Botvinnik Semi-Slav, The (Pedersen)
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MOVE-ORDERS AND VAR,OUS DEVIATIONS 89<br />
cJtxd7 is unclear according to Vilela)<br />
19 ... .th6+ 20 f4 exf4 21 cxd7+ ~b8<br />
22 'ir'h5 l:tg5! 23 .txg5 c3! 24 lbxc3<br />
(24 bxc3? b3 -+) 24 ... bxc3 25 bxc3<br />
.txg5 1/2- 1 /2 Vilela-Chekhov, Halle<br />
1981. White cannot avoid a perpetual<br />
check after, for example, 26 'ir'xg5<br />
'ir'al+ 27 ~c2'ir'a2+ 28 ~c1.<br />
b) 12 ... 'ir'aS!? (this makes some<br />
sense as in many of the normal ... 'ir'aS<br />
lines an important part of White's plan<br />
is to retreat the dark-squared bishop to<br />
e3; this is now ruled out) 13 exf6.ta6<br />
(13 ... b4!? 14 lbe4 .ta6) 14 a3 0-0-0<br />
15 .tg2lbc5 160-0 lbb3 (16 ... lbd3 17<br />
'ir'f3 .tb7 18 b4!? 'ir'c7, Magerramov<br />
Savchenko, Helsinki 1992, and now<br />
19 'ir'e3 is very good for White) 17<br />
'ir'h5'ir'c7 18l:tadllbxd4 19lbe4 c5 is<br />
unclear according to Beliavsky and<br />
Mikhalchishin.<br />
c) 12 ... .tb7 13 .tg2'ir'b6 (13 ... 'ir'c7<br />
14 exf6 0-0-0 15'ir'h5!? lbb6 16 ndl<br />
.tb4! 17 0-0 nh8 18 'ir'f3 .txc3 19<br />
bxc3 l:tdg8 20 l:tfel c5! 21 'ir'xb7+<br />
'ir'xb7 22 .txb7+ ~xb7 23 dxc5 lbd5<br />
was fine for Black in the game Komljenovic-Antunes,<br />
Saragossa 1996) 14<br />
exf60-0-0 150-0 lbe5!? 16'ir'h5lbg6<br />
17 .tg5 nh8 intending ... .th6 with at<br />
least an equal position, Mejak-Krivic,<br />
corr. 1981.<br />
A21)<br />
12.txf6<br />
This has never been considered<br />
very critical but is seen now and then if<br />
White wishes to avoid the complications<br />
of Line A22.<br />
B<br />
12 ... lbxf613 exf6 (D)<br />
13 .•. 'ir'xf6<br />
Black hurries to re-establish material<br />
equilibrium but leaving the queenside<br />
has its disadvantages. Hence,<br />
another option is 13 ... .tb7 14 .tg2<br />
and then:<br />
a) 14 ... 'ir'b6 150-00-0-016 'it'h5!<br />
l:tg6 17 lbe4 l:txd4 (this is criticized<br />
by many sources but it is difficult to<br />
see a better move; e.g., 17 ... 'ir'xd4 18<br />
l:tadl'ir'xb2 19l:txd8+ cJtxd8 20 'ir'h8<br />
'ir' a3 21 l:td 1 + cJtc 7 22 'it'h 7 l:th6 23<br />
'ir'xf7+ ~b6 24 l:td7 and White wins)<br />
18'ir'h7'ir'c7 19 h4 c5 20 l:tfel nd8 21<br />
l:tadl .td5 22lbc3 ± Korchnoi-Bellon,<br />
Las Palmas 1981.<br />
b) 14 ... 'ir'c7 (while this does not<br />
support the attack on d4, it has the advantage<br />
that f7 is protected) 15 0-0<br />
(White is not able to utilize his queen<br />
actively without giving up his d-pawn<br />
after this; 15 'it'f3 0-0-0 16 l:tdl is another<br />
possibility) 15 ... 0-0-0 16 'ilt'c2!?<br />
l:txd4 17 a4 .tc5? (Black's attack is insufficient<br />
after this; 17 ... a6 is safer,
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