I tried something with 1.Qg7+ Bxg7 2.Bxg7+ Kg8 3.Bf6+ Kf8 4.Bxd8 and here I had imagined rook on e2, bishop on f6 , rook on g7 to takes h7 but before think if there is tempi to do it, simply 4…Ke8 is advantageous for black. If ..Rc8 is better or not I didnt evaluate, could be interesting.
1. Bg7+! Kg8 2. Bxf6+!Rxg4 3. Rxg4+ Kf8 4. Bxd8 and white is an exchange up (he was a piece down to start with)now with a strong mating Eg.4…. Rd7 5. Bf6 Nxd3 6. Rg7!followed by 7. Rxh7 and 8. Rh8#
In my first post, I had missed Rxg4, bad miss. Correct seems to be:
1. Bg7+ Kg8 2. Bxf6+ Rxg4 3. Rxg4+ Kf8 4. Bxd8 Up with exchange, and as Harry mentioned, there is some ongoing attack still. I expect Rc8 instead of Rd7, but white should be clearly better here, e.g.:
4. … Rc8 (Rd7 blocks a white field for king and looks impossible) 5. Bf6 Nxd3 (planning Ne5 to meet the trapping Re1 with) 6. Rd4! Ne5 7. Rxd6 Ke6 8. Rfd1! In this line black looks dead. There are many other lines, but black shall be in trouble in all of them I think, at least have to sack some material to escape the mate.
H6-g7
1.Bg7+ Kg8
2.Qxd4! Bxd4
3.Bf6+ Kf8
4.Bxd8
winning exchange!
Sorry, in my last post the line shows rook vs bishop & knight at final position. Thinking bit more I found
1.Bg7+ Kg8
2.Bxf6+ Rxg4
3.Rxg4+ Kf8
4.Bxd8
and now we actually have got the exchange
I tried something with
1.Qg7+ Bxg7
2.Bxg7+ Kg8
3.Bf6+ Kf8
4.Bxd8 and here I had imagined rook on e2, bishop on f6 , rook on g7 to takes h7 but before think if there is tempi to do it, simply 4…Ke8 is advantageous for black. If ..Rc8 is better or not I didnt evaluate, could be interesting.
1. Bg7+! Kg8
2. Bxf6+!Rxg4
3. Rxg4+ Kf8
4. Bxd8 and white is an exchange up (he was a piece down to start with)now with a strong mating
Eg.4…. Rd7
5. Bf6 Nxd3
6. Rg7!followed by
7. Rxh7 and
8. Rh8#
Harry
1. Bg7+ Kg8 (1. … Bxg7 2. Qxg7#) 2. Bxf6+ Rxg4 3. Rxg4+ Kf8 4. Bxd8 gives white a quality (rook vs bishop).
1. Qg7+ Bxg7
2. Bxg7+ Kg8
3. Bf6+ Kf8
4. Bxe8
Dg7+ and forced mate in 5
Draw seems easy, how to win?
1. Qg7+!! Bxg7
2. Bxg7+ Kg8
3. Bh6+ Kh8
4. Bg7+ 1/2-1/2
very difficult
1. Bg7+ Kg8 (Bxg7? Qxg7#)
2. Bxf6+ Kf8
And now, Bxd8 is very tempting and certainly winning, but even better seems:
3. Qg7+ Ke8
4. Qg8+ Kd7
5. Qxd8#
All enforced.
Ow, wait…
1.Qg7+ Bxg7
2.Bxg7+ Kg8
3.Bf6+ Kf8
4.Bxd8
a)
4…Ke8
5.Rg8+ Kd7
6.Re1
(6.Bf6 Rc8
7.Rxc8 and white get the exchange)
6…Ne4
7.Bxc7 anyway white gets the exchange
b)
4…Rc8
5.Bf6 Rxd3 and if white plays Re1 then a simple Ne4 solve defense problems for any threat mate, I mean, if had tempi, Rg3-g7-h7
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1. Bg7+ Kg8
2. Bxf6+ Bf6
3. Qg8#
1. Bg7+ Kg8 (Bg7 2. Qg7#)
2. Bf6+ Rg4 (Kf8 3. Qg8#)
3. Rg4+ Kf8
4. Bd8
White is an exchange up.
In my first post, I had missed Rxg4, bad miss.
Correct seems to be:
1. Bg7+ Kg8
2. Bxf6+ Rxg4
3. Rxg4+ Kf8
4. Bxd8
Up with exchange, and as Harry mentioned, there is some ongoing attack still. I expect Rc8 instead of Rd7, but white should be clearly better here, e.g.:
4. … Rc8 (Rd7 blocks a white field for king and looks impossible)
5. Bf6 Nxd3 (planning Ne5 to meet the trapping Re1 with)
6. Rd4! Ne5
7. Rxd6 Ke6
8. Rfd1!
In this line black looks dead. There are many other lines, but black shall be in trouble in all of them I think, at least have to sack some material to escape the mate.