lichess.org/training/62849 I did Qfx5 and is a failed problem why?
Many problems are rly bad
Many problems are rly bad
SPOILER ALERT! (If it wasn't obvious enough)
The main reason why Qxf5 fails in this instance, is because Black can then reply with Re3, eventually killing White's advantage of having a rook over a bishop (for instance, Qxf7+ Kh7 Qf5+ Kh8 Rd8+ Qxd8 Kxh2 Rxc3 and now both sides are dead equal in material). Qxe8, however, inevitably allows the capture of both rooks, meaning that White has a 7-point advantage (assuming the standard metric that a bishop is 3 points and a rook is 5).
The main reason why Qxf5 fails in this instance, is because Black can then reply with Re3, eventually killing White's advantage of having a rook over a bishop (for instance, Qxf7+ Kh7 Qf5+ Kh8 Rd8+ Qxd8 Kxh2 Rxc3 and now both sides are dead equal in material). Qxe8, however, inevitably allows the capture of both rooks, meaning that White has a 7-point advantage (assuming the standard metric that a bishop is 3 points and a rook is 5).
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