{"id":398,"date":"2013-01-21T07:00:42","date_gmt":"2013-01-21T15:00:42","guid":{"rendered":"http:\/\/www.gmpuzzles.com\/blog\/?page_id=398"},"modified":"2018-08-25T14:31:24","modified_gmt":"2018-08-25T21:31:24","slug":"cave-rules-and-info","status":"publish","type":"page","link":"https:\/\/www.gmpuzzles.com\/blog\/cave-rules-and-info\/","title":{"rendered":"Cave Rules and Info"},"content":{"rendered":"

\"Example<\/p>\n

Rules:<\/b> Shade some cells to leave behind a single connected group — the cave — with no enclosed, shaded cells. In other words, all shaded cells must be connected by other shaded cells to an edge of the grid. All numbered cells must be a part of the cave, with each number indicating the total count of cells connected vertically and horizontally to the numbered cell including the cell itself<\/i>.<\/p>\n

Answer String:<\/b> Enter the length in cells of each of the cave segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma. This example has the key “5,221,322,311”.<\/p>\n

(Brief) History of Cave:<\/b> This style was first published under the name “BAG” in 1996 by Nikoli; the original author was \u30b2\u30b5\u30af\u3067\u3059\u3088 (Gesaku Desu Yo – “It’s Comedy!”). It borrows many rules from another Nikoli style, Kuromasu (Where Is Black Cells?), which first appeared in 1991. The original presentation of BAG involved drawing a single non-intersecting loop, and this style persisted when the puzzle first came to the West under the new name “Corral” for the 2002 US\/Canadian Qualifying Test for the World Puzzle Championship. A different presentation and set of rules has evolved over time involving shading cells instead of forming a loop; this presentation has gone by the name “Cave” at the World Puzzle Championship, and is the format and name used here at Grandmaster Puzzles. <\/p>\n

History of this example:<\/b> This Cave was written by Thomas Snyder for his “Better Know the USPC series<\/a>” with solving tips that are highly recommended for the style.<\/p>\n

Sources for Cave Puzzles:<\/b> Follow this link for classic Cave puzzles<\/a> on this website and this link for variations on Cave puzzles<\/a>. If you are new to this puzzle type, here are our easiest Cave Puzzles<\/a> to get started on. More Cave puzzles can be found in Roger Barkan’s Colossal Cave Collection<\/i><\/a>, in The Art of Puzzles<\/i><\/a>, and in our beginner-friendly collection Intro to GMPuzzles<\/i><\/a> by Serkan Y\u00fcrekli.<\/p>\n

Design rules for contributors:<\/b> A Grandmaster Cave will have a unique solution that can be reached by logic alone. Generally, a Grandmaster Cave should have symmetry or a theme that is interesting enough to not require symmetry.<\/p>\n","protected":false},"excerpt":{"rendered":"

Rules: Shade some cells to leave behind a single connected group — the cave — with no enclosed, shaded cells. In other words, all shaded cells must be connected by other shaded cells to an edge of the grid. 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