{"id":1571,"date":"2025-12-13T10:32:56","date_gmt":"2025-12-13T09:32:56","guid":{"rendered":"https:\/\/control-advent.com\/?p=1571"},"modified":"2025-12-13T10:32:57","modified_gmt":"2025-12-13T09:32:57","slug":"12-which-workshop-should-the-sleigh-be-taken-to-4","status":"publish","type":"post","link":"https:\/\/control-advent.com\/?p=1571","title":{"rendered":"13 &#8211; Fancy a round of elf chess?"},"content":{"rendered":"\n<p>The elves play different games during the weekends. The main aspect for them is that every rule is followed, the games are fair and everybody is having fun. Today, they agreed to play a round of \u201celf chess\u201d where one steps\/jumps on a tile on the giant chess board and then, one every five minutes, follows the instructions written on the tile. The fun is not only to play but also to cheer and applaud from the side!<\/p>\n\n\n\n<p>Due to an exhausting work week, elf Paula has slept in a bit and arrives 20 minutes late, meaning that she has missed four steps \/ tile changes \/ instructions already having been played.<\/p>\n\n\n\n<p>Her best friend Paul is playing and already made it to tile C2 and -although having had a cup of punch- is annoyed and disappointed as she is late and has missed his grant game so far.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"651\" src=\"https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-1024x651.png\" alt=\"\" class=\"wp-image-1572\" srcset=\"https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-1024x651.png 1024w, https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-300x191.png 300w, https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-768x488.png 768w, https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-1536x976.png 1536w, https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-24x15.png 24w, https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-36x23.png 36w, https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3-48x31.png 48w, https:\/\/control-advent.com\/wp-content\/uploads\/2025\/12\/image-3.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Paula is trying to cover up her mishap but to convince Paul she needs to tell him where he started his game.<\/p>\n\n\n\n<p><strong>Can you help her? Where did Paul start?<\/strong><\/p>\n\n\n\n<p>a.\u265f\ufe0f\ud83c\udf84\ud83d\udd52 A2<br>b.\ud83e\udde9\u2728\u2b06\ufe0f A3<br>c.\ud83c\udf81\ud83d\udd0d\u21aa\ufe0f B1<br>d.\ud83d\udccf\ud83c\udfaf\ud83d\udd04 B2<br>e.\u2b50\ufe0f\ud83e\udded\ud83c\udfb2 B3<br>f.\ud83d\udc63\u23f3\ud83c\udf89 C1<br>g.\ud83c\udfc1\ud83c\udf00\ud83d\udce3 D3<\/p>\n\n\n<div class='bootstrap-yop yop-poll-mc'>\n\t\t\t\t\t\t\t<div class=\"basic-yop-poll-container\" style=\"background-color:#b70004; border:0px; border-style:solid; border-color:#b70004; border-radius:0px; padding:10px 10px;\" data-id=\"50\" data-temp=\"basic\" data-skin=\"minimal\" data-cscheme=\"black\" data-cap=\"0\" data-access=\"wordpress\" data-tid=\"\" data-uid=\"ed975d5fe54fd189b95b5eeb3f743405\" data-pid=\"1571\" data-resdet=\"percentages\" data-show-results-to=\"\" data-show-results-moment=\"never\" data-show-results-only=\"false\" data-show-message=\"true\" data-show-results-as=\"bar\" data-sort-results-by=\"as-defined\" data-sort-results-rule=\"asc\"data-is-ended=\"0\" data-gdpr=\"no\" data-gdpr-sol=\"consent\" data-css=\".basic-yop-poll-container[data-uid] .basic-vote { text-align: center; }\" data-counter=\"0\" data-load-with=\"1\" data-notification-section=\"top\"><div class=\"row\"><div class=\"col-md-12\"><div class=\"basic-inner\"><div class=\"basic-message hide\" style=\"border-left: 10px solid #008000; padding: 0px 10px;\" data-error=\"#ff0000\" data-success=\"#008000\"><p class=\"basic-message-text\" style=\"color:#000000; font-size:14px; font-weight:normal;\"><\/p><\/div><div class=\"basic-overlay hide\"><div class=\"basic-vote-options\"><\/div><div class=\"basic-preloader\"><div class=\"basic-windows8\"><div class=\"basic-wBall basic-wBall_1\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_2\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_3\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_4\"><div class=\"basic-wInnerBall\"><\/div><\/div><div class=\"basic-wBall basic-wBall_5\"><div class=\"basic-wInnerBall\"><\/div><\/div><\/div><\/div><\/div><form class=\"basic-form\"><input type=\"hidden\" name=\"_token\" value=\"170af546c1\" autocomplete=\"off\"><div class=\"basic-elements\"><div class=\"basic-element basic-question basic-question-text-horizontal\" data-id=\"50\" data-uid=\"81e4c889244a26d4049588c2b9b0670b\" data-type=\"question\" data-question-type=\"text\" data-allow-multiple=\"no\" data-min=\"1\" data-max=\"1\" data-display=\"horizontal\" data-colnum=\"\" data-display-others=\"no\" data-others-color=\"\" data-others=\"\"><div role=\"heading\" aria-level=\"5\" class=\"basic-question-title\" style=\"color:#ffffff; font-size:14px; font-weight:normal; text-align:center;\">Choose an option:<\/div><ul class=\"basic-answers