2015 Ukrainian postage stamp featuring sisters <a href="https://en.wikipedia.org/wiki/Anna_Muzychuk" class="extiw" title="w:Anna Muzychuk">Anna Muzychuk</a> and <a href="https://en.wikipedia.org/wiki/Mariya_Muzychuk" class="extiw" title="w:Mariya Muzychuk">Mariya Muzychuk</a>, Women's World Chess Champions.
Postage Service of Ukraine
<a rel="nofollow" class="external text" href="http://www.ukrchess.org.ua/docs/Marka/marka_r.html">Ukrainian Chess Federation</a>