Editing Checkmate (section)

===King and queen===
{| style="float:right;"
|-
| [[File:Chess kll45.svg]]
| [[File:Chess qll45.svg]]
| [[File:Chess kdl45.svg]]
|}
The first two diagrams show representatives of the basic checkmate positions with a [[queen (chess)|queen]], which can occur on any edge of the board. Naturally, the exact position can vary from the diagram. In the first of the checkmate positions, the queen is directly in front of the opposing king and the white king is protecting its queen. In the second checkmate position, the kings are in [[Opposition (chess)|opposition]] and the queen mates on the {{chessgloss|rank}} (or {{chessgloss|file}}) of the king.

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{{Chess diagram small
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|Support mate
|  |  |  |  |  |kd|  |  
|  |  |  |  |  |ql|  |  
|  |  |  |  |kl|oo|oo| 
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|The white king can also be on f6 or g6.<ref name=pand09p22>{{harvnb|Pandolfini|2009|p=22}}</ref>
}}
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{{Chess diagram small
|tleft
|Right triangle mate
|  |  |  |  |  |  |  |oo
|  |  |  |  |  |  |  |  
|  |  |  |  |  |kl|  |kd
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |oo
|  |  |  |  |  |  |  |oo
|  |  |  |  |  |  |  |oo
|  |  |  |  |  |  |  |ql
|The queen can also be on the marked squares.<ref name=pand09p23>{{harvnb|Pandolfini|2009|p=23}}</ref>
}}
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|Cornered mate
|  |  |  |  |  |  |  |  
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|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |kl|  
|  |  |  |  |  |  |  |  
|oo|oo|oo|oo|ql|oo|  |kd
|The queen can also be on the marked squares.<ref name=pand09p23 />
}}
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<!-- {{chess diagram-fen
|fen=8/8/8/7Q/8/7k/5K2/8
|size=23
|align=tleft
|reverse=false
|header= Outer row mate
|footer=<ref name=pand09p23>{{harvnb|Pandolfini|2009|p=23</ref>
}} -->
{{Chess diagram small
|tleft
|Outer row mate
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |ql
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |kd
|  |  |  |  |  |kl|  |  
|  |  |  |  |  |  |  |  
|{{harvnb|Pandolfini|2009|p=23}}
}}
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{{Clear}}
<!-- {{chess diagram-fen
|fen=8/8/8/8/4k3/8/8/QK6
|size=23
|align=tleft
|reverse=false
|header=
|footer= White checkmates easily in this position.
}} -->
{{Chess diagram  
|tleft
|
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
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|  |  |  |  |kd|  |  |  
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|ql|kl|  |  |  |  |  |  
|White checkmates easily.
}} 
With the side with the queen to move, checkmate can be forced in at most ten moves from any starting position, with [[optimal play]] by both sides, but usually fewer moves are required.<ref>{{harvnb|Fine|Benko|2003|pp=1–2}}</ref><ref>{{harvnb|Müller|Lamprecht|2001|p=16}}</ref> In positions in which a pawn has just [[promotion (chess)|promoted]] to a queen, at most nine moves are required.<ref>{{harvnb|Levy|Newborn|1991|p=144}}</ref>

In the position diagrammed, White checkmates easily by confining the black king to a rectangle and shrinking the rectangle to {{chessgloss|forcing   move|force}} the king to the edge of the board:

:{{pad}}'''1. Qf6 Kd5 2. Qe7 Kd4 3. Kc2 Kd5 4. Kc3 Kc6 5. Kc4 Kb6 6. Qd7 Ka6 7. Qb5+{{efn|7.Kc5 wins two moves faster.}} Ka7 8. Kc5 Ka8 9. Kc6 Ka7 10. Qb7{{chessAN|#}}'''<ref>{{harvnb|Seirawan|2003|pp=4–5}}</ref>
{{Clear}}

'''Avoid stalemate'''

The winning side must be careful to not [[stalemate]] the opposing king, whereas the defender would like to get into such a position. There are five general types of stalemate positions that can occur, which the stronger side must avoid. The first two are more common.<ref name=fine03p2>{{harvnb|Fine|Benko|2003|p=2}}</ref>
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{{chess diagram-fen
|fen=k7/2Q5/8/8/8/8/8/7K
|size=23
|align=tleft
|reverse=false
|header=
|footer= Stalemate if Black is to move. The queen blocks off all possible moves for Black, regardless of where the white king is placed on the board.
}}
<!-- {{Chess diagram small
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|kd|  |  |  |  |  |  |  
|  |  |ql|  |  |  |  |  
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|Stalemate if Black is to move. The white king can be anywhere (except a7, b7, or b8, which would be an {{chessgloss|illegal position}}).
}} -->
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<!-- {{chess diagram-fen
|fen=8/2Q5/k7/2K5/8/8/8/8 --
|size=23
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|header=
|footer= This is stalemate if Black is to move.
}} -->
{{Chess diagram small
|tleft
|
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |ql|  |  |  |  |  
|kd|  |kl|  |  |  |  |  
|  |  |oo|  |  |  |  |  
|oo|oo|oo|  |  |  |  |  
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|This is stalemate if Black is to move. Also stalemate if the white king is on one of the marked squares.
}}
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{{Chess diagram small
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|
|  |  |  |  |  |  |  |  
|  |ql|  |  |  |  |  |  
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|kd|  |  |  |  |  |  |  
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|oo|kl|  |  |  |  |  |  
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|This is stalemate if Black is to move. Also stalemate if the white king is on the marked square.
}}
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{{Chess diagram small
|tleft
|
|kd|  |kl|  |  |  |  |  
|  |  |oo|oo|oo|oo|oo|ql
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|This is stalemate if Black is to move. Also stalemate if the queen is on one of the marked squares.
}}
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{{Chess diagram small
|tleft
|
|kd|  |kl|  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |oo|  |  |  |  |  |  
|  |  |oo|  |  |  |  |  
|  |  |  |oo|  |  |  |  
|  |  |  |  |oo|  |  |  
|  |  |  |  |  |oo|  |  
|  |  |  |  |  |  |ql|  
|This is stalemate if Black is to move. Also stalemate if the queen is on one of the marked squares.
}}
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{{clear}}