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Created page with "'''Home * Evaluation * of Pieces * Blockade of Stop''' '''Blockade of Stop''',<br/> the obstruction of the Stop Square|stop squar..."
'''[[Main Page|Home]] * [[Evaluation]] * [[Evaluation of Pieces|of Pieces]] * Blockade of Stop'''
'''Blockade of Stop''',<br/>
the obstruction of the [[Stop Square|stop square]] of a [[Pawn|pawn]] mechanically prevents its advancement. While two opponent pawns head on head on the same file, a [[Pawn Rams (Bitboards)|pawn ram]], mutually block each other, the blockade of stop usually refers to [[Pieces|pieces]].
The more general term [[Blockade]] also refers to a [[Tactics|chess tactics]] where a [[Decoying|decoy]] [[Sacrifice|sacrifice]] is conducted to decisively reduce the [[Mobility|mobility]] of pieces or [[King|king]] as start of a [[Combination|combination]].
=Passed Pawns=
Most notably in [[Passed Pawn|passed pawn]] evaluation <ref>[https://www.stmintz.com/ccc/index.php?id=341763 Re: passed pawn evaluation] by [[Tord Romstad]], [[CCC]], January 12, 2004</ref>, the blockade of stop reduces the bonus by up to one rank less advanced or even more. Programs may further scale the blockade of stop penalty depending on piece type and color, where an opponent [[Bishop|bishop]], followed by opponent [[King|king]] and [[Knight|knight]] are most effective to blockade the stop. A [[Rook|rook]], either an own or opponent one, might already considered by the [[Tarrasch Rule|Tarrasch rule]], despite that rule also covers [[Pawn Spans#StopandDistantStop|tele stops]].
=Open Pawns=
In his ''Little Chess Evaluation Compendium'', [[Lyudmil Tsvetkov]] votes for a bonus for blocking none passed but [[Open Pawns (Bitboards)|open pawns]] without an opponent counter pawn on its [[Pawn Spans|front span]] <ref>[[Lyudmil Tsvetkov]] ('''2010, 2012'''). ''Little Chess Evaluation Compendium''. [[file:LittleChessEvaluationCompendium.pdf|September 2012 pdf]]</ref>.
=Development=
During the [[Opening|opening]], some programs apply penalties for stop square obstruction by own pieces of none developed center pawns.
=See also=
* [[Blockade]]
* [[Blockage Detection]]
* [[Connected Passed Pawns]]
* [[Control of Stop and Telestop]]
* [[Holes]]
* [[Passed Pawn]]
* [[Pawn Rams (Bitboards)]]
* [[Tarrasch Rule]]
=Publications=
* [https://en.wikipedia.org/wiki/Aron_Nimzowitsch Aron Nimzowitsch] ('''1925'''). ''Die Blockade''. [https://en.wikipedia.org/wiki/Bernhard_Kagan Bernhard Kagan], Berlin, English version by Philip Hereford ('''1929'''). ''The Blockade''. [http://nimzowitsch.net/die-blockade.html German online version] edited by [https://ratings.fide.com/card.phtml?event=4686730 Wilfried Krebbers], [http://nimzowitsch.net/startseite.html nimzowitsch.net]
* [https://en.wikipedia.org/wiki/Aron_Nimzowitsch Aron Nimzowitsch] ('''1925,1927'''). ''[https://de.wikipedia.org/wiki/Mein_System Mein System]''. [https://en.wikipedia.org/wiki/Bernhard_Kagan Bernhard Kagan], Berlin, English version by Philip Hereford ('''1930'''). ''[https://en.wikipedia.org/wiki/My_System My System]''. [https://en.wikipedia.org/wiki/Harcourt_(publisher) Harcourt, Brace and Company], [http://nimzowitsch.net/mein-system.html German online version] edited by [https://ratings.fide.com/card.phtml?event=4686730 Wilfried Krebbers], [http://nimzowitsch.net/startseite.html nimzowitsch.net] <ref>[http://dev.jeremysilman.com/shop/pc/My-System-p3821.htm My System (with The Blockade and other writings)] review by [https://en.wikipedia.org/wiki/Jeremy_Silman Jeremy Silman]</ref>
* [[Lyudmil Tsvetkov]] ('''2010, 2012'''). ''Little Chess Evaluation Compendium''. [[file:LittleChessEvaluationCompendium.pdf|December 03, 2012 pdf]]
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=341706 passed pawn evaluation] by macaroni, [[CCC]], January 11, 2004
=External Links=
* [http://www.chess.com/forum/view/game-analysis/the-blockade The Blockade] from [https://en.wikipedia.org/wiki/Chess.com Chess.com]
=References=
<references />
'''[[Evaluation of Pieces|Up one Level]]'''
'''Blockade of Stop''',<br/>
the obstruction of the [[Stop Square|stop square]] of a [[Pawn|pawn]] mechanically prevents its advancement. While two opponent pawns head on head on the same file, a [[Pawn Rams (Bitboards)|pawn ram]], mutually block each other, the blockade of stop usually refers to [[Pieces|pieces]].
