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{{Short description|Chess endgame}}
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The [[chess]] [[Chess endgame|endgame]] of a '''queen versus pawn''' (with both sides having no other pieces except the [[King (chess)|kings]]) is usually an easy win for the side with the [[Queen (chess)|queen]]. However, if the [[Pawn (chess)|pawn]] has advanced to its seventh [[rank (chess)|rank]] it has possibilities of reaching a [[Draw (chess)|draw]], and there are some drawn positions with the pawn on the sixth rank. This endgame arises most often from a race of pawns to [[promotion (chess)|promote]].
If the pawn is not beyond its sixth rank, the attacker (to move) usually wins easily, but there are a few exceptions. The winning process is to either get the queen on a square in front of the pawn and moving the king over to help win the pawn or to check the defending king until it is forced in front of the pawn and using that [[tempo (chess)|tempo]] to bring the attacking king closer, until it can assist in winning the pawn.<ref>{{Harvcol|Fine|Benko|2003|p=529}}</ref> After the pawn is won, the attacker has an elementary [[checkmate]].<ref>{{Harvcol|Seirawan|2003|pp=49–53}}</ref>
{{algebraic notation|pos=tocleft}}
==Queen versus a pawn on the sixth rank==
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|Black to move, White wins
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The queen usually wins easily if the pawn is on the sixth rank. In
If Black plays 3...Ke2, White replies 4.Qe4+, forcing Black's king back in front of the pawn, and then advances his own king.
: '''5. Qd1 Kf4'''
: '''6. Qf1''' and White wins.<ref>{{Harvcol|Fine|Benko|2003|p=530}}</ref>
{{clear}}
===Exceptions===
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|White to move, draw (a rare exception because the white king blocks the queen)
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Exceptions can occur when the king blocks the queen on a [[file (chess)|file]] or diagonal, as in
White needs to [[pin (chess)|pin]] the pawn by 2. Qh8, but the king blocks the pin.
:'''2. Qb7+'''
This was White's only check which prevents the pawn from advancing, and Black responds
:'''2... Kc1!'''
repeating the position. If the white king is anywhere else (other than g7 and h8), the queen can pin the pawn and allow for the queen and then the king to approach.<ref>{{Harvcol|Fine|Benko|2003|p=530}}</ref>
{{clear}}
===Example===
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|Horowitz, 1957
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|White to move, 1.Qh6 wins
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The biggest problem for a queen versus a pawn on the sixth rank is when its own king gets in the way. In this position, the white king prevents the queen from getting on the a1 to h8 diagonal, to [[pin (chess)|pin]] the pawn to prevent it from advancing. White actually wins by:
:'''1. Qh6!!'''
Now if
: '''1... c2'''
then
:'''2. Qc1+'''
wins. If Black does not advance the pawn then the white queen can maneuver to pin the pawn along the diagonal, and wins easily.
If instead, White tries what may seem to be correct:
:'''1. Qh1+?'''
a draw results with correct play (but there are many chances for losing moves).
:'''1... Kb2!''' (1...Ka2 loses quickly to Qc1.)
:'''2. Qb7+''' (otherwise 2...c2 draws.)
:'''2... Kc1!'''
:'''3. Kf6!''' (White tries his best chance.)
:'''3... c2'''
:'''4. Ke5 Kd2'''
:'''5. Qd5+!'''
Black has five replies. Four of them lose, but
:'''5... Ke1!''' draws.
:'''6. Qa5+ Kd1''' (6...Ke2 loses to 7.Qa2.)
:'''7. Qa4 Kd2''' (7...Kc1 loses to 8.Qa2.)
:'''8. Qa2 Kc3!!'''
and White can make no progress.<ref>{{Harvcol|Horowitz|1957|pp=176–9}}</ref>
===Example from game===
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|Alatortsev vs. Chekhover
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|Position after 71.a8{{=}}Q <!-- The braces around = are necessary, otherwise caption will not show up. -->
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In this 1937 game between [[Vladimir Alatortsev]] and [[Vitaly Chekhover]],<ref>[http://www.chessgames.com/perl/chessgame?gid=1313041 Alatortsev vs. Chekhover]</ref> White wins:
:'''71... Ke3'''
:'''72. Qd5 Kf2'''
If 72...Ke2 then 73.Qe4+ Kf2 forces the Black king in front of the pawn.
:'''73. Kd7 Kg3'''
:'''74. Ke6 f2'''
:'''75. Qh1! 1–0'''<ref>{{Harvcol|Giddins|2012|p=123}}</ref>
{{clear}}
==Queen versus a pawn on the seventh rank==
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|White wins by 1.Qg5!, followed by 2.Qc1.
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In order for the defending side to have a chance at a draw (with the other side to move), the pawn must be on its seventh rank and the king must be
First note that the attacker may win easily, depending on the ___location of the kings.
{{clear}}
===Central pawn or knight pawn===
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|Black to move, White wins. White also wins against a knight pawn.
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If the pawn is a [[central pawn]] or [[knight pawn]] (i.e. on the b, d, e, or g-file), the queen wins easily, except for a few unusual positions. In
Black threatens to [[promotion (chess)|queen]] the pawn. White prevents this by forcing the black king in front of the pawn.
