45x45 square with question mark for use as "unknown" in chess templates
<a href="//commons.wikimedia.org/wiki/User:Antonsusi" title="User:Antonsusi">Antonsusi</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Antonsusi" title="User talk:Antonsusi"><span class="signature-talk">talk</span></a>)
Not applicable