Jean Delva vs Andrew Soltis (1980)

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Jean Delva vs Andrew Soltis
Canadian Open (1980), Ottawa CAN, rd 8, Jul-25
Modern Defense, Averbakh System (A42) · 0-1

ANALYSIS [x]

FEN COPIED

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Jun-06-24		perfidious: Soltis covered this ending in <Chess Life>.

Jun-06-24		GrahamClayton: Apparently it takes on average 70 moves by the player with the two bishops to force checkmate once this ending occurs, assuming that the knight stays on the board.

Jun-07-24		Granny O Doul: I remember reading in that Chess Life article that the toughest defense is to place the knight on g2-g7-b2-b7, and once this fortress is broken down, to run and set it up in the next corner (of course, computers eventually proved that the side with the bishops can thwart this). Jennifer Shahade had the inferior side at, I think, the Bled 2000 Olympiad. Unfortunately her Chess Life knowledge did not extend back that far, or she would probably have held out long enough for the 50-move rule to come to the rescue. Have never had to play either side, myself.

Jun-07-24		FM David H. Levin: When I was regularly attending the Westfield (NJ, USA) Chess Club in the late 1970s and early 1980s, Ken Thompson often brought Belle (Computer). He had Belle exhaustively analyze several theoretical endings, including K+B+B v. K+N and K+Q v. K+R. Later, an example of best play in the former ending appeared in a chess magazine that I think was called "e.g.", where the writer described the play as baffling. (I'll have to look for the article and will advise if I find it.)

Jun-09-24		FM David H. Levin: I found a hard copy of the aforementioned article that appeared in the chess magazine EG, Number 74 (November 1983). K+B+B v. K+N is discussed at the beginning of the issue. That issue and all others up to 2012 can be downloaded at https://www.arves.org/arves/index.p... .

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