{"id":35481,"date":"2026-04-01T11:59:20","date_gmt":"2026-04-01T18:59:20","guid":{"rendered":"https:\/\/www.gmpuzzles.com\/blog\/?p=35481"},"modified":"2026-04-02T06:10:13","modified_gmt":"2026-04-02T13:10:13","slug":"captcha-sudoku-by-philip-newman","status":"publish","type":"post","link":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/","title":{"rendered":"CAPTCHA Sudoku? by Philip Newman"},"content":{"rendered":"<p>(This post is part of the <a href='https:\/\/www.gmpuzzles.com\/blog\/tag\/gas\/'>Genuinely Approachable Sudoku (GAS)<\/a> series.)<\/p>\n<p>As long-time solvers of Genuinely Approachable Sudoku will know, we at GAS, Inc. have a reputation. Of approachable puzzles, bordering on the side of far too generous with givens? Of course. But also a reputation for state-of-the-art security.<\/p>\n<p>Now, more than ever, it is my job as Head of Security to implement cutting-edge artificial intelligence solutions to protect our ever dwendling precious resource: hats. To reassuring our valued solvers that we remain a safe place to hang your hat in these turbulent times, I am proud to invite you to be the first Beta Testers of our new security system. Backed by a powerful LLM trained on the mind of an extinct sauropod, you&#8217;ll find our website is more secure than ever.<\/p>\n<p><a href=https:\/\/sudokutheory.com\/gas\/security\/captcha.html>https:\/\/sudokutheory.com\/gas\/security\/captcha.html<\/a><\/p>\n<p><em>GAS &#8211; We&#8217;re there at the drop of a hat<\/em><\/p>\n<p align='center'><img src='https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/GASd.png' alt='' width=500><\/p>\n","protected":false},"excerpt":{"rendered":"<p>(This post is part of the Genuinely Approachable Sudoku (GAS) series.) As long-time solvers of Genuinely Approachable Sudoku will know, we at GAS, Inc. have a reputation. Of approachable puzzles, bordering on the side of far too generous with givens? Of course. But also a reputation for state-of-the-art security. Now, more than ever, it is [&hellip;]<\/p>\n","protected":false},"author":1,"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-35481","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>CAPTCHA Sudoku? by Philip Newman - The Art of Puzzles<\/title>\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\/04\/captcha-sudoku-by-philip-newman\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CAPTCHA Sudoku? by Philip Newman - The Art of Puzzles\" \/>\n<meta property=\"og:description\" content=\"(This post is part of the Genuinely Approachable Sudoku (GAS) series.) As long-time solvers of Genuinely Approachable Sudoku will know, we at GAS, Inc. have a reputation. Of approachable puzzles, bordering on the side of far too generous with givens? Of course. But also a reputation for state-of-the-art security. Now, more than ever, it is [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/\" \/>\n<meta property=\"og:site_name\" content=\"The Art of Puzzles\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-01T18:59:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-02T13:10:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/GASd.png\" \/>\n<meta name=\"author\" content=\"drsudoku\" \/>\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=\"drsudoku\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/\"},\"author\":{\"name\":\"drsudoku\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/#\\\/schema\\\/person\\\/16f28006b2b31c98ce6d8d1affd60275\"},\"headline\":\"CAPTCHA Sudoku? by Philip Newman\",\"datePublished\":\"2026-04-01T18:59:20+00:00\",\"dateModified\":\"2026-04-02T13:10:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/\"},\"wordCount\":155,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.gmpuzzles.com\\\/images\\\/puzzles2026\\\/GASd.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\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/\",\"url\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/\",\"name\":\"CAPTCHA Sudoku? by Philip Newman - The Art of Puzzles\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.gmpuzzles.com\\\/images\\\/puzzles2026\\\/GASd.png\",\"datePublished\":\"2026-04-01T18:59:20+00:00\",\"dateModified\":\"2026-04-02T13:10:13+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/#\\\/schema\\\/person\\\/16f28006b2b31c98ce6d8d1affd60275\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.gmpuzzles.com\\\/images\\\/puzzles2026\\\/GASd.png\",\"contentUrl\":\"https:\\\/\\\/www.gmpuzzles.com\\\/images\\\/puzzles2026\\\/GASd.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/2026\\\/04\\\/captcha-sudoku-by-philip-newman\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"CAPTCHA Sudoku? by Philip Newman\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/\",\"name\":\"The Art of Puzzles\",\"description\":\"Grandmaster Puzzles\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/#\\\/schema\\\/person\\\/16f28006b2b31c98ce6d8d1affd60275\",\"name\":\"drsudoku\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/drsudoku_avatar_1483074039-96x96.jpg\",\"url\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/drsudoku_avatar_1483074039-96x96.jpg\",\"contentUrl\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/wp-content\\\/uploads\\\/2016\\\/12\\\/drsudoku_avatar_1483074039-96x96.jpg\",\"caption\":\"drsudoku\"},\"description\":\"3 time world sudoku champion, 6 time US puzzle champion, artisan puzzle designer with over a half dozen books and dozens of magazine articles on sudoku and other variations.