With pawns a and c or f and h.
A selection of 39 games with "mistakes" analysed through 6 pieces EGTB/
http://www.jmrw.com/Chess/KRPPKR/base.htm
With pgn.
jmrw
Tantale - 01 Jan 2009 15:08 GMT
Now 119 games in the pgn
jmrw
Tantale - 02 Jan 2009 10:23 GMT
Just added :
Korchnoi,V (2620) - Gurbanzade,E (2165)
and
Kramnik,V (2795) - Aronian,L (2735)
128 games in the pgn
jmrw