1.Bg5!!.Rxc7. 2.Bf6+!.Kh2. 3.Rh3+!. >A-3…..Kg6.4.Bh5+!.Kh2.5.Bf7#!! >A-3…..Kg8.4.Rh8+.Kf2.5.Bh5#! The above shows the precarious position the BK is in. He is within a mating net which can be quickly cast.
Returning the R by 2…..Rg7 does not help due to.a simple 3.Bxg7! Or even 3.Rxg7 and black will have to give away his R to avoid mate.
Refusing the sac by 1….Rf8 loses quickly due to 2.Bf6+.Rxf6.3.Rc8+.Rf8.4.Rxf8#
Running away by 1…..Rh1+. Loses to 2.Kf2! (Threatening mate next move by Bf6.)..Rf8.3.Bf6.Rxf6.4.exf6. And white will get a new Q too apart from other minor pieces!
Obviously, the threat is Bf6 followed by mate. It is late, and I don’t want to look at the other options for black, but I can’t imagine they are better than just taking the rook at c7:
1. ……Rc7 2. Bf6 Rg7
It is a quick mate if black doesn’t block the check: [2. …Kh7 3.Rh3 Kg6 (or 3. …Kg8 4.Rh8 Kf7 5.Bh5#) 4.Bh5 Kh6/h7 5.Bf7#]. Continuing:
3. Bg7
I think white will win with Rg7 here, too, but I can’t quite find a mate in it in a cursory examination since black can give up the exchange at f6 by playing the rook to f8 at move 3. By playing Bg7, white sets up a similar threat in the variation above where black didn’t block the check with the rook. Continuing:
3. ……Kh7 (Kg8 4.Bf6 will win too) 4. Bf6
And white is again threatening Rh3 followed by Bh5 or Rh8 and Bh5 as seen above. I don’t see any defense here other than some delaying sacrifices like Bd1 or Rh8.
Today the comments are declared early.I had stored my findings in a text file in the morning to post in the evening.Any way the comments tally with my findings.However in the variation given by Harry 1.Bg5 Rh1+ 2.Kf2 Rf8 3.Bf6+ Rxf6 4.exf6 one need wait for the new Q.Mate is in the corner by Rc8+,Rg7+ and Rh8+.It can be delayed by inserting b at e8.
Rg g7?
Rg g7?
Rh3?
Rh3?
1.Bg5!!.Rxc7.
2.Bf6+!.Kh2.
3.Rh3+!.
>A-3…..Kg6.4.Bh5+!.Kh2.5.Bf7#!!
>A-3…..Kg8.4.Rh8+.Kf2.5.Bh5#!
The above shows the precarious position the BK is in. He is within a mating net which can be quickly cast.
Returning the R by 2…..Rg7 does not help due to.a simple 3.Bxg7! Or even 3.Rxg7 and black will have to give away his R to avoid mate.
Refusing the sac by 1….Rf8 loses quickly due to 2.Bf6+.Rxf6.3.Rc8+.Rf8.4.Rxf8#
Running away by 1…..Rh1+. Loses to 2.Kf2! (Threatening mate next move by Bf6.)..Rf8.3.Bf6.Rxf6.4.exf6. And white will get a new Q too apart from other minor pieces!
1. Bg5 looks very promising
I think Bg5 will win this:
1. Bg5
Obviously, the threat is Bf6 followed by mate. It is late, and I don’t want to look at the other options for black, but I can’t imagine they are better than just taking the rook at c7:
1. ……Rc7
2. Bf6 Rg7
It is a quick mate if black doesn’t block the check: [2. …Kh7 3.Rh3 Kg6 (or 3. …Kg8 4.Rh8 Kf7 5.Bh5#) 4.Bh5 Kh6/h7 5.Bf7#]. Continuing:
3. Bg7
I think white will win with Rg7 here, too, but I can’t quite find a mate in it in a cursory examination since black can give up the exchange at f6 by playing the rook to f8 at move 3. By playing Bg7, white sets up a similar threat in the variation above where black didn’t block the check with the rook. Continuing:
3. ……Kh7 (Kg8 4.Bf6 will win too)
4. Bf6
And white is again threatening Rh3 followed by Bh5 or Rh8 and Bh5 as seen above. I don’t see any defense here other than some delaying sacrifices like Bd1 or Rh8.
1. Bg5 wins. For example 1. … Rxc7 2. Bf6+ Kh7 3. Rh3+ Kg6 4. Bh5+ Kh7 5. Bf7#
Today the comments are declared early.I had stored my findings in a text file in the morning to post in the evening.Any way the comments tally with my findings.However in the variation given by Harry
1.Bg5 Rh1+
2.Kf2 Rf8
3.Bf6+ Rxf6
4.exf6 one need wait for the new Q.Mate is in the corner by Rc8+,Rg7+ and Rh8+.It can be delayed by inserting b at e8.
One more funny variation when black does not take R at c7.
1.Bg5 Rf8
2.Bf6 Rxf6
3.Rc8+ leads to mate.