{"id":538,"date":"2025-12-17T12:59:15","date_gmt":"2025-12-16T23:59:15","guid":{"rendered":"https:\/\/thesudoku.com\/blog\/?page_id=538"},"modified":"2025-12-22T11:37:15","modified_gmt":"2025-12-21T22:37:15","slug":"sudoku-rules-hard","status":"publish","type":"page","link":"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/","title":{"rendered":"Sudoku Rules Hard"},"content":{"rendered":"\n
\n
\n

Sudoku Rules<\/p>\n\n\n\n

\n
\n

Easy<\/a><\/p>\n<\/div>\n\n\n\n

\n

Normal<\/a><\/p>\n<\/div>\n\n\n\n

\n

Hard<\/a><\/p>\n\n\n\n

\n<\/div>\n\n\n\n

Expert<\/a><\/p>\n\n\n\n

Master<\/a><\/p>\n<\/div>\n\n\n\n

\n\n\n\n
\n
\n
\"Sudoku<\/a><\/figure>\n\n\n\n
\n\n\n\n
\n

X-Wing<\/a><\/p>\n\n\n\n

Spot the 2×2 rectangle that forms the X-Wing pattern<\/p>\n<\/div>\n<\/div>\n\n\n\n

\n
\"Sudoku<\/a><\/figure>\n\n\n\n
\n\n\n\n
\n

XY-Wing<\/p>\n\n\n\n

Sometimes just called “Y-Wing”. Find three cells that form a “Y”-shape<\/p>\n<\/div>\n<\/div>\n\n\n\n

\n
\"Sudoku<\/a><\/figure>\n\n\n\n
\n\n\n\n
\n

Swordfish<\/p>\n\n\n\n

Spot the 3×3 rectangle that forms the Swordfish pattern<\/p>\n<\/div>\n<\/div>\n\n\n\n

\n
\"Sudoku<\/a><\/figure>\n\n\n\n
\n\n\n\n
\n

Jellyfish<\/p>\n\n\n\n

Spot the 4×4 rectangle that forms the Jellyfish pattern<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Sudoku Rules Easy Normal Hard Expert Master X-Wing Spot the 2×2 rectangle that forms the X-Wing pattern XY-Wing Sometimes just called “Y-Wing”. Find three cells that form a “Y”-shape Swordfish Spot the 3×3 rectangle that forms the Swordfish pattern Jellyfish Spot the 4×4 rectangle that forms the Jellyfish pattern<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-no-title","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-538","page","type-page","status-publish","hentry","category-hard-techniques"],"yoast_head":"\nSudoku Rules Hard - TheSudoku.com<\/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:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sudoku Rules Hard - TheSudoku.com\" \/>\n<meta property=\"og:description\" content=\"Sudoku Rules Easy Normal Hard Expert Master X-Wing Spot the 2×2 rectangle that forms the X-Wing pattern XY-Wing Sometimes just called “Y-Wing”. Find three cells that form a “Y”-shape Swordfish Spot the 3×3 rectangle that forms the Swordfish pattern Jellyfish Spot the 4×4 rectangle that forms the Jellyfish pattern\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/\" \/>\n<meta property=\"og:site_name\" content=\"TheSudoku.com\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-21T22:37:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thesudoku.com\/blog\/wp-content\/uploads\/2025\/12\/X-Wing.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/\",\"url\":\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/\",\"name\":\"Sudoku Rules Hard - TheSudoku.com\",\"isPartOf\":{\"@id\":\"https:\/\/thesudoku.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/thesudoku.com\/blog\/wp-content\/uploads\/2025\/12\/X-Wing.png\",\"datePublished\":\"2025-12-16T23:59:15+00:00\",\"dateModified\":\"2025-12-21T22:37:15+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/#breadcrumb\"},\"inLanguage\":\"en-NZ\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-NZ\",\"@id\":\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/#primaryimage\",\"url\":\"https:\/\/thesudoku.com\/blog\/wp-content\/uploads\/2025\/12\/X-Wing.png\",\"contentUrl\":\"https:\/\/thesudoku.com\/blog\/wp-content\/uploads\/2025\/12\/X-Wing.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/thesudoku.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Sudoku Rules Hard\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/thesudoku.com\/blog\/#website\",\"url\":\"https:\/\/thesudoku.com\/blog\/\",\"name\":\"TheSudoku.com\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/thesudoku.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-NZ\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Sudoku Rules Hard - TheSudoku.com","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:\/\/thesudoku.com\/blog\/sudoku-rules-hard\/","og_locale":"en_US","og_type":"article","og_title":"Sudoku Rules Hard - TheSudoku.com","og_description":"Sudoku Rules Easy Normal Hard Expert Master X-Wing Spot the 2×2 rectangle that forms the X-Wing pattern XY-Wing Sometimes just called “Y-Wing”. 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