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* [[Root|Root Node]] and the [[Leftmost Node|Leftmost Nodes]] are always PV-nodes
* In [[Principal Variation Search]], PV-nodes are defined by <span style="background-color: rgb(229, 229, 229)">beta-alpha>1</span>
* All [[Sibling nodeNode|Siblings]] of a PV-node are expected Cut-nodes
<span id="CUT"></span>
