rizon effect</em> - a position is bad but isn‚Äôt apparent for a few moves</p></li>
<li><p><em>singular extension</em> - allow searching for certain specific moves that are always good at deeper depths</p></li>
</ul>
</li>
<li><p><em>forward pruning</em> - ignore some branches</p>
<ul>
<li><p><em>beam search</em> - consider only n best moves</p></li>
<li><p>PROBCUT prunes some more</p></li>
</ul>
</li>
</ul>
</li>
<li><p>search vs lookup</p>
<ul>
<li><p>often just use lookup in the beginning</p></li>
<l