Editing Chess endgame (section)

====Bishop and pawn versus bishop on the same color====
{| align="right" border="0" cellpadding="1" cellspacing="0"
|-valign="top"
|
{{Chess diagram small
|tright
|Centurini
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |kl|  
|  |  |  |  |  |pl|  |  
|  |  |  |  |  |  |kd|bd
|  |  |bl|  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|Draw
}}
|
{{Chess diagram small
|tright
|Centurini, 1856
|  |  |kl|bl|  |  |  |  
|  |pl|  |  |  |  |  |  
|  |  |kd|  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |bd
|  |  |  |  |  |  |  |  
|Centurini showed how White to move wins.  White also wins if Black is to move.<ref>{{Harvcol|Müller|Lamprecht|2001|p=13}}</ref>
}}
|}
Two rules given by [[Luigi Centurini]] in the 19th century apply:
* The game is a draw if the defending king can reach any square in front of the pawn that is opposite in color to the squares the bishops travel on.
* If the defending king is behind the pawn and the attacking king is near the pawn, the defender can draw only if his king is attacking the pawn, he has the opposition, and his bishop can move on two diagonals that each have at least two squares available (other than the square it is on).<ref>{{Harvcol|Fine|Benko|2003|p=152}}</ref> This is the case for {{chessgloss|center pawn|central pawns}} and the {{chessgloss|bishop pawn}} whose promotion square is not the same color as the bishop.<ref>{{Harvcol|Fine|Benko|2003|p=154}}</ref>

The position in the second diagram shows a winning position for White, although it requires accurate play. A {{chessgloss|knight pawn}} always wins if the defending bishop only has one long diagonal available.<ref>{{Harvcol|Fine|Benko|2003|pp=155–56}}</ref>
{{clear}}

{{Chess diagram  
|tright
|Portisch vs. Tal, 1965
|  |  |  |kd|  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  
|kl|  |  |  |  |  |pd|  
|bl|  |bd|  |  |  |  |  
|  |  |  |  |  |  |  |  
|Position before 67.Bd5
}}
This position was reached in a game from the 1965 [[Candidates Tournament]] between [[Lajos Portisch]] and former [[World Chess Champion|World Champion]] [[Mikhail Tal]].<ref>[http://www.chessgames.com/perl/chessgame?gid=1113167 Portisch vs. Tal]</ref> White must defend accurately and utilize [[Zugzwang#Reciprocal zugzwang|reciprocal zugzwang]]. Often he has only one or two moves that avoid a losing position. Black was unable to make any progress and the game was drawn on move 83.<ref>{{Harvcol|Nunn|1995|p=169}}</ref>
{{clear}}