|Phony Benoni: Just to follow up: here is the position after <46.Kg4>:|
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In the source cited by Winter "American Chess Bulletin", February 1905, p. 29-30, Black's move is given as <46...Ka3>. This looks ridiculous. A note by C. S Howell stated that the move excited much curiosity at the Brooklyn Chess Club. To summarize his analysis:
Black must move his king as other moves lose a pawn on the spot. It seems natural to move the king to the b-file, but:
...46...Kb5 47.Nd7 e4 48.Nf6 e3 49.Nd5 e2 50.Nc3+ winning the pawn;
.,.46...Kb4 47.Nd7 e4 48.Nf6 e3 49.Nd5+, winning the pawn
...46...Kb3 47.Nd7 e4 48.Nc5+, as is the bone of contention here.
The position was drawn in any event, but Marshall's move was the best winning attempt. As Howell stated, "All of which shows that Marshall's ...Ka3 was not so idiotic as it looked."
Correction slip to be submitted.