The Ashburnham summer series
It was a ten-game G7+3 series, during http://city.st-helens.org.uk/meet/the-city-summer-school - my opponent was Mark Jackson, Oxford University chess captain - http://www.ecfgrading.org.uk/?ref=284379B
I had just re-read a book of the Short-Kasparov match and this felt similar - a bit. We alternated black and white and found that we both played the Centre-Counter and the Benko - but I knew less, or at least so it seemed.
Going into the final game I was 7-2 down and my Centre-Counter had been comprehensively demolished by my stronger opponent. So for the final game I switched to the Petroff - the first opening I learnt... and I was strategically lost after ten moves.