Without the immediate threat of promotion, White has gained a tempo that can be used to bring his king closer. This process is repeated.
: '''6. Kc6 Kf2 7. Qd2 Kf1 8. Qf4+ Kg1 9. Qe3+ Kf1 10. Qf3+ Ke1'''
And now White can again bring his king closer.
: '''11. Kd5 Kd2 12. Qf2 Kd1 13. Qd4+ Kc2 14. Qe3 Kd1 15. Qd3+ Ke1 16. Ke4! Kf2 17. Qf3+ Ke1 18. Kd3'''
and White wins the pawn and then checkmates. The winning process with a knight pawn is the same.<ref>{{Harvcol|Seirawan|2003|pp=49–53}}</ref>
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|White to move. If the White king is on d5 (or the marked squares d6 or d7), the game is drawn as the king interferes with the queen's ability to check.}}
In some cases, the attacking king can block its own queen, as in the second diagram. If the white king is on d5, d6 or d7, the queen cannot approach the pawn, and the result is a draw.<ref>{{Harvcol|Müller|Lamprecht|2001|p=313}}</ref>
{{clear}}
===Rook pawn===
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|White to move, draw
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The process above
In the first position, if the procedure above is tried,
and now the position is a stalemate unless White lets the black king back to the b-file.
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|White to move, White wins if his king is inside the region marked with "X"s.
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White can win similar positions if his king is close enough to the pawn.
and White checkmates.
If the white king was on e3, the win is simple:
===Bishop pawn===
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|White to move, draw; win if the king is inside the area
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A bishop pawn may also draw, but for a different reason (a different stalemate position).
and White
If the defending king is not on the side of the pawn near the corner and the attacking king is close enough, the game can still be won
{{Chess diagram
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|Lolli, 1763
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|White to move, White wins
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The second position is a 1763 [[endgame study]] by [[Giambattista Lolli]]. The black king must be prevented from getting to the other side of his pawn, otherwise he can employ the stalemate defense.
: '''1. Qb3! Kd2'''
: '''2. Qb2 Kd1'''
: '''3. Kf3! Kd2''' (3...c1=Q 4.Qe2#, or 3...c1=N and White checkmates in three moves: 4.Ke3 Nb3 5.Qc3, and checkmate on the next move.)
: '''4. Kf2 Kd1'''
: '''5. Qd4+ Kc1'''
: '''6. Qb4!''' Black is in [[zugzwang]]
: '''6... Kd1'''
: '''7. Qe1#'''<ref>{{Harvcol|Fine|Benko|2003|pp=526–29}}</ref><ref>{{Harvcol|Angos|2005|p=144}}</ref>
{{clear}}
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|White to move wins since the king is inside the area
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: '''5. Kg3''' (of course not 5. Qxf2 stalemate)
: '''6. Qh8+'''
and White checkmates in two more moves.<ref>{{Harvcol|Snape|2003|p=88}}</ref> Note that it is possible to win against a bishop pawn on the seventh rank and the king in the corner if the attacking king and queen are in the proper position. White wins if the king is close enough to move to one of the squares marked with dots in two moves.<ref>{{Harvcol|de la Villa|2008|p=64}}</ref>
====Example from game====
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|van Wely vs. Leko, 1996
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|Position after 60...c2, draw
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This position from a 1996 game between [[Loek van Wely]] and [[Peter Leko]] was drawn because of the bishop pawn.<ref>[http://www.chessgames.com/perl/chessgame?gid=1269889 van Wely vs. Leko]</ref>
{{clear}}
====Petrosian versus Fischer====
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|+ Petrosian vs. Fischer, 1958
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|Final position after 67.f7
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|Analysis position after 69...c2
}}<!-- Deleted image removed: [[File:PetrosianFischer1958.jpg|right|thumb|Fischer (left) and Petrosian (right), 1958]] -->
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{{clear}}
The first position is from the end of a 1958 game between future [[World Chess Championship|World Champions]] [[Tigran Petrosian]] and [[Bobby Fischer]].<ref>[http://www.chessgames.com/perl/chessgame?gid=1008374 Petrosian vs. Fischer]</ref> The players [[draw by agreement|agreed to a draw]] because of the stalemate defense (above). The game could continue 67...Rxg6+ 68.Kxg6 Kb1 69.f8=Q c2 to the second position, which is a draw.<ref>{{Harvcol|Fischer|2008|p=31}}</ref>
====Traps====
{{Chess diagram
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|de la Villa, position 4.10
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|A trap for Black
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There are some traps arising in the endgame with the bishop pawn when the attacking king is not quite close enough to force a win. In this position play could go:
:'''1. Qb3+ Ka1! 2. Qe3 Kb1 3. Qe4 Kb2'''
3...Ka1 also draws.
