Error in Cecil Purdy's Analysis II
07 Sep '21 14:43The book "How Purdy Won," starting on page 34, gives Purdy's notes to his game against F. A. Crowl (Black) from the inaugural Correspondence Championship of Australia, which started in 1937. The game began as given below.
Purdy writes, "If 7...d6 then 8. d5 with advantage."
However, Black can meet 8. d5 by 8...exd5 9. exd5 Ng4! (threatening 10...Ne5 followed by 11...Bf5 and 12...Nd3+). For example, 10. Bf4 (to exchange the knight if it should reach e5, at the cost of ceding the two bishops and further weakening White's dark squares) 10...Qf6 11. Bg3 Bf5 gives Black a great edge in mobility and the potential of exploiting White's hole at b3 (such as by posting a knight there).
This sequence (starting with 7. e4) is depicted below.
The game actually continued 7...e5 8. dxe5 Ng4 9. Ng3 Qh4 10. Be2 d6 11. Nb5 Na6 12. exd6 cxd6 13. Qc2, with a sharp game that White eventually won. (See below for the game up to this point.)
Purdy writes, "If 7...d6 then 8. d5 with advantage."
However, Black can meet 8. d5 by 8...exd5 9. exd5 Ng4! (threatening 10...Ne5 followed by 11...Bf5 and 12...Nd3+). For example, 10. Bf4 (to exchange the knight if it should reach e5, at the cost of ceding the two bishops and further weakening White's dark squares) 10...Qf6 11. Bg3 Bf5 gives Black a great edge in mobility and the potential of exploiting White's hole at b3 (such as by posting a knight there).
This sequence (starting with 7. e4) is depicted below.
The game actually continued 7...e5 8. dxe5 Ng4 9. Ng3 Qh4 10. Be2 d6 11. Nb5 Na6 12. exd6 cxd6 13. Qc2, with a sharp game that White eventually won. (See below for the game up to this point.)