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Created page with "'''Home * Evaluation * Pawn Structure * Candidate Passed Pawn''' {| |- style="vertical-align:top;" | rowspan="2" | '''Candidate passed pawn''',<br/> a [..."
'''[[Main Page|Home]] * [[Evaluation]] * [[Pawn Structure]] * Candidate Passed Pawn'''
{|
|- style="vertical-align:top;"
| rowspan="2" | '''Candidate passed pawn''',<br/>
a [[Pawn|pawn]] on a [[Half-open file|half-open file]], which, if the board had only pawns on it, would eventually become a [[Passed Pawn|passed pawn]] by moving forward. Whereas this definition is obvious for a human, in a form presented above it would require no less than a separate [[Recursion|recursive]] search routine. For that reason, computers have to use approximations of that rule.
One possibility is to define a pawn as a candidate, if no square on its path is controlled by more enemy pawns than own pawns. However, this simple heuristics rules out an early recognition of a candidate passed pawns. For example with white pawns on a4 and b5 and black pawn on a7, the b5 pawn would be viewed as a candidate passer only after a4-a5.
| <fentt border="double" style="font-size:24pt">8/p7/8/PP3ppp/8/5P1P/8/8</fentt>
|-
| White and Black candidates (b5, g5)
|}
=See also=
* [[Candidates (Bitboards)]].
* [[Faker]]
* [[Hidden Passed Pawn]]
* [[Passed Pawn]]
* [[Pawn Majority]]
* [[Unstoppable Passer]]
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=476471 How to define a candidate passer] by [[Jan Willem de Kort]], [[CCC]], January 03, 2006
* [https://www.stmintz.com/ccc/index.php?id=489960 Outside passer and candidate passer: definition wanted! :-)] by [[Alessandro Scotti]], [[CCC]], February 27, 2006
* [http://www.talkchess.com/forum/viewtopic.php?t=37748 Improving evaluation of passed pawns] by [[Ben-Hur Carlos Vieira Langoni Junior]], [[CCC]], January 22, 2011 » [[Passed Pawn]]
=External Links=
* [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>[[Hans Kmoch]] ('''1959, 1990'''). ''Pawn Power in Chess''. New York: Dover, 1990. Previous ed.: New York: McKay, 1959. ISBN 0-486-26486-6</ref>
* [https://en.wikipedia.org/wiki/Candidates_Tournament Candidates Tournament from Wikipedia]
=References=
<references/>
'''[[Pawn Structure|Up one Level]]'''
{|
|- style="vertical-align:top;"
| rowspan="2" | '''Candidate passed pawn''',<br/>
a [[Pawn|pawn]] on a [[Half-open file|half-open file]], which, if the board had only pawns on it, would eventually become a [[Passed Pawn|passed pawn]] by moving forward. Whereas this definition is obvious for a human, in a form presented above it would require no less than a separate [[Recursion|recursive]] search routine. For that reason, computers have to use approximations of that rule.
One possibility is to define a pawn as a candidate, if no square on its path is controlled by more enemy pawns than own pawns. However, this simple heuristics rules out an early recognition of a candidate passed pawns. For example with white pawns on a4 and b5 and black pawn on a7, the b5 pawn would be viewed as a candidate passer only after a4-a5.
| <fentt border="double" style="font-size:24pt">8/p7/8/PP3ppp/8/5P1P/8/8</fentt>
|-
| White and Black candidates (b5, g5)
|}
=See also=
* [[Candidates (Bitboards)]].
* [[Faker]]
* [[Hidden Passed Pawn]]
* [[Passed Pawn]]
* [[Pawn Majority]]
* [[Unstoppable Passer]]
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=476471 How to define a candidate passer] by [[Jan Willem de Kort]], [[CCC]], January 03, 2006
* [https://www.stmintz.com/ccc/index.php?id=489960 Outside passer and candidate passer: definition wanted! :-)] by [[Alessandro Scotti]], [[CCC]], February 27, 2006
* [http://www.talkchess.com/forum/viewtopic.php?t=37748 Improving evaluation of passed pawns] by [[Ben-Hur Carlos Vieira Langoni Junior]], [[CCC]], January 22, 2011 » [[Passed Pawn]]
=External Links=
* [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>[[Hans Kmoch]] ('''1959, 1990'''). ''Pawn Power in Chess''. New York: Dover, 1990. Previous ed.: New York: McKay, 1959. ISBN 0-486-26486-6</ref>
* [https://en.wikipedia.org/wiki/Candidates_Tournament Candidates Tournament from Wikipedia]
=References=
<references/>
'''[[Pawn Structure|Up one Level]]'''
