{"id":34660,"date":"2025-12-10T00:00:20","date_gmt":"2025-12-10T08:00:20","guid":{"rendered":"https:\/\/www.gmpuzzles.com\/blog\/?p=34660"},"modified":"2025-12-12T06:36:45","modified_gmt":"2025-12-12T14:36:45","slug":"battenburg-sudoku-by-clover","status":"publish","type":"post","link":"https:\/\/www.gmpuzzles.com\/blog\/2025\/12\/battenburg-sudoku-by-clover\/","title":{"rendered":"Battenburg Sudoku by clover!"},"content":{"rendered":"<p>(This post is part of the <a href=\"https:\/\/www.gmpuzzles.com\/blog\/tag\/gas\/\">Genuinely Approachable Sudoku (GAS)<\/a> series.)<br \/>\n<em>Today&#8217;s GAS features the full Battenburg dessert: the checkerboard clues show where an alternating even\/odd pattern must appear and the absence of such clues indicates there is no such &#8220;pretty&#8221; pattern in that space.<\/em><\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2025\/251210-BattenburgSudoku-AccentuateTheNegative.png\" alt=\"Battenburg Sudoku by clover!\" \/><\/p>\n<p align=\"center\"><a href=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2025\/251210-BattenburgSudoku-AccentuateTheNegative.pdf\">PDF<\/a><\/p>\n<p>or <a href=\"https:\/\/sudokupad.app\/ql1jxshkdv\">solve online<\/a> (using SudokuPad)<\/p>\n<p><b>Theme:<\/b> Accentuate the Negative<\/p>\n<p><b>Author\/Opus:<\/b> This is the 84th puzzle from Clover, part of the Genuinely Approachable Sudoku (<a href=\"https:\/\/sudokutheory.com\/gas\/\">GAS<\/a>) team.<\/p>\n<p><b>Rules:<\/b> Standard Sudoku rules (insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region). Whenever a checkerboard clue appears at the intersection of four cells, the numbers in those cells must form a \u201ccheckerboard\u201d pattern of odd and even (i.e., one diagonally opposite pair is odd and the other pair is even). All possible checkerboard clues have been given, so any sets of four cells without a clue cannot have a \u201ccheckerboard\u201d pattern of odd and even.<\/p>\n<p><b>GAS Time Standards (highlight to view):<\/b> Two party hats (\ud83c\udfa9\ud83e\udd73): <span style=\"color: white;background-color: white\">8:00<\/span>; One party hat (\ud83e\udd73): <span style=\"color: white;background-color: white\">15:00<\/span>. All other solvers earn a \ud83e\udd95: <span style=\"color: white;background-color: white\"><span data-sheets-root=\"1\">negative Neovenator<\/span><\/span>.<\/p>\n<p><b>Thomas Hits the GAS (highlight to view): <\/b> <span style=\"color: white;background-color: white\">2:54<\/span>, with <a href=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2025\/sudokupad-clover-December_10_2025_Accentuate_th-a801-d175.replay\">SudokuPad replay file<\/a> shared as a download for now (requires loading via settings menu with improvements expected before people should use this regularly).<\/p>\n<p><b>Solution:<\/b> <a href=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2025\/251210-BattenburgSudoku-AccentuateTheNegative-soln.pdf\">PDF<\/a> and <a href=\"https:\/\/youtu.be\/7t3cuZOCavQ\">solving video<\/a> with explanation from GAS team.<\/p>\n<p><b>Note:<\/b> Follow this link for other less common variations of <a href=\"https:\/\/www.gmpuzzles.com\/blog\/tag\/sudoku-3+variation-2\/\">Sudoku<\/a>.<\/p>\n<p><b>Note 2:<\/b>\u00a0Comments on the blog are great! For a more interactive discussion, please also consider using our\u00a0<a href=\"https:\/\/discord.com\/channels\/1059513302847336469\/1380897111599616020\">Daily GAS discussion<\/a>\u00a0post\u00a0on the GMPuzzles Discord. Not a member of the Discord? Click\u00a0<a href=\"https:\/\/discord.gg\/RNNfEBEbQS\">this link<\/a>\u00a0for basic access.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>(This post is part of the Genuinely Approachable Sudoku (GAS) series.) Today&#8217;s GAS features the full Battenburg dessert: the checkerboard clues show where an alternating even\/odd pattern must appear and the absence of such clues indicates there is no such &#8220;pretty&#8221; pattern in that space. PDF or solve online (using SudokuPad) Theme: Accentuate the Negative [&hellip;]<\/p>\n","protected":false},"author":444,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,126],"tags":[8,15,56,237],"class_list":["post-34660","post","type-post","status-publish","format-standard","hentry","category-puzzle","category-othersudoku","tag-sudoku-3","tag-wednesdaythursday","tag-variation-2","tag-gas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Battenburg Sudoku by clover! - The Art of Puzzles<\/title>\n<meta name=\"description\" content=\"Today&#039;s GAS shows the full Battenburg dessert: the checkerboard clues show where an even\/odd pattern appears; the absence of clues does not.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gmpuzzles.com\/blog\/2025\/12\/battenburg-sudoku-by-clover\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Battenburg Sudoku by clover! - The Art of Puzzles\" \/>\n<meta property=\"og:description\" content=\"Today&#039;s GAS shows the full Battenburg dessert: the checkerboard clues show where an even\/odd pattern appears; the absence of clues does not.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.gmpuzzles.com\/blog\/2025\/12\/battenburg-sudoku-by-clover\/\" \/>\n<meta property=\"og:site_name\" content=\"The Art of Puzzles\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-10T08:00:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-12T14:36:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2025\/251210-BattenburgSudoku-AccentuateTheNegative.png\" \/>\n<meta name=\"author\" content=\"Clover\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@drsudoku\" \/>\n<meta name=\"twitter:site\" content=\"@drsudoku\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Clover\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2025\\\/12\\\/battenburg-sudoku-by-clover\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2025\\\/12\\\/battenburg-sudoku-by-clover\\\/\"},\"author\":{\"name\":\"Clover\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/#\\\/schema\\\/person\\\/18e8374ccaf31b1bfa1dc36c28c5c56d\"},\"headline\":\"Battenburg Sudoku by clover!\",\"datePublished\":\"2025-12-10T08:00:20+00:00\",\"dateModified\":\"2025-12-12T14:36:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2025\\\/12\\\/battenburg-sudoku-by-clover\\\/\"},\"wordCount\":273,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2025\\\/12\\\/battenburg-sudoku-by-clover\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.gmpuzzles.com\\\/images\\\/puzzles2025\\\/251210-BattenburgSudoku-AccentuateTheNegative.png\",\"keywords\":[\"sudoku\",\"wed\\\/thurs\",\"variation\",\"gas\"],\"articleSection\":[\"Puzzle\",\"Other Sudoku\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2025\\\/12\\\/battenburg-sudoku-by-clover\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2025\\\/12\\\/battenburg-sudoku-by-clover\\\/\",\"url\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2025\\\/12\\\/battenburg-sudoku-by-clover\\\/\",\"name\":\"Battenburg Sudoku by clover! 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