Thread: White 19
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Old 2014-01-25, 16:48   #3
cheesehead
 
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"Richard B. Woods"
Aug 2002
Wisconsin USA

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BTW, our deadline is [URL="http://mersenneforum.org/showpost.php?p=365332&postcount=123"]Feb. 1, 0700 GMT[/URL]

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I'm fairly sure we're going to win a(t least a) pawn by force!

[B]19 Nd2[/B]

If Black doesn't immediately protect the c4-pawn OR castle (e.g. 19 ... Nd5) then 20 Nxc4 Ba6 (to pin the N/c4 against R/f1) 21 Nd6+ K-moves 22 Rxf7 (not 22 Nxf7? Bxf1)

If 19 ... O-O 20 Rf2 (not 20 Nxc4 Ba6) Ba6 21 Bf1 and Black has no way to defend c4 a second time.
E.g., 21 ... Nd5 22 Nxc4
Then we may have quite a fight: e.g. 22 ... Bxc4 23 Bxc4 bxc3 24 bxc3 Rb7 25 Bxd5 (not 25 Rb2 Rxb2 26 Nxb2 Nxe3) exd5 26 Rb2 Rxb2 27 Nxb2 Rb8 28 Nc4 Rb3 29 Bd2 Ne7 30 Kf2 Nd5 31 Rc1 Bf8 32 Ke2 Ba3 33 Rc2 and so on ...
Or 22 ... Nxe3 23 N1xe3 Bxc4 24 Nxc4 bxc3 25 bxc3 and Black can't win control of the b-file (If 25 ... Rb7 26 Rb2 Rfb8 27 R1b1)

If 19 ... Ba6 20 Ne4 O-O 21 Nc5 Ra8 (21 ... Bc8 22 Rf2 Nd5 23 Bf1 Nb6 24 Bg2 Ne7 25 Bd2 Nd7 26 Ne4 Nb6 27 Ne3 and it's likely that some combination with Bf1 and Nd6 will win the c4-pawn. [I]Of course, this remains to be carefully analyzed.
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Last fiddled with by cheesehead on 2014-01-25 at 16:54
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