[blind-chess] Spoiler Alert: Tactics 101 Problem 3-1
- From: "Paul Benson" <paul.benson@xxxxxxxxxxxxxxx>
- To: <blind-chess@xxxxxxxxxxxxx>
- Date: Thu, 27 Jun 2013 14:01:53 +0100
Hello all,
Positional factors: There is a material imbalance here and a deficit for white
. White has a queen and pawn while black has a rook and 2 knights, giving black
a nominal advantage of 1 pawn
.
White: There is a potentially powerful passed pawn on d6, which black must keep
under control as the game proceeds into an endgame. The white bishop on a1 is
unchallengeable by a dark square black bishop, as that black piece has departed
from the game. This white bishop, despite the apparent passive location of a1,
is therefore potentially very powerful. The white b4 pawn is unprotected and
attacked by the black d5 knight
.
Black: The kingside pawns have expanded making them a potential point of attack
much later in the game. The black rook on c8 has control of the c-file, and if
given time, black will double rooks on the c-file and seek to invade the white
queenside. The a7 knight is unprotected, the d5 knight is excellently placed as
it sits on a central light square, which can only be removed if white is
willing to give up a rook to remove it. The d7 bishop has no light square white
counterpart to challenge it, and therefore has great potential to control the
light squares as the game proceeds. It is however presently occupied with the
task of blockading the white passed d6 pawn, reducing the influence of this
bishop on the game
.
How white wins material: White utilises 2 tactical tools with 1 move, taking
full advantage of 2 weaknesses in the black position. White plays, 1. Qd4,
creating 2 threats at once, known as a fork. The queen and bishop have also
created a battery, that is 2 pieces with a common power reinforcing each other,
down the long dark square diagonal, threatening checkmate on either, g7, or,
h8. The white queen has also threatened the unprotected knight on a7, so white
has 2 threats for black to prevent. As it happens, there is no single black
move which will stop both white threats. Black must prevent the more important
threat of mate, and the only sensible move to block the long diagonal is, 1.
... f6. White is not overly worried about having the mate threat nullified, as
simply, 2. Qxa7, wins a piece
.
There is still much play in the position, but black is now a nominal 2 pawns
down, as white has queen and pawn for the black rook and knight.
Furthermore,the presence of opposite square-colour bishops will assist whoever
is attacking, as that attacking bishop is not easy to challenge. Lastly, when
one player has a queen for either 2 rooks or rook and minor piece, then pawn
structure for the player without the queen become very important. A centralised
queen can attack in 8 directions at any one time, which means any weaknesses in
the opponent pawn structure will be potential targets for the queen. Sooner or
later, as more pieces are exchanged off, the remaining black pieces will find
it difficult to both defend pawn weaknesses and themselves, as the white queen
probes the black defences, until a pawn or more is lost
.
Condensed solution: 1. Qd4 f6 2. Qxa7
.
Conclusion: Black had 2 weaknesses, the unprotected a7 knight, and the long
dark square a1-h8 diagonal. The centralising white move, 1. Qd4, demonstrates
the power of a queen, creating 2 threats on opposite sides of the board, that
is the a7 and g7 squares. The distant weaknesses might seem totally
unconnected, but weaknesses, however far apart, can not be assumed to be
unrelated, especially when an opposing queen is still present
.
Paul Benson.
-----Original Message-----
From: R Dinger - Email Address: rrdinger@xxxxxxxxxx
Sent On: 31/05/2013 19:13
Sent To: chess - Email Address: blind-chess@xxxxxxxxxxxxx
Subject: [blind-chess] Tactics 101 Problem 3-1
Hello Puzzlers,
Here is a tactics problem to study. What sort of tactic is available and how
can White win a piece?
White to move
FEN:
2r2rk1/
n2b1p2/
p2Pp2p/
3n2p1/
1P6/
8/
P4PPP/
B2QR1K1
w - - 0 1
Short Algebraic Problem Setup:
White: Kg1, Qd1, Re1, Ba1, Pa2, Pb4, Pd6, Pf2, Pg2, Ph2
Black: Kg8, Rc8, Rf8, Bd7, Na7, Nd5, Pa6, Pe6, Pf7, Pg5, Ph6
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