Wrong rook pawn

Wrong rook pawn

Chess diagram|=
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Fine and Benko, position 418
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Draw because of the wrong rook pawnUsually when each side has a bishop and they are on opposite-colored squares and one side has two widely-separated pawns, the stronger side wins. However, if one of the pawns is the wrong rook pawn and the defending king is blocking it, the position is usually a draw because the defending bishop can stop the other pawn. If the defending bishop is sacrificed for the other pawn, the resulting position is a draw like the ones above harvcol|Fine|Benko|2003|p=192.Chess diagram|=
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de la Villa, position 9.3
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| | | | | |kd| |=
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Draw because of wrong rook pawnWith opposite-colored bishops, two connected pawns win if they safely reach the sixth rank, except when one is the wrong rook pawn, i.e. the defending bishop is on the long diagonal that includes the square on which the rook pawn would promote harvcol|de la Villa|2008|p=106.

Rook and rook pawn versus bishop

Chess diagram|=
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Berger (Fine & Benko position 930)
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|bd| | | | | | |=
White to move, draw.The wrong rook pawn may come up in other situations, such as this position with a rook and rook pawn versus a bishop. This time the bishop is defending against the rook pawn. If the pawn had not yet reached the fifth rank, White would win. Play might continue:: 1. Rb7 Bc2: 2. Kg5 Bd3: 3. Kh6 Kg8!: 4. Rg7+ Kf8!! (4... Kh8?? loses): ½-½White cannot win because his king cannot move to the "h5" square. If the bishop were on the other colored squares, White would win harvcol|Fine|Benko|2003|pp=468-72.

If the defending king is in the corner controlled by his bishop then the pawn can be sacrificed at the right moment to get to a winning rook versus bishop position. If the defending king is in the corner opposite his bishop's color, sacrificing the pawn does not work because the defender easily forms a fortress in the corner harvcol|Müller|Lamprecht|2001|pp=271–72. This is also referred to as the defending king being in the "safe" corner, since with the king in the corner with the bishop next to it, he is safe from the rook.

Example from game

Chess diagram|=
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Euwe-Hromádka, 1922
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rd| | | | |bl| | |=
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Black to move should win, but errs and allows a draw.In this position from a game between future World Champion Max Euwe and Karel Hromádka, Black should win but he errs by advancing his pawn too soon. [http://www.chessgames.com/perl/chessgame?gid=1006969 Euwe-Hromádka] Play continued:: 1... h4?? (Black wins easily after 1... Kh3!): 2. Bd4 Kh3? (Black still could have won here with 2... Re2!, but it is complicated.): 3. Be5 Rg2+: 4. Kf1! ½-½ harvcol|Dvoretsky|2006|p=237.

In studies

Rauzer

Chess diagram|=
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Study by Rauzer, 1928
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xo| | | |kl| | | |=
|xo| | |bl| | |xo|=
pd| |xo| |kd| |xo| |=
pl| | |xo| |xo| | |=
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White to move wins if the black king is on or below the lineIn this 1928 endgame study by Vsevolod Rauzer, White to move can force a win if the black king is on or below the line indicated. Similar positions were studied by Josef Kling and Bernhard Horwitz in 1851 and by Johann Berger in 1921. A very similar position occurred in the Korchnoi-Karpov game above harvcol|Griffiths|1992|pp=44-45, harvcol|Kasparov|2006|p=120.

Greco

Chess diagram|=
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Greco, 1623
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rd| | | | | | | |=
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| | | | |rl|pl|pl|=
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Black to play and drawThe theme is used in this 1623 composition by Gioachino Greco. Black draws::1...Ra1+:2. Rf1 Rxf1+:3. Kxf1 Bh3!and Black will sacrifice his bishop for the g-pawn or transform it into an h-pawn after 4. gxh3 harvcol|Averbakh|1996|p=85.

ee also

* chess endgame

Notes

References

* citation
last = Averbakh| first = Yuri|authorlink = Yuri Averbakh
year = 1996
title = Chess Middlegames: Essential Knowledge
publisher = Cadogan
id=ISBN 1-85744-125-7

*citation
last=Burgess |first=Graham |authorlink = Graham Burgess
title=The Mammoth Book of Chess
publisher=Carroll & Graf
year=2000
edition = 2nd
id=ISBN 978-0-7867-0725-6

*citation
last = de la Villa| first = Jesus
title = 100 Endgames You Must Know
publisher = New in Chess
year = 2008
id = ISBN 978-90-5691-244-4

* citation
last = Dvoretsky| first = Mark| authorlink = Mark Dvoretsky
year = 2006
title = Dvoretsky's Endgame Manual
edition = second
publisher = Russell Enterprises
id=ISBN 1-888690-28-3

*Citation
surname1=Fine|given1=Reuben|authorlink1=Reuben Fine
surname2=Benko|given2=Pal|authorlink2=Pal Benko
year=2003
edition=second
title=Basic Chess Endings (1941)
publisher=McKay
ID=ISBN 0-8129-3493-8

*citation
last = Griffiths| first = Peter
title = Exploring the Endgame
publisher = American Chess Promotions
year = 1992
id = ISBN 0-939298-83-X

*Citation
surname1=Kasparov|given1=Garry|authorlink1=Garry Kasparov
year=2006
title=My Great Predecessors, part V
publisher = Everyman Chess
ID=ISBN 1-85744-404-3

*citation
last = Mednis| first = Edmar| authorlink = Edmar Mednis
title = Questions and Answers on Practical Endgame Play
publisher = Chess Enterprises
year = 1987
id = ISBN 0-931462-69-X

*citation
last = Mednis| first = Edmar
title = Practical Bishop Endings
publisher = Chess Enterprises
year = 1990
id = ISBN 0-945470-04-5

*citation
surname1=Müller|given1=Karsten|authorlink1=Karsten Müller
surname2=Lamprecht|given2=Frank|authorlink2=Frank Lamprecht
year=2001
title=Fundamental Chess Endings
publisher=Gambit Publications
id=ISBN 1-901983-53-6

* Citation
last=van Perlo|first=Gerardus C.
title=Van Perlo's Endgame Tactics
year=2006
publisher=New In Chess
ID=ISBN 978-90-5691-168-3


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