Tarrasch rule

Tarrasch rule

The Tarrasch rule is a general principle that applies in the majority of chess middlegames and endgames. Siegbert Tarrasch stated the "rule" that rooks should be placed behind passed pawns – either yours or your opponent's. The idea behind the rule (actually a guideline) is that (1) if a player's rook is behind his passed pawn, the rook protects it as it advances, and (2) if it is behind an opponent's passed pawn, the pawn cannot advance unless it is protected along its way.

The original quote, from page 57 of his book "The Game of Chess" (1938) is

"In complicated Rook endings the most important rule is one laid down by the author: The Rook's place is behind the passed pawn; behind the enemy pawn in order to hold it up, behind one's own in order to support its advance." [http://books.google.com/books?id=5XmN60ps1L0C&pg=PA57&lpg=PA57&dq=+%22In+complicated+Rook+endings+the+most+important+rule+%22&source=web&ots=6CoJGf1HZ0&sig=EOyVwIMbUuSJQuNXbCxc4jk0Sgk&hl=en Book source]

This "rule" is usually true, but not always, as there are many exceptions. Tarrasch has been quoted as saying, "Always put the rook behind the pawn.... Except when it is incorrect to do so." harvcol|Soltis|2003|p=129.

Reasons

The advance of the passed pawn lengthens the range of a rook behind and reduces the range of a rook in front. A rook escorting a pawn from ahead must move off, potentially leaving the pawn undefended, if it is to queen. A rook behind an enemy passed pawn can more readily generate counterplay.

Illustrations

Here are two positions to illustrate the principle.

Rook behind own passed pawn: win

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Alekhine-Capablanca, game 34, 1927
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Position after 54. Rf4-a4. Rook behind its own passed pawn.
In the first diagram, White's rook is behind his passed pawn on the "a"-file, and the position is won for White.

The winning technique is straightforward:
#Move the king towards the passed pawn. The defending king must also move that way, otherwise he will be forced to give up his rook for the pawn.
#If the attacking king can penetrate no further because the defending king is in opposition, use tempo moves by the rook up and down the file. Once pawn moves are exhausted, then the defender runs out of options.
#If the defending rook retreats, then advance the pawn. The defender cannot keep up this strategy. If the defending king sidesteps away from the pawn, the attacking king moves towards the pawn, and forces its advance. The defender will have to give up his rook. So the only option is for the defending king to move towards the pawn.
#The attacking king penetrates the kingside pawn structure as far as possible. If the defender wins the passed pawn, an exchange of rooks ensues and the resulting pawn ending is an easy win for the attacker.
#At the right moment, the attacking rook abandons the pawn and joins in the attack on the kingside pawns.The 34th game of the 1927 World Championship match between Alekhine and Capablanca is a classic example of the technique (see [http://www.chessgames.com/perl/chessgame?gid=1012518 unannotated JavaScript board] or [http://www.enpassant.dk/chess/palview/p3demo/iframeg.htm annotated text] ). The position is after White's 54. Ra4. White won on move 82 Harvcol|Korchnoi|2002|p=15.


Rook behind enemy passed pawn: usually a draw

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Mecking-Korchnoi, 1974.
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Rook behind enemy passed pawn. Position is after White's 35th move; drawn.
Similar positions with the rook behind the enemy passed pawn are usually a draw, but not always. The next position is after White's 35th move in the eighth game of the Henrique Mecking versus Victor Korchnoi match in 1974. White will move Ra6 as soon as possible. Black's rook is in front of his passed pawn on the "a" file, and the game ended in a draw on move 55 Harvcol|Korchnoi|2002|pp=15-16.

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Anand-Kramnik, World Championship, 2007
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Position after 35... Rxa3. Rook in front of its passed pawn, opposing rook will get behind the pawn. The game was drawn 30 moves later.
In the game between Viswanathan Anand and Vladimir Kramnik from the 2007 World Chess Championship, Black's rook is in front of his passed pawn; the white rook will get behind the pawn:

: 36. Kf2 h5: 37. g3 a5: 38. Ra7Black advanced the pawn to "a2", but could do no better than to exchange the passed pawn and rook for the white rook, reaching a king and pawn endgame that ended in a draw (see stalemate) on move 65 harvcol|Benko|2008|p=49.