basic-h-answers\"><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"460\" data-type=\"text\" data-vn=\"0\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[460]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[460]\" name=\"answer[50]\" value=\"460\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">a<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"461\" data-type=\"text\" data-vn=\"1\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[461]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[461]\" name=\"answer[50]\" value=\"461\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">b<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"462\" data-type=\"text\" data-vn=\"7\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[462]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[462]\" name=\"answer[50]\" value=\"462\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">c<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"466\" data-type=\"text\" data-vn=\"1\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[466]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[466]\" name=\"answer[50]\" value=\"466\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">d<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"477\" data-type=\"text\" data-vn=\"22\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[477]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[477]\" name=\"answer[50]\" value=\"477\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">e<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"478\" data-type=\"text\" data-vn=\"2\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[478]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[478]\" name=\"answer[50]\" value=\"478\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">f<\/span><\/label><\/div><\/li><li class=\"basic-answer col-xs-6 col-sm-6 cols-7\" style=\"padding:0px 0px;\" data-id=\"479\" data-type=\"text\" data-vn=\"1\" data-color=\"#000000\" data-make-link=\"no\" data-link=\"\"><div class=\"basic-answer-content basic-text-horizontal\"><label for=\"answer[479]\" class=\"basic-answer-label\"><input type=\"radio\" id=\"answer[479]\" name=\"answer[50]\" value=\"479\" autocomplete=\"off\"><span class=\"basic-text\" style=\"color: #ffffff; font-size: 14px; font-weight: normal;\" tabindex=\"0\">g<\/span><\/label><\/div><\/li><\/ul><\/div><div class=\"clearfix\"><\/div><\/div><div class=\"basic-vote\"><a href=\"#\" class=\"button basic-vote-button\" role=\"button\" style=\"background:#ffffff; border:1px; border-style: solid; border-color:#000000; border-radius:0px; padding:5px 10px; color:#000000; font-size:14px; font-weight:normal;\">&gt;&gt;&gt;<\/a><\/div><\/form><div class=\"yop-poll-modal\"><div class=\"yop-poll-modal-content\"><div class=\"yop-poll-modal-header\"><span class=\"yop-poll-modal-close\">&times;<\/span><\/div><div class=\"yop-poll-modal-body\"><div class=\"yop-poll-form-group\"><label class=\"yop-poll-user-or-email-label\">Username or Email Address<\/label><input type=\"text\" class=\"yop-poll-user-or-email-input\" autocomplete=\"off\"><\/div><div class=\"yop-poll-form-group\"><label class=\"yop-poll-password-label\">Password<\/label><input type=\"password\" class=\"yop-poll-password-input\" autocomplete=\"off\"><\/div><div class=\"yop-poll-form-group submit\"><button class=\"button button-primary button-large yop-poll-login-button\">Log In<\/button><\/div><div class=\"yop-poll-form-group yop-poll-section-login-options\"><p><a href=\"https:\/\/control-advent.com\/wp-login.php?action=register\" target=\"_blank\">No account? Register here<\/a><\/p><p><a href=\"https:\/\/control-advent.com\/wp-login.php?action=lostpassword\" target=\"_blank\">Forgot password<\/a><\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\n\n\n<p><strong>Related control theory topic: state estimation \/ observers<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The elves play different games during the weekends. The main aspect for them is that every rule is followed, the games are fair and everybody is having fun. Today, they agreed to play a round of \u201celf chess\u201d where one &hellip; <span class=\"more-link\"><a href=\"https:\/\/control-advent.com\/?p=1571\" class=\"readmore\">Continue reading<span class=\"screen-reader-text\">13 &#8211; Fancy a round of elf chess?<\/span><\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":1574,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[111],"class_list":["post-1571","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-english","tag-2025-en"],"_links":{"self":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1571","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1571"}],"version-history":[{"count":2,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1571\/revisions"}],"predecessor-version":[{"id":1583,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1571\/revisions\/1583"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/media\/1574"}],"wp:attachment":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1571"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}