{"id":237,"date":"2022-09-25T05:22:47","date_gmt":"2022-09-25T05:22:47","guid":{"rendered":"https:\/\/gammonrants.org\/?page_id=237"},"modified":"2022-10-12T15:08:32","modified_gmt":"2022-10-12T15:08:32","slug":"the-most-unclear-cube-action","status":"publish","type":"page","link":"https:\/\/gammonrants.org\/index.php\/the-most-unclear-cube-action\/","title":{"rendered":"The most unclear cube action?"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"719\" src=\"https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-1024x719.jpg\" alt=\"\" class=\"wp-image-238\" srcset=\"https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-1024x719.jpg 1024w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-300x211.jpg 300w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-768x539.jpg 768w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-1536x1078.jpg 1536w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-2048x1437.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Blue to move. Cube action? Double? Take?<\/figcaption><\/figure>\n\n\n\n<p>This position has an interesting story &#8211; I&#8217;ve played this match as part of my attempt to find out how strong the really strong bots (XG Mobile, True Backgammon\/BGBlitz, Backgammon NJ) really are. I do this by feeding a good number of matches into the three top PC bots (XG2, BGBlitz, Gnu BG) and looking at their analysis at their deepest level.<\/p>\n\n\n\n<p>On this one they totally disagree. Which also means that this is the one position where I won&#8217;t offer a solution to you \ud83d\ude42<\/p>\n\n\n\n<p>All agree on one thing: Blue has a strong lead, with 81% winning chances for blue but low 3% gammon chances. But this is a 2-away, 4-away situation. If blue doubles, white will immediately re-double and cube ownership will have no value for blue. Should blue still double?<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>BGNJ didn&#8217;t double<\/li><li>For XG2 (Roller++) this is a clear double and a close pass. Not doubling would be a 0.141 blunder. Taking would be a 0.014 minor error.<\/li><li>For BGBlitz (5ply) this is almost no double, and a clear take. Not doubling would be a 0.006 mistake, ie. not a mistake at all. Passing would be a big 0.143 blunder.<\/li><li>Gnu Backgammon (4ply) finds itself between these extremes: Double\/Take, not doubling is a -0.049 error, passing is a 0.018 error.<\/li><\/ul>\n\n\n\n<p>XG2&#8217;s rollout interestingly made it less of a blunder to not double (-0.105), but a clearer pass &#8211; taking now would be a 0.034 error.<\/p>\n\n\n\n<p>So, I leave you with these figures. Being a novice compared to the bots I won&#8217;t try to decide what&#8217;s right. <\/p>\n\n\n\n<p>Oh, btw., one move later we arrive at this position:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"676\" src=\"https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-2-1024x676.jpg\" alt=\"\" class=\"wp-image-248\" srcset=\"https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-2-1024x676.jpg 1024w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-2-300x198.jpg 300w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-2-768x507.jpg 768w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-2-1536x1014.jpg 1536w, https:\/\/gammonrants.org\/wp-content\/uploads\/2022\/09\/the_big_cube_decision-2-2048x1353.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>&#8230; in which the bots disagree just as much: XG2 says it is a 0.188 big blunder not to double, while BGBlitz says this is borderline double\/no double (-0.004 error not to double).<\/p>\n\n\n\n<p>And one move later, BGNJ rolled 55, could bring its checkers from 13 to its prime, doubled and I passed (to which XG2 and BGBlitz finally agreed, and this time gnu disagreed, considering it too good to double \ud83d\ude42 )<\/p>\n\n\n\n<p> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>This position has an interesting story &#8211; I&#8217;ve played this match as part of my attempt to find out how strong the really strong bots (XG Mobile, True Backgammon\/BGBlitz, Backgammon NJ) really are. I do this by feeding a good number of matches into the three top PC bots (XG2, BGBlitz, Gnu BG) and looking [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-237","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/pages\/237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/comments?post=237"}],"version-history":[{"count":4,"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/pages\/237\/revisions"}],"predecessor-version":[{"id":250,"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/pages\/237\/revisions\/250"}],"wp:attachment":[{"href":"https:\/\/gammonrants.org\/index.php\/wp-json\/wp\/v2\/media?parent=237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}