Botvinnik Semi-Slav, The (Pedersen)
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16 ... 'iia6 AND 16 ... 'iid6 41<br />
a) 2S.::tel? tiJxcl 26 'ii'xc4+ 'ii'c7!<br />
27 'ii'xcl (27 'ii'a6+ 'ittd8! 28 ..tf4 eS<br />
-+) 27 ... 'ii'xcl+ 28 i.xel as! + Lutz<br />
Piket, Cologne TV Cup 1994.<br />
b) 2S .::tdl?! 'ii'b2! 26 'ii'xb2 (26<br />
'ii'e3 'ii'xb3 27 .::tal tiJeS! 28 tiJd2<br />
'ii'xe3 29 ..txe3 b3 30 ':ha7 ..tb4!! and<br />
Black is winning, Rogozenko-Tella,<br />
Cappelle la Grande 1998) 26 ... tiJxb2<br />
27 .::tcl c3 28 tiJxc3 tiJd3! 29 .::tc2 tiJel<br />
30 .::tel tiJd3! =.<br />
c) 2S ..tf4!? (best, I think) 2S ... tiJxf4<br />
(2S ... 'ii'hS is met by 26 g4! .::tg8 27 f3,<br />
when White again obtains an attack<br />
after 27 ... tiJxf4 28 'ii'xc4+ ~b8 29<br />
.::tcl since after 29 ... .::txg4+ 30 'it'hl<br />
.::tgl+ 31 ~xgl tiJh3+ 32 'it'fl! 'ii'xf3+<br />
33 ~el 'ii'hl + 34 'it'e2 'iixh2+ 3S 'it'dl<br />
White's king escapes to the queenside)<br />
26 'ii'xc4+ ~b8 27 gxf4 'ii'hS 28<br />
.::tel with a strong attack for White; for<br />
example, 28 ... 'ii'xh2+ 29 'it'fl 'ii'hl + 30<br />
'it'e2 'ii'hS+ 31 'it'e3 and White should<br />
win.<br />
22 tiJxd5 'iWxd5 23 f3 tiJd3<br />
23 ... ..tcS+ 24 ~g2 tiJd3 2S h4 'it'b7<br />
26 .::ta5! 'ii'd4 (26 ... .::td8!?) 27 b3! was<br />
slightly problematic for Black in<br />
Ivanchuk-Shirov, Novgorod 1994.<br />
24 h4 b3! 25 'it'g2 ~b7 26 l:ta4<br />
..tb4 27 ..td2 ..tc5 28 ..te3 .::tg8<br />
Black has good compensation, Khalifman-Ivanchuk,<br />
Elista 1998.<br />
82)<br />
17 dxe6! 'iWxe6<br />
Unfortunately this is virtually forced<br />
since 17 ... ..txg2, which would be the<br />
usual reply with the queen on bS, can<br />
here be met by 18 e7 ..txfl (18 ... 'ii'e6<br />
runs into 19 tiJxcs, or even 19 exd8'iW+<br />
'it'xd8 20 ~xg2 'ii'h3+ 21 'it'f3, when<br />
the white king escapes) 19 tiJxcS! (see<br />
the point?) 19 ... 'iWc6 20 exd8'ii'+ 'it'xd8<br />
21 'ii'xd7+ 'ii'xd7 22 tiJxd7 ~xd7 23<br />
.::txfl. I find it hard to believe that this<br />
should not be very good for White, but<br />
here is how the game Zarkov-Shabalov,<br />
Boston Harvard Cup 1994 continued:<br />
23 ... ~c6 24 .::tel 'it'bS 2S h4<br />
(2S ..te3! looks more accurate, with<br />
the idea that 2S ... a5 is met by 26 .::tdl!)<br />
2S ... aS 26 ~g2 a4 27 ~f3 ..tcS 28<br />
.l:te 1 ..td4 29 .::te2 b3 30 axb3 cxb3 and<br />
Black's queenside pawns have become<br />
very menacing.<br />
17 ... tiJeS? would be another try, but<br />
fails to 18 'iVxd8+! 'iti>xd8 19 e7+ ..txe7<br />
20 fxe7+ 'iti>e8 21 tiJxcs 'iWg6 22 tiJxb7<br />
'ii'xgS 23 f4 'ii'h6 24 fxeS and White<br />
wins.<br />
18 .::tel (D)<br />
B<br />
18 ... tiJe5<br />
This involves a rook sacrifice but<br />
appears to be Black's best chance to
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