1.0Problemistahttps://problemista.eu/enboguszhttps://problemista.eu/en/author/bogusz/rich600338<blockquote class="wp-embedded-content" data-secret="kwWihfbTYp"><a href="https://problemista.eu/en/2021/07/22/anderssen-theme/">Anderssen theme</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://problemista.eu/en/2021/07/22/anderssen-theme/embed/#?secret=kwWihfbTYp" width="600" height="338" title="“Anderssen theme” — Problemista" data-secret="kwWihfbTYp" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); </script> Anderssen theme White piece makes the interference and after the black move the white piece plays again giving an indirect check. black Anderssen theme Black piece makes the interference and after the white move the black piece plays again giving an indirect check. Tura, WaldemarBuletin Problemistic, 1990-911st Prize selfmate in 4 moves