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The '''Hidden Passed Pawn''' is an evaluation term used in [[Crafty]], in the terminology proposed by [[Hans Kmoch]] it is referred to as a [[Candidates (Bitboards)#Sneaker|Sneaker]] <ref>[[Hans Kmoch]] ('''1959, 1990'''). ''Pawn Power in Chess''. New York: Dover, 1990. Previous ed.: New York: McKay, 1959. ISBN 0-486-26486-6</ref> <ref>[https://www.chess.com/forum/view/chess-equipment/pawn-power-in-chess-by-hans-kmoch-glossary-of-terms Pawn Power in Chess by Hans Kmoch - Glossary of Terms - Chess Forums] - [https://en.wikipedia.org/wiki/Chess.com [Chess.com]]</ref>. It is a [[Pawn Rams (Bitboards)|rammed pawn]] already on the opponent side of the board without further [[Sentry|sentries]], which may become a [[Passed Pawn|passer]] through a sacrificial combination usually by a [[Faker|faker]], which possibly allows the opponent to establish a passer as well, though at least two ranks less advanced and losing the [[Pawn Race|pawn race]] assuming both [[Unstoppable Passer|unstoppable]].