The British Chess Magazine 549 only scores a point.
12 … �c5
XIIIIIIIIY 9r + lwq-trk + 0 9 + p +-vlpzpp0 9-snpzp- +- + 0 9zp-sn- +- +-0 9P +-sNP +- + 0 9 + LsN-vL- + P0 9-zPP +-zPP + 0 9tR- + QtR-mK-0 xiiiiiiiiy Black’ s plan to neutralise the bishop on b3 is clear, but has taken some time.
13 �f3!
6 points. White aims for a kingside attack, not fearing the loss of the bishop.
13 �a2 �b × a4 14 � × a4 � × a4 15 � × f7 + � × f7 16 � × a4 �f6 is good for Black and therefore only scores a point.
13 … � × b3
14 c × b3!
4 points for this unusual recapture, which does not allow the black knight into c4. 14 � × b3 �c4 is good for Black and only merits a point.
14 … �e6
14 … �f6 15 �ad1 is the critical line, when White is only slightly better.
15 �ad1!
3 points for this fine positional move aiming at the Black pawn on d6. 15 � × e6 f × e6 16 �g4 e5 is good for Black because of his strong pawn centre and only scores a point.
15 … �d7
Black aims to put this knight on c5. 15 … �c8 is a more passive alternative.
16 �g3! 4 points. White has a slow but powerful plan of f4. 16 … �e5
Not 16 … �h4? when 17 � × d6 is winning. 17 �e2
4 points for this simple preparatory move. Not 17 f4? since 17 … �h4 wins the exchange.
17 … �g6
18 f4!
4 points. White has the threat of f5, winning material.
18 … c5 18 … �h4 is well met by 19 �h2. 19 �f5!!
6 points for this clever pawn sacrifice. 19 � × e6 f × e6 20 �g4 �d7( 20 … �c8 is only slightly better for White) 21 e5 is awkward for Black and scores 3 points.
19 … � × b3
20 �dd2
2 points for this move, retaining pressure against the pawn on d6.
20 … �c8
21 �f2
4 points for this mysterious rook move protecting f3. The immediate 21 h4 � × h4 22 � × h4 � × h4 23 � × h4 � × h4 24 f5 d5 25 �g5 d4 26 �d1 � × f5 27 e × f5 f6 28 �f4 �fe8 29 � × e8 + � × e8 30 �f2 � × a4 gives a position where Black has good compensation for the piece.
21 … �h8 22 h4!!
6 points; White has prepared this dangerous thrust aiming to blast open Black’ s kingside.
22 … �g8
After 22 … � × h4 23 � × h4 � × h4 24 � × h4 � × h4 25 f5 f6 26 g3 � × f5 27 � × f5 White’ s extra piece outweighs the Black pawns.
23 h5 3 points, driving the black pieces to the back