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1.Bxc6! + – If 1…Rxc6 2.Qe4 (–> 3.Qxc6 and 4.Rxd8) 2…Re6 (2…Qc7 3.Qxc6) 3.Qa8+ Qe8 4.Rd8 etc.
Immediately, the knight seems to hang somehow, Bxc6 looks good. It took me some time to find out why, but it had to be about creating a threat of Rd8#:
1. Bxc6 Rxc6 (Re1+ just gives up the piece)
2. Qe4!!
Situations with both queens hanging are allways fun!
Black can’t take because of Rd8#.
2. … Qf8 (only move preventing both Rd8# and Qe8#)
3. Qxc6
is up with a rook.
I forgot to mention the line:
1. Bxc6 Rxc6 (? this looses rook)
2. Qe4!! Re6 (?? this looses queen)
3. Qa8+ Qf8
4. Rd8 Re8 (?? this looses both queen and rook)
5. Rxe8 Qxe8 (?? this looses king instead)
6. Qxe8#
qh4?
Bc6 Rc6
Qe4 Re6
Qa8 Qf8
Rd8 Re8
Re8
White wins a piece with 1.Bxc6, because if 1…Rxc6 then 2.Qe4! and black cannot avoid further losses.
1Bxn rxn 2 Qe4 re6 3Qa8 qf8 4Rd8 re8
5Rxr wins
1. BxN RxB 2. Q-K4!
White can make use of Black’s weak back rank and win material:
1. Bxc6 Rxc6 or concede the piece.
2. Qe4!! attacking both queen and rook.
The black queen cannot just protect the rook, since after 3.Qxc6 Qxc6 4.Rd8 it will be mate.
2. … Re6
2. … Qxe4
3. Rd8+ and mate
2. … Rc7
3. Qxe7 Rxe7
4. Rd8+ and mate
3. Qa8+! Qf8
4. Rd8 and the black queen is lost.
For once, the most obvious move is the right beginning. However, the key move in the critical line is not obvious, and took me some time to actually work out, though it did occur to me almost immediately:
1. Bc6! Rc6?
2. Qe4!!
Now, black obviously can’t take at e4 without allowing the back rank mate. Also, black cannot move the queen to protect the rook-[2. …Qe6 3.Qc6! Qc6 4.Rd8+-]- nor move the rook to c7 to protect the queen- [2. …Rc7 3.Qe7 Re7 4.Rd8+-]. Less obvious is what happens after black plays Re6, but then white can win black’s queen for the rook by checking from a8: [2. …Re6 3.Qa8! Qe8 4.Rd8 Kf8 5.Re8 Re8 5.Qa7+-]. So, black must concede the rook, but is completely lost.
At move 1, black must simply concede the knight by making a move like Re1+, or play g6 to give his king a hole.
1. Bxc6 Rxc6
2. Qe4
2. … Qxe4
3. Rd8+ Qe8
4. Rxe8#
2. … Re6
3. Qa8+ Qe8
4. Rd8
5. Rxe8
1Bxc6 Rxc6(1… h6 making space for K loses N)
2Qe4 Re6
2…. Qf8 3QxRc6
2… Qc7 or Qf6 33qe8#
3Qa8 Qe8 or Qf8
4Rd8 wins.
I would venture 1. Bxc6 Rxc6 2. Qe4 Re6 3. Qa8+ Qe8 (or Qf8) 4. Rd8 and White wins.
1.Bxc6 Rxc6 2.Qe4 Re6 3.Qa8+ Qe8 4.Rd8 and white wins!