Skype coaching session, 04 September 2016.

Please note: Re-structuring of the sessions now offers the option for guests 
to bring their own games for group discussion.

Recordings of some previous coaching sessions can be found at:

http://www.open-aurec.com/Skype/PaulBenson/PaulBenson.htm

The following were examined:
Middlegame tactic problem.
How to checkmate with king and rook against king.
King and rook with a rook-file pawn against king and rook - Defender has 
draw available.
King and rook with a knight-file pawn against king and rook - Defender has 
draw available.

Paul Benson.

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Middlegame tactic problem.

Black to play.
White: Kg1, Qe3, Bb1, Be1, Nc4, Pa2, Pb4, Pf5, Pg2, Ph2.
Black: Kg8, Qe7, Bb7, Bg7, Nd7, Pa6, Pb6, Pf7, Pg6, Ph7.

Solution.
Black plays, 1. ... Bd4, pinning the white queen to the king. If, 2. Qxd4 
Qxe1+, is mate.

Tactical tools and warnings.
X-ray attack - The black queen is x-raying the white e1 bishop through the 
white e3 queen.
Pin - The black bishop moves to d4, pinning the white queen to her king.
Deflection - The white queen is deflected from the e-file permitting the 
black queen to capture the white e1 bishop.
Diagonal vulnerability - The white king and queen are sitting on a diagonal 
of the colour of the black g7 bishop.
Back rank weakness - The white king on g1 is vulnerable to a checkmate 
pattern of the black queen landing on the e1 square.

*  *  *

## How to checkmate with king and rook against king.

The method of winning files or ranks by gaining the opposition over the lone 
king is demonstrated.

*  *  *

## King and rook with a rook-file pawn against king and rook - Defender has 
draw available.

The defending king must sit on the promotion square and the defending rook 
stays on the defending back rank.

*  *  *

## King and rook with a knight-file pawn against king and rook - Defender 
has draw available.

The defending king must sit on the promotion square and the defending rook 
stays on the defending back rank.

*  *  *