35...a6 36.Kf3 Rc8 37.Bd4 b5 38.Bd3 Rc1 39.fxg6+ fxg6 40.h4 Rd1 41.Ke2 Rh1 42.h5 Rh2+ 43.Bf2 Kg7 44.hxg6 h5 45.gxh5 Rxh5 46.Bd4+ Kg8 47.Be4 a5 48.Kf3
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Gawain Jones 2648 Levan Pantsulaia 2595 Warsaw Ech tt 2013 Black to move
The Bg3 is the only piece defending the king. If it is lost, White risks being mated. This is what happens after...
In the game, Black chose the waiting move 55...Kh8, and after 56.Nf6 Qxe1 57.Bxe1, the position equalised out.
The bishops fire over the whole board, whilst the queen is ready to land a deadly blow from either side.
He can only avoid mate on g2 with the help of the queen, but it is tied to the defence of the knight.
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Gudmundur Sigurjonsson Leonid Stein Reykjavik 1972 Black to move
White has not yet completed his development, and in the absence of the light-squared bishop, his pawn structure looks rickety.
This is the basis of Black’s whole idea. If he had to retreat the knight, White would entrench his knight on d4 and obtain the advantage, as the Bb7 would be too bad.