{"version":"1.0","provider_name":"365Chess","provider_url":"https:\/\/www.365chess.com\/view","author_name":"Eric AFM Briffoz","author_url":"https:\/\/www.365chess.com\/view\/author\/bitopar\/","title":"Calculation Masterclass with IM Erlend Mikalsen - 365Chess","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"taAYrwL9Wi\"><a href=\"https:\/\/www.365chess.com\/view\/shop\/calculation-masterclass-with-im-erlend-mikalsen\/\">Calculation Masterclass with IM Erlend Mikalsen<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.365chess.com\/view\/shop\/calculation-masterclass-with-im-erlend-mikalsen\/embed\/#?secret=taAYrwL9Wi\" width=\"600\" height=\"338\" title=\"&#8220;Calculation Masterclass with IM Erlend Mikalsen&#8221; &#8212; 365Chess\" data-secret=\"taAYrwL9Wi\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(c,d){\"use strict\";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(\/[^a-zA-Z0-9]\/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),n=d.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),o=new RegExp(\"^https?:$\",\"i\"),l=0;l<n.length;l++)n[l].style.display=\"none\";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute(\"style\"),\"height\"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if(\"link\"===t.message)if(s=d.createElement(\"a\"),a=d.createElement(\"a\"),s.href=r.getAttribute(\"src\"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener(\"message\",c.wp.receiveEmbedMessage,!1),d.addEventListener(\"DOMContentLoaded\",t,!1),c.addEventListener(\"load\",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf(\"MSIE 10\"),a=!!navigator.userAgent.match(\/Trident.*rv:11\\.\/),i=d.querySelectorAll(\"iframe.wp-embedded-content\"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute(\"data-secret\")))r=Math.random().toString(36).substr(2,10),t.src+=\"#?secret=\"+r,t.setAttribute(\"data-secret\",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute(\"security\"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:\"ready\",secret:r},\"*\")}}}}(window,document);\n<\/script>\n","thumbnail_url":"https:\/\/www.365chess.com\/view\/wp-content\/uploads\/2025\/02\/24621.jpg","thumbnail_width":1254,"thumbnail_height":1254,"description":"In Calculation Masterclass, IM Erlend teaches you his unique calculation philosophy which blends intuition, forcing moves and brute force into a tool for seeing more deeply into chess positions than you ever thought you could. You'll discover how to instantly spot the critical moments where the calculation is needed, how to calculate precisely when defending against an attack, tactical wizardry and even the 5 most common calculation mistakes."}