George Duke wrote on Tue, Sep 25, 2012 06:31 PM UTC:
The World's '17 ...Na6' is no good and just leads to loss of the Pawn at
http://www.chessvariants.org/index/displaycomment.php?commentid=29478, Carlsen versus the World online two years ago. But further along, given being down that Pawn to White, Black is about even upon 20 f3..., and '20 ...Bc8' is where Black goes wrong. Instead, 20 ...Qc8, and White Queen, unable to be protected, has immediately to trade Queens or retreat herself to the d3 or e2. Then rather than a wasted 21 ...f5, the World has a lot of piece power port-side to nibble back the Pawn lost or still more value -- without Rook being hemmed in. At the really played 20 f3..., Carlsen-White pieces and pawns attack only 8 central 16 squares, versus Black's attacking 13 times those sixteen; so down a Pawn, Black might actually be ahead and just needs the better Move 20 ...Qc8 than what they came up with overnight '20 ...Bc8' -- where World-Black went wrong. Probably most 'Whites' would elect to trade the Queens and after 21 ...Bxc8, The World-Black keeps better position. After the prospective 20 ...Qc8 21 QxQ Bxc8, Black now leads in central-sixteen attacks 12 to 4.
