Fighting like Kilkenny cats
The strike
27...Bxg2 leaves the black queen en prise on c7, but rips open the g-file for a discovered check. The line
28.Qxc7 Bf3+ 29.Bg2 Rxg2+ 30.Kf1 Rxh2 ...
A) ... leads to a winning mate attack for Black;
B) ... is enough for a perpetual check;
C) ... allows White a countertrick to keep the advantage.
Solution
