{"id":35958,"date":"2026-06-28T00:00:37","date_gmt":"2026-06-28T07:00:37","guid":{"rendered":"https:\/\/www.gmpuzzles.com\/blog\/?p=35958"},"modified":"2026-06-27T13:57:26","modified_gmt":"2026-06-27T20:57:26","slug":"first-seen-odd-even-sudoku-by-bill-murphy","status":"publish","type":"post","link":"https:\/\/www.gmpuzzles.com\/blog\/2026\/06\/first-seen-odd-even-sudoku-by-bill-murphy\/","title":{"rendered":"First Seen Odd\/Even Sudoku by Bill Murphy"},"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>Can you figure how each of the &#8220;First Seen&#8221; parity clues work in today&#8217;s Genuinely Approachable Sudoku from Bill Murphy?<\/em><\/p>\n<p align='center'><img src='https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/260628-FirstSeenOddEvenSudoku.png' alt='First Seen Odd\/Even Sudoku by Bill Murphy' \/><\/p>\n<p align='center'><a href='https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/260628-FirstSeenOddEvenSudoku.pdf'>PDF<\/a><\/p>\n<p>or <a href='https:\/\/www.gmpuzzles.com\/s\/260628Firs'>solve online<\/a> (using SudokuPad)<\/p>\n<p><b>Author\/Opus:<\/b> This is the 130th puzzle from Bill Murphy, 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). The clues outside the grid reveal the first odd or even value appearing in that direction in the row or column. Any number of values of the opposite parity (even or odd) may appear before the first odd or even number.<\/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\">Advised Adasaurus<\/span>.<\/p>\n<p><b>Thomas Hits the GAS (highlight to view): <\/b> <span style=\"color: white;background-color: white\">3:52<\/span>, with <a href=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/sudokupad-Bill_Murph-First_Seen_Odd_Even_Sudoku-a851-d233.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\/puzzles2026\/260628-FirstSeenOddEvenSudoku-soln.pdf\">PDF<\/a>; solving video with explanation to be added later 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.) Can you figure how each of the &#8220;First Seen&#8221; parity clues work in today&#8217;s Genuinely Approachable Sudoku from Bill Murphy? PDF or solve online (using SudokuPad) Author\/Opus: This is the 130th puzzle from Bill Murphy, part of the Genuinely Approachable Sudoku (GAS) team. Rules: [&hellip;]<\/p>\n","protected":false},"author":443,"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-35958","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 v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>First Seen Odd\/Even Sudoku by Bill Murphy - The Art of Puzzles<\/title>\n<meta name=\"description\" content=\"Can you figure how each of the &quot;First Seen&quot; parity clues work in today&#039;s Genuinely Approachable Sudoku from Bill Murphy?\" \/>\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\/2026\/06\/first-seen-odd-even-sudoku-by-bill-murphy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"First Seen Odd\/Even Sudoku by Bill Murphy - The Art of Puzzles\" \/>\n<meta property=\"og:description\" content=\"Can you figure how each of the &quot;First Seen&quot; parity clues work in today&#039;s Genuinely Approachable Sudoku from Bill Murphy?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.gmpuzzles.com\/blog\/2026\/06\/first-seen-odd-even-sudoku-by-bill-murphy\/\" \/>\n<meta property=\"og:site_name\" content=\"The Art of Puzzles\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-28T07:00:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/260628-FirstSeenOddEvenSudoku.png\" \/>\n<meta name=\"author\" content=\"Bill Murphy\" \/>\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=\"Bill Murphy\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/06\\\/first-seen-odd-even-sudoku-by-bill-murphy\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/06\\\/first-seen-odd-even-sudoku-by-bill-murphy\\\/\"},\"author\":{\"name\":\"Bill Murphy\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/#\\\/schema\\\/person\\\/552de1c88fa03b2180785f81655f8014\"},\"headline\":\"First Seen Odd\\\/Even Sudoku by Bill Murphy\",\"datePublished\":\"2026-06-28T07:00:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/06\\\/first-seen-odd-even-sudoku-by-bill-murphy\\\/\"},\"wordCount\":239,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/06\\\/first-seen-odd-even-sudoku-by-bill-murphy\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.gmpuzzles.com\\\/images\\\/puzzles2026\\\/260628-FirstSeenOddEvenSudoku.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\\\/2026\\\/06\\\/first-seen-odd-even-sudoku-by-bill-murphy\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/06\\\/first-seen-odd-even-sudoku-by-bill-murphy\\\/\",\"url\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/06\\\/first-seen-odd-even-sudoku-by-bill-murphy\\\/\",\"name\":\"First Seen Odd\\\/Even Sudoku by Bill Murphy - 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