The more general term [[Blockade]] also refers to a [[Tactics|chess tactics]] where a [[Decoying|decoy]] [[Sacrifice|sacrifice]] is conducted to decisively reduce the [[Mobility|mobility]] of pieces or [[King|king]] as start of a [[Combination|combination]].
=Passed Pawns=
Most notably in [[Passed Pawn|passed pawn]] evaluation <ref>[https://www.stmintz.com/ccc/index.php?id=341763 Re: passed pawn evaluation] by [[Tord Romstad]], [[CCC]], January 12, 2004</ref>, the blockade of stop reduces the bonus by up to one rank less advanced or even more. Programs may further scale the blockade of stop penalty depending on piece type and color, where an opponent [[Bishop|bishop]], followed by opponent [[King|king]] and [[Knight|knight]] are most effective to blockade the stop. A [[Rook|rook]], either an own or opponent one, might already considered by the [[Tarrasch Rule|Tarrasch rule]], despite that rule also covers [[Pawn Spans#StopandDistantStop|tele stops]].
=Open Pawns=
In his ''Little Chess Evaluation Compendium'', [[Lyudmil Tsvetkov]] votes for a bonus for blocking none passed but [[Open Pawns (Bitboards)|open pawns]] without an opponent counter pawn on its [[Pawn Spans|front span]] <ref>[[Lyudmil Tsvetkov]] ('''2010, 2012'''). ''Little Chess Evaluation Compendium''. [[file:LittleChessEvaluationCompendium.pdf|September 2012 pdf]]</ref>.
=Development=
During the [[Opening|opening]], some programs apply penalties for stop square obstruction by own pieces of none developed center pawns.
=See also=
* [[Blockade]]
* [[Blockage Detection]]
* [[Connected Passed Pawns]]
* [[Control of Stop and Telestop]]
* [[Holes]]
* [[Passed Pawn]]
* [[Pawn Rams (Bitboards)]]
* [[Tarrasch Rule]]
=Publications=
* [https://en.wikipedia.org/wiki/Aron_Nimzowitsch Aron Nimzowitsch] ('''1925'''). ''Die Blockade''. [https://en.wikipedia.org/wiki/Bernhard_Kagan Bernhard Kagan], Berlin, English version by Philip Hereford ('''1929'''). ''The Blockade''. [http://nimzowitsch.net/die-blockade.html German online version] edited by [https://ratings.fide.com/card.phtml?event=4686730 Wilfried Krebbers], [http://nimzowitsch.net/startseite.html nimzowitsch.net]
* [https://en.wikipedia.org/wiki/Aron_Nimzowitsch Aron Nimzowitsch] ('''1925,1927'''). ''[https://de.wikipedia.org/wiki/Mein_System Mein System]''. [https://en.wikipedia.org/wiki/Bernhard_Kagan Bernhard Kagan], Berlin, English version by Philip Hereford ('''1930'''). ''[https://en.wikipedia.org/wiki/My_System My System]''. [https://en.wikipedia.org/wiki/Harcourt_(publisher) Harcourt, Brace and Company], [http://nimzowitsch.net/mein-system.html German online version] edited by [https://ratings.fide.com/card.phtml?event=4686730 Wilfried Krebbers], [http://nimzowitsch.net/startseite.html nimzowitsch.net] <ref>[http://dev.jeremysilman.com/shop/pc/My-System-p3821.htm My System (with The Blockade and other writings)] review by [https://en.wikipedia.org/wiki/Jeremy_Silman Jeremy Silman]</ref>
* [[Lyudmil Tsvetkov]] ('''2010, 2012'''). ''Little Chess Evaluation Compendium''. [[file:LittleChessEvaluationCompendium.pdf|December 03, 2012 pdf]]
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=341706 passed pawn evaluation] by macaroni, [[CCC]], January 11, 2004
=External Links=
* [http://www.chess.com/forum/view/game-analysis/the-blockade The Blockade] from [https://en.wikipedia.org/wiki/Chess.com Chess.com]
=References=
<references />
'''[[Evaluation of Pieces|Up one Level]]'''
