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'''[[Main Page|Home]] * [[EvaluationKnowledge]] * [[Game Phases]] * [[Endgame]] * [[Pawn EndgamePattern Recognition]] * Blockage Detection'''
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| rowspan="2" | '''Blockage Detection''',<br/>
a [[Pattern Recognition|pattern recognition]] technique to statically discover [[Pawn Rams (Bitboards)|rammed positions]] in [[Pawn Endgame|pawn endgames]], and permanently prevented kings from penetrating into opponent's camp. In those positions material advantage is not sufficient to win such games, otherwise only recognizably by a very deep [[Search|search]], when a [[Draw|draw]] by [[Fifty-move Rule|fifty-move rule]] rises the horizon. Best not only applied in [[Leaf Node|leaf node]] [[Evaluation|evaluation]], but as [[Interior Node Recognizer|interior node recognizer]] within the [[Search|search]], a detected blockade either [[Pruning|prunes]] forward or narrows the [[Window|search window]].
| <fentt border="double" style="font-size:24pt">4k3/8/3pPp2/1p1P1P1p/1P5P/5P2/3K4/8</fentt>
|- 4k3/8/3pPp2/1p1P1P1p/1P5P/5P2/3K4/8 w - -
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'''[[Pawn EndgamePattern Recognition|Up one level]]'''