\",\"sameAs\":[\"https:\\\/\\\/www.gmpuzzles.com\"],\"url\":\"https:\\\/\\\/www.gmpuzzles.com\\\/blog\\\/author\\\/drsudoku\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"CAPTCHA Sudoku? by Philip Newman - The Art of Puzzles","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/","og_locale":"en_US","og_type":"article","og_title":"CAPTCHA Sudoku? by Philip Newman - The Art of Puzzles","og_description":"(This post is part of the Genuinely Approachable Sudoku (GAS) series.) As long-time solvers of Genuinely Approachable Sudoku will know, we at GAS, Inc. have a reputation. Of approachable puzzles, bordering on the side of far too generous with givens? Of course. But also a reputation for state-of-the-art security. Now, more than ever, it is [&hellip;]","og_url":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/","og_site_name":"The Art of Puzzles","article_published_time":"2026-04-01T18:59:20+00:00","article_modified_time":"2026-04-02T13:10:13+00:00","og_image":[{"url":"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/GASd.png","type":"","width":"","height":""}],"author":"drsudoku","twitter_card":"summary_large_image","twitter_creator":"@drsudoku","twitter_site":"@drsudoku","twitter_misc":{"Written by":"drsudoku","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/#article","isPartOf":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/"},"author":{"name":"drsudoku","@id":"https:\/\/www.gmpuzzles.com\/blog\/#\/schema\/person\/16f28006b2b31c98ce6d8d1affd60275"},"headline":"CAPTCHA Sudoku? by Philip Newman","datePublished":"2026-04-01T18:59:20+00:00","dateModified":"2026-04-02T13:10:13+00:00","mainEntityOfPage":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/"},"wordCount":155,"commentCount":0,"image":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/#primaryimage"},"thumbnailUrl":"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/GASd.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\/04\/captcha-sudoku-by-philip-newman\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/","url":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/","name":"CAPTCHA Sudoku? by Philip Newman - The Art of Puzzles","isPartOf":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/#primaryimage"},"image":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/#primaryimage"},"thumbnailUrl":"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/GASd.png","datePublished":"2026-04-01T18:59:20+00:00","dateModified":"2026-04-02T13:10:13+00:00","author":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/#\/schema\/person\/16f28006b2b31c98ce6d8d1affd60275"},"breadcrumb":{"@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/#primaryimage","url":"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/GASd.png","contentUrl":"https:\/\/www.gmpuzzles.com\/images\/puzzles2026\/GASd.png"},{"@type":"BreadcrumbList","@id":"https:\/\/www.gmpuzzles.com\/blog\/2026\/04\/captcha-sudoku-by-philip-newman\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.gmpuzzles.com\/blog\/"},{"@type":"ListItem","position":2,"name":"CAPTCHA Sudoku? by Philip Newman"}]},{"@type":"WebSite","@id":"https:\/\/www.gmpuzzles.com\/blog\/#website","url":"https:\/\/www.gmpuzzles.com\/blog\/","name":"The Art of Puzzles","description":"Grandmaster Puzzles","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.gmpuzzles.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.gmpuzzles.com\/blog\/#\/schema\/person\/16f28006b2b31c98ce6d8d1affd60275","name":"drsudoku","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.gmpuzzles.com\/blog\/wp-content\/uploads\/2016\/12\/drsudoku_avatar_1483074039-96x96.jpg","url":"https:\/\/www.gmpuzzles.com\/blog\/wp-content\/uploads\/2016\/12\/drsudoku_avatar_1483074039-96x96.jpg","contentUrl":"https:\/\/www.gmpuzzles.com\/blog\/wp-content\/uploads\/2016\/12\/drsudoku_avatar_1483074039-96x96.jpg","caption":"drsudoku"},"description":"3 time world sudoku champion, 6 time US puzzle champion, artisan puzzle designer with over a half dozen books and dozens of magazine articles on sudoku and other variations.","sameAs":["https:\/\/www.gmpuzzles.com"],"url":"https:\/\/www.gmpuzzles.com\/blog\/author\/drsudoku\/"}]}},"_links":{"self":[{"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/posts\/35481","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/comments?post=35481"}],"version-history":[{"count":3,"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/posts\/35481\/revisions"}],"predecessor-version":[{"id":35484,"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/posts\/35481\/revisions\/35484"}],"wp:attachment":[{"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/media?parent=35481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/categories?post=35481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gmpuzzles.com\/blog\/wp-json\/wp\/v2\/tags?post=35481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}