:'''4. Qe2'''
Setting the trap, and now
:'''4... Ka1!'''
is the only move to draw. The alternative move 4...Kb1?? is a typical mistake, allowing 5.Kc4!! c1=Q+ 6.Kb3, winning. If instead 4...Kc3??, then 5.Qe5+!, forcing the black king to the wrong side of the pawn and then the white king will be close enough to assist.<ref>{{Harvcol|de la Villa|2008|pp=65–66}}</ref>
{{clear}}
{{Chess diagram
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|de la Villa, position 4.12
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|Trap on the other side of the pawn
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The same trick can be tried with the king on the other side of the pawn. The white king is not close enough to force a win in this position, but the defense is difficult.
:'''1. Qb2 Kd1 2. Qb3 Kd2 3. Qa2!?'''
Setting the trap.
:'''3... Kc3!'''
The only move to draw.
:'''4. Qa1+ Kd2''', draw
If instead 3...Kd1??, then 4.Kd4! c1=Q 5.Kd3 wins. If 3...Kd3??, then 4.Qb2 and Black has to allow a [[pin (chess)|pin]] to avoid 5.Qc1. After 4...Kd2 the white king gets close enough to win with 5.Ke4.<ref>{{Harvcol|de la Villa|2008|p=66}}</ref>
===Extra pawn for the defense===
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|Müller & Lamprecht
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|White to move wins – the extra pawn deprives Black of the stalemate defense.
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An extra pawn for the defense may be a disadvantage because it deprives the defender of the stalemate defense. In this position, White wins:
:'''1. Qg4+ Kh2'''
:'''2. Qf3! Kg1'''
:'''3. Qg3+! Kf1'''
3...Kh1 loses after 4.Qxf2. If black did not have the extra pawn, this would be stalemate instead.
:'''4. Kc4'''
and White wins.<ref>{{Harvcol|Müller|Lamprecht|2007|p=42}}</ref>
{{clear}}
==See also==
* [[Chess endgame]]
==Notes==
{{reflist}}
==References==
* {{Citation
|last=Angos|first=Alex
|title=You Move ... I Win!: A Lesson in Zugzwang
|year=2005
|publisher=Thinkers' Press, Inc.
|isbn= 978-1-888710-18-2
}}
*{{citation
| last = de la Villa| first = Jesús|author-link=Jesús de la Villa
| title = 100 Endgames You Must Know
| publisher = [[New in Chess]]
| year = 2008
| isbn= 978-90-5691-244-4
}}
*{{Citation
|last1=Fine|first1=Reuben|author-link1=Reuben Fine
|last2=Benko|first2=Pal|author-link2=Pal Benko
|year=2003
|title=[[Basic Chess Endings]]
|orig-year=1941
|publisher=McKay
|isbn= 0-8129-3493-8
}}
*{{Citation
|last=Fischer|first=Bobby|author-link=Bobby Fischer
|year=2008
|orig-year=1969
|title=[[My 60 Memorable Games]]
|publisher=Batsford
|isbn= 978-1-906388-30-0
}}
* {{Citation
|last=Flear|first=Glenn|author-link=Glenn Flear
|title=Starting Out: Pawn Endings
|year=2004
|publisher=[[Everyman Chess]]
|isbn= 1-85744-362-4
}}
*{{citation
|last=Giddins|first=Steve|author-link=Stephen Giddins
| year=2012
| title=The Greatest Ever Chess Endgames
| publisher=[[Everyman Chess]]
| isbn=978-1-85744-694-4}}
*{{Citation
|last=Horowitz|first=I. A.|author-link=I. A. Horowitz
|year=1957
|title=How to Win in the Chess Endings
|publisher=McKay
}}
*{{Citation
|last1=Müller|first1=Karsten|author-link1=Karsten Müller
|last2=Lamprecht|first2=Frank |author-link2=Frank Lamprecht
|year=2001
|title=Fundamental Chess Endings
|publisher=[[Gambit Publications]]
|isbn= 1-901983-53-6
}}
*{{Citation
|last1=Müller|first1=Karsten <!-- |author-link=Karsten Müller -->
|last2=Lamprecht|first2=Frank <!-- |author-link2=Frank Lamprecht -->
|year=2007
|title=Secrets of Pawn Endings
|publisher=Gambit Publications <!-- [[Gambit Publications]] -->
|isbn= 978-1-904600-88-6
}}
*{{Citation
|last=Seirawan|first=Yasser|author-link=Yasser Seirawan
|title=Winning Chess Endings
|year=2003
|publisher=Everyman Chess
|isbn= 1-85744-348-9
}}
*{{Citation
|last=Snape|first=Ian
|title=Chess Endings Made Simple: How to Approach the Endgame with Confidence
|year=2003
|publisher=Gambit Publications
|isbn= 1-901983-97-8
}}
==External links==
* [https://www.youtube.com/watch?v=mEypLNcdjOY On Youtube, video from "Chessnetwork", Explanation + Quiz, 48 min]
* [https://www.youtube.com/watch?v=ipR0Rn9S_-k On Youtube, video by Jonathan Schrantz from Saint Louis Chess Club's Channel, 52 min]
* [https://www.youtube.com/watch?v=Ji8NjJknEjY On Youtube, video by "Hanging Pawns", 17 min]
{{Chess}}
[[Category:Chess endgames]]
[[Category:Chess theory]]
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