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Unzicker-Lundin, 1954.
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Rook behind enemy passed pawn. White to move wins.
In the position between Wolfgang Unzicker and Erik Lundin, White to move wins, however 48. f3+! is the only winning move. If the black pawn were still on f7, the black king could go back to f6 or g7 and the position would be a draw. (If 48. a7? Ra2+ and 49... Kf3 draws.) [ [http://www.chesscafe.com/text/dvoretsky38.pdf The Instructor ] ]

New analysis

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Rook behind enemy passed pawn
The reason this type of position was long thought to be an easy draw is as follows:
#White cannot advance his pawn to the seventh rank, because that would deprive his king of any shelter
#So White must advance his pawn only up to the sixth, so the king can find shelter on a7
#White's only real winning attempt was to move his king up to a7. Then he can play Rb8-b6, Kb7, a7 (threatening Ra6), forcing Black to give up his rook for the pawn.
#But while White is spending all this time, Black's rook can win White's kingside pawns, then advance the newly made passed pawns.
#It has been known for White to even lose this battle of rook versus many passed pawns.
#Thus if White tries too hard to win, he may actually lose.

Recent theoretical analysis of this position shows that White has a strong maneuver:
#advance the pawn to the sixth rank
#move the king towards the queenside
#when the black rook takes a kingside pawn, switch the rook to guarding the pawn from the c-file, i.e. Rc7 then advance the pawn to a7.
#Switch the white rook to the a-file with gain of tempo. Thus Black is forced to sacrifice his rook for the pawn without White having to move his king all the way to a7. These many extra tempos make the difference between winning and drawing or even losing. [ [http://www.chesscafe.com/text/dvoretsky38.pdf The Instructor ] ] Black must play very carefully to draw, rather than the very easy draw that was long thought to be the case. [ [http://www.chesscafe.com/text/dvoretsky39.pdf The Instructor ] ]

Chess diagram|=
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V. Kantorovich, 1988 and J. Steckner, 2003
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This position was thought to be drawn, but White wins.
Kantorovich analyzed the position in the diagram on the right and thought that Black draws with two tempos to spare. In 2003 Steckner found an improvement for White that wins. Black's pieces are in their optimum positions: the rook is behind the a-pawn an attacking the f-pawn and the king is in its most active location. If 1. Ra8 Kf5 Black has an easy draw. However, White has a better plan which wins with precise play::1. Kd4! (The f-pawn must be sacrificed because the rook is on a7.):1... Rxf2:2. Rc7! Ra2:3. a7 (3. Rc6+ leads to a draw):3... Kf5 :4. Kc4!! (The old analysis was 4. Rxf7+, leading to a draw.):4... Kg4:5. Kb3! Ra6:6. Rc4+ Kxg3:7. Ra4 Rxa7:8. Rxa7 Kxh4 :9. Kc3 Kg3:10. Kd2 h4:11. Ke2 kg2:12. Rxf7 h3:13. Rf2+ Kg3:14. Rf6 and White wins harvcol|Dvoretsky|2006|pp=193ff.

Exceptions

There are exceptions to the Tarrasch rule. Here are some.Chess diagram small|=
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Purdy
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White to move draws by repeatedly checking from the first rank.

* In the rook and pawn versus rook endgame, if the pawn is not beyond its fourth rank, the best place for the defending rook is in front of the pawn Harvcol|Howell|1997|pp=38-40, harvcol|Dvoretsky|2006|pp=150ff|.

* On a similar note, Cecil Purdy said that a rook is best behind its passed pawn if it is on the fifth rank or higher, or can reach those ranks. If the pawn is held up before the fifth rank, the rook is better in front of the pawn. Often the rook is best protecting the pawn from the side if it is on the fifth rank or higher harvcol|Purdy|2003|p=114.

* In the ending of a rook and pawn versus a rook, if the defending king is cut off from the pawn's file, then the best defence is with the rook on its first rank Harvcol|Howell|1997|p=37. See the frontal defense.

* In the ending of a rook and pawn versus a rook, where the pawn is a knight pawn (b- or g-file), the defending king is in front of the pawn, but the defender can't get his rook to the third rank for the drawing Philidor position, the defending rook draws on its first rank but loses if it is attacking the pawn from behind harvcol|Mednis|1982|p=16, Harvcol|Fine|Benko|2003|p=295.

* In the ending of a rook versus a pawn or pawns, the rook is best placed on its first rank Harvcol|Fine|Benko|2003|pp=275-92, harvcol|Mednis|1998|p=47.

* In the ending of a rook and two isolated pawns versus a rook, it is generally better for the stronger side to protect the pawns from the side harvcol|Mednis|1982|p=29|.

* Yuri Averbakh said that the Tarrasch rule is usually correct when only the rooks are battling over the pawn, but when the pawn is blocked by the opposing king, the rook of the same color as the pawn is normally better protecting the pawn from the side Harvcol|Emms|1999|p=87.

hort-Yusupov

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Short-Yusupov, 1984
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white to move, an exception to the Tarrasch rule.
In the position from Nigel Short and Artur Yusupov in 1984, as an exception to the rule, since white's king is stuck in front of the pawn harvcol|Müller|Lamprecht|2001|p=199. White played 1. Rh3 (rook behind passed pawn), black replied 1. ... Kf5 and a draw resulted a few moves later. The move 1. Rf7 by White leads to a win.

