Botvinnik Semi-Slav, The (Pedersen)

BLACK'S 13TH MOVE ALTERNATNES 59
A)
13 ... ltJb6 14 dxe6!
This is the stunning move that
makes White's whole concept with 11
exf6 instead of 11 g3 playable. If Black
were allowed to capture on d5 he
would be better, for example after 14
.tg2liJxd5.
14 ... .txhl
It is clear that Black has to accept
the rook in one way or another but he
could also choose to throw in an exchange
ond1. For example, 14 ... 'iIi'xdl+
15 ':'xdl .txhl (15 .. .fxe6 16 ':'gl a6
17 h4 ±) 16 e7 (D) and now rather than
attempting to rescue his dark-squared
bishop, Black should restrain White's
knight from jumping forward:
B
a) 16 ... .th6? loses immediately to
17 ltJxb5 ltJd5 (17 ... .:.c8 18 ltJc7+
':'xc7 19 ':d8#) 18 .th3 ltJxe7 19
ltJc7+ ~f8 20 ':'d8+ ':'xd8 21 fxe7+
~g7 22 exd8'i1i' ':xd8 23 .txd8.
b) 16 ... .tc6 17 l:.d6 b4 (17 ... .:.c8
18 h4! .th6 19 f4 b4 20 .th3l:tb8 21
':'xc6 bxc3 22 bxc3 wins for White
since Black will be able to free his imprisoned
rook on h8) 18 ':'xc6 bxc3 19
':'xb6 axb6 20 .txc4 ~d7 21 bxc3
.th6 22 h4 .txg5 23 hxg5 is analysed
by Burgess in The Mammoth Book of
the World's Greatest Chess Games,
and forms an incredible ending. White
only has a bishop and four pawns for
two rooks but the far-advanced pawns
provide more than enough compensation.
The threat is 24 .txf7, and if
23 ....:.h7, 24 .tb5+ ~e6 25 e8'i1i'+
':'xe8 26 .txe8 is very good for White.
c) 16 ... a6 and then:
cl) 17 exf8'ii'+?! ~xf8 18 .te3
l:th5 19 ':d6 l:.b8 20 .te2 l:.e5 21ltJd 1
~g8 22 .tf4 l:.ee8 23 ltJe3 .te4! with
slightly the better chances for Black,
Beliavsky-Bagirov, Moscow tt 1981.
c2) 17 h4! (this truly amazing idea
is designed to lock in the rook on h8)
17 ....th6 18 f4! (this is the real point;
if Black exchanges on g5, White can
take back with the f-pawn and the h8-
rook will never get out) 18 ... b4 19
':'d6! (only this energetic follow-up
justifies White's idea) 19 ... l:.b8 20
ltJdl .txg5 21 fxg5 ltJd5 22 .txc4
ltJxe7 23 fxe7