th estomagordo 🇳🇱 602 103 10ms 2 Feb 2020 638th goombado 602 103 9ms 14 Oct 2020 638th asadullayev 602 103 9ms 5 Mar 2021 First Prev 561–640 of 849 Next Last
