00:00also quite useful example very few pieces left but I think it's quite
00:06instructional let's have a look at this position why it has material advantage
00:19it has you may say extra piece because Queen is roughly equal to two rooks but
00:26white has an extra bishop but the problem is that this bishop is pinned and it's
00:31the is an absolute pin because it's king there and blacks preparing to go rook c1
00:36just to have second rook attacking this bishop and by the way it is
00:41potentially there will be another attack with with from there but no matter what
00:45you know if black rook shows on c1 it's an exchange on f1 black recovers the
00:52piece and it's at best for white will be draw
00:55technically white can go c6 by trying to bring the for instance bishop six
01:02bishop e3 trying to bring bishop back to protect c1 square but then black can go
01:10rook b4 and then rook shows on b1 and this was it was with the same effect so
01:17there's no way white can white can win so what we can we can do so is any way we
01:25can eliminate this pin and to sort of shoot back to use the fact that we have a
01:35queen we have couple of bishops and the trick is that if you look at these
01:41diagonal so you find out that king is open so that's why if this bishop can become
01:50free from this deadly pin absolute pin it could cause a lot of damage and by just
01:56making this calculation in your mind you can find a move
02:03you
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