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Created page with "'''Home * Evaluation * Pawn Structure * Holes''' FILE:BH LMC.png|border|right|thumb| Simulated view of a black hole <ref>Simulated view of a [https://..."
'''[[Main Page|Home]] * [[Evaluation]] * [[Pawn Structure]] * Holes'''
[[FILE:BH LMC.png|border|right|thumb| Simulated view of a black hole <ref>Simulated view of a [https://en.wikipedia.org/wiki/Black_hole black hole] (center) in front of the [https://en.wikipedia.org/wiki/Large_Magellanic_Cloud Large Magellanic Cloud]. Note the [https://en.wikipedia.org/wiki/Gravitational_lens gravitational lensing] effect, which produces two enlarged but highly distorted views of the Cloud. Across the top, the [https://en.wikipedia.org/wiki/Milky_Way Milky Way] disk appears distorted into an arc. [https://commons.wikimedia.org/wiki/File:BH_LMC.png Image] by [https://commons.wikimedia.org/wiki/User:Alain_r Alain r], September 08, 2006 [https://creativecommons.org/licenses/by-sa/2.5/deed.en CC BY-SA 2.5], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]
'''Holes''',<br/>
[[Squares|squares]] that cannot be possibly covered by own pawns, usually also [[Square Control|controlled]] by the enemy pawns. A typical example is d4 square after White forms a triangle consisting of pawns on c4, d3 and e4. Holes are excellent locations for enemy minor pieces, safer than [[Outposts|outposts]]. For that reason one should keep minor pieces to cover the holes in one's position. Along with [[Pawn Pattern and Properties|bitboard pawn patterns]], holes may be determined by the [[General Setwise Operations#RelativeComplement|relative complement]] of [[Attack Spans|front attack spans]] usually restricted to the area of the own 3rd and 4th [[Ranks|rank]] of the [[Center|extended center]].
=Sample=
<fentt border="double" style="font-size:24pt">......../......../......../......../..P[.]P.../...P..../......../........</fentt>
Hole on d4
=See also=
* [[Attack Spans]]
* [[Backward Pawn]]
=Forum Posts=
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/7d8a4124ce6f81ac# Pawn Structure "Holes" and Move Ordering] by [[Daniel A. Thies]] in [[Computer Chess Forums|rgcc]] February 12, 1996 » [[Move Ordering]]
* [http://groups.google.com/group/rec.games.chess.misc/msg/aedf418b6cb71b12 Re: Did Cray Blitz really have a win?] by [[Robert Hyatt]], [[Computer Chess Forums|rec.games.chess.misc]], March 12, 1999 » [[ACM 1985]], [[WCCC 1986]], [[Cray Blitz]]
=External Links=
* [https://en.wikipedia.org/wiki/Glossary_of_chess#Hole Hole | Glossary of chess from Wikipedia]
* [https://en.wikipedia.org/wiki/Pawn_structure#The_Sicilian_.E2.80.93_Boleslavsky_hole The Sicilian – Boleslavsky hole | Pawn structure from Wikipedia]
=References=
<references />
'''[[Pawn Structure|Up one Level]]'''
[[FILE:BH LMC.png|border|right|thumb| Simulated view of a black hole <ref>Simulated view of a [https://en.wikipedia.org/wiki/Black_hole black hole] (center) in front of the [https://en.wikipedia.org/wiki/Large_Magellanic_Cloud Large Magellanic Cloud]. Note the [https://en.wikipedia.org/wiki/Gravitational_lens gravitational lensing] effect, which produces two enlarged but highly distorted views of the Cloud. Across the top, the [https://en.wikipedia.org/wiki/Milky_Way Milky Way] disk appears distorted into an arc. [https://commons.wikimedia.org/wiki/File:BH_LMC.png Image] by [https://commons.wikimedia.org/wiki/User:Alain_r Alain r], September 08, 2006 [https://creativecommons.org/licenses/by-sa/2.5/deed.en CC BY-SA 2.5], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]
'''Holes''',<br/>
[[Squares|squares]] that cannot be possibly covered by own pawns, usually also [[Square Control|controlled]] by the enemy pawns. A typical example is d4 square after White forms a triangle consisting of pawns on c4, d3 and e4. Holes are excellent locations for enemy minor pieces, safer than [[Outposts|outposts]]. For that reason one should keep minor pieces to cover the holes in one's position. Along with [[Pawn Pattern and Properties|bitboard pawn patterns]], holes may be determined by the [[General Setwise Operations#RelativeComplement|relative complement]] of [[Attack Spans|front attack spans]] usually restricted to the area of the own 3rd and 4th [[Ranks|rank]] of the [[Center|extended center]].
=Sample=
<fentt border="double" style="font-size:24pt">......../......../......../......../..P[.]P.../...P..../......../........</fentt>
Hole on d4
=See also=
* [[Attack Spans]]
* [[Backward Pawn]]
=Forum Posts=
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/7d8a4124ce6f81ac# Pawn Structure "Holes" and Move Ordering] by [[Daniel A. Thies]] in [[Computer Chess Forums|rgcc]] February 12, 1996 » [[Move Ordering]]
* [http://groups.google.com/group/rec.games.chess.misc/msg/aedf418b6cb71b12 Re: Did Cray Blitz really have a win?] by [[Robert Hyatt]], [[Computer Chess Forums|rec.games.chess.misc]], March 12, 1999 » [[ACM 1985]], [[WCCC 1986]], [[Cray Blitz]]
=External Links=
* [https://en.wikipedia.org/wiki/Glossary_of_chess#Hole Hole | Glossary of chess from Wikipedia]
* [https://en.wikipedia.org/wiki/Pawn_structure#The_Sicilian_.E2.80.93_Boleslavsky_hole The Sicilian – Boleslavsky hole | Pawn structure from Wikipedia]
=References=
<references />
'''[[Pawn Structure|Up one Level]]'''