Kharlov-Morozevich

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Kharlov-Morozevich, 1995
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Black to move, exception to the Tarrasch rule.
The position from Kharlov-Morozevich as one in which the Tarrasch rule doesn't apply (for Black) Harvcol|Emms|1999|pp=115-16. The move 1. ...Rb7 would be in accordance with the Tarrasch rule, but 1. ... Re5 is the correct method because White's king is cut off from the pawn, White will have to spend a lot of time activating his rook, and by that time the black king will be able to get over to the queenside. The rule still applies for White, however, and the game continued:

: 2. Rd4 Kf6 3. Rd8 Ke7 4. Rb8 Kd7 5. Rb7+ Kc6 6. Rxf7 b4 7. Rf6+ Kb5 8. Rxg6 b3 9. Rg8 Re6 10. Rb8+ Rb6 11. Rd8 b2 12. Rd1 Rc6 13. resign, 0-1.After 13 Kg2 Rc1 14. Rd8 b1=Q 15. Rb8+ Rb6 16. Rxb1 Rxb1 Black's king is close enough to the kingside pawns to stop them.

Kramnik-Beliavsky

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Kramnik-Beliavsky, 1993
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1. Ra1 loses, 1. Rb8 draws.
The 1993 game between Vladimir Kramnik and Alexander Beliavsky has an unusual position in which following the Tarrasch Rule is incorrect. White played 1. Ra1 and lost. Interestingly, 1. Rb8, abandoning the pawn so the rook can attack from behind, draws. The endgame with rooks and f- and h-pawns was analyzed to be a draw by Mikhail Botvinnik in the 1940s (with correct defense) harvcol|Beliavsky|Mikhalchishin|2003|p=86, 89-90.

Yusupov-Timman

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Yusupov-Timman, 1992
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White to move: 35. Re4 wins but 35. Ra1 draws.
In this 1992 game [http://www.chessgames.com/perl/chessgame?gid=1143240] between Artur Yusupov and Jan Timman, 35. Re4! wins but 35. Ra1? in the actual game only draws. The game was drawn twenty moves later Harvcol|Müller|Pajeken|2008|p=280.

ee also

* Chess strategy
* Chess endgame
* Rook and pawn versus rook endgame

Notes

References

* Citation
surname1 = Beliavsky| given1 = Alexander|authorlink1 = Alexander Beliavsky
surname2 = Mikhalchishin| given2 = Adrian |authorlink2 = Adrian Mikhalchishin
year = 2003
title = Modern Endgame Practice
publisher = Batsford
ID=ISBN 0-7134-8740-2

* citation
surname1=Benko|given1=Pal|authorlink1=Pal Benko
year = 2008
month = January
title = The 2007 World Championship
journal = Chess Life
volume = 2008
issue = 1
pages = 48-49
doi =
id =
url =
format =
accessdate =

* Citation
surname1 = Dvoretsky
given1 = Mark
authorlink1 = Mark Dvoretsky
year = 2006
title = Dvoretsky's Endgame Manual
edition = second
publisher = Russell Enterprises
ID=ISBN 1-888690-28-3

*Citation
surname1=Emms|given1=John|authorlink1=John Emms (chess player)
tear=1999
title=The Survival Guide to Rook Endings
publisher=Everyman Chess
ID=ISBN 1-85744-235-0

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

*Citation
surname1=Howell|given1=James|authorlink1=
year=1997
title=Essential Chess Endings: The tournament player's guide
publisher=Batsford
ID=ISBN 0-7134-8189-7

*Citation
surname1=Korchnoi|given1=Victor|authorlink1=Victor Korchnoi
year=2002
title=Practical Rook Endings
publisher=Olms
ID=ISBN 3-283-00401-3

*Citation
surname1=Mednis|given1=Edmar|authorlink1=Edmar Mednis
year=1982
title=Practical Rook Endings
publisher=Chess Enterprises
ID=ISBN 0-931462-16-9

*Citation
surname1=Mednis|given1=Edmar
year=1998
title=Practical Endgame Tips
publisher=Cadogan Chess
ID=ISBN 1-85744-213-X

*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
surname1=Müller|given1=Karsten
surname2=Pajeken|given2=Wolfgang
year=2008
title=How to Play Chess Endings
publisher=Gambit Publications
ID=ISBN 978-1-904600-86-2

* Citation
last = Purdy|first = C.J.S. |authorlink = Cecil Purdy
title = C.J.S. Purdy on the Endgame
year = 2003
publisher = Thinker's Press
ISBN=978-1-888710-01-8

*Citation
surname1=Soltis|given1=Andy|authorlink1=Andrew Soltis
year=2003
title=Grandmaster Secrets: Endings
publisher=Thinker's Press
ID=ISBN 0-938650-66-1


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