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Subj:
The Bishop case
Date:
Date: 6/15/2003 9:58:35 PM Mountain Daylight Time
From: an13on
To:
service@chess-poster.com
Is there any
position where the rule that a Pawn
could become a Bishop, is in fact
useful? i.e. I'm looking for a
position where white will mate black in a few moves, and should
do so with as few moves as possible. The mating process involves
leading a Pawn into the last rank.
That does not necessarily have to be the next move. If white
chooses to turn the Pawn into a
Bishop, he will mate in FEWER moves
than if it was turned into a Queen,
Rook or a Knight.
That's the kind of position I'm looking for, but I suspect it's
impossible.
chess-poster.com
Dear
viewer,
We found the following game
(Tomic
/ Winzbeck, Dortmund 1993) which may ilustrate an example of a Bishop case position you are
looking for:
White to move
By moving white
the Rook to 1. d8, the only good move for black is 1... RxR (1... Rxc7
2. RxB ++). 2. c7xR=Bishop (If white chooses
a Queen or Rook is a stalemate since any move left to black puts
his King in check and if a Knight is chosen, the black King will
have a chance to flee). Black resigned.
In another
example of a favorable Bishop underpromotion, the following diagram
shows another case which leads to a draw for a lost game for
white:
White to move
If white moves 1. g8=Rook (or Knight), 1...Qe5 mates. If 1.
g8=Q+ Kc3 2. Qxb8 Qxb8 and black wins easily. So, the only
good move for white is to underpromote g8 to a Bishop giving
check to the black King. Now, any move for the black King to
move out of check is a stalemate for white. Or, if the black
Rook takes the white Bishop, then h7xR=Q+, QxQ+, KxQ and the
white Pawn on g2 will promote.
Thank you for visiting us,
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