In no line any counter attack like axb2 became possible. f7 coming under double attack is one motive here in 2 different lines, Rc7/Rd7 is another motive.
How about 1.Bxh7+ and then: if 1…Kxh7 2.Qh4+ Kg8 (if 2…Kg6 3.Qg5+ Kh7 4.Qh5+ and 4…Kg8 anyway) 3.Ng5 Rfe8 4.Qh7+ Kf8 5.Rc7 and 6.Qh8++ follows (if instead 3…Rfc8 4.Qh7+ Kf8 5.R(either)e1 Ne4 6.Rxe4 and 7.Qh8++ follows as well) And if 1…Kh8 2.Qh4 Rfe8 3.Bg6+ (or Bf5+) 3…Kg8 4.Qh7+ Kf8 5.Rc7 followed by 6.Qh8++ again
You all found Bxh7, but too few of you have looked into the line where black avoids helping white to mate:
1. Bxh7+ Kxh7 2. Qh4+ Kg8 (more natural than Kg6) 3. Nf5 Rfe8 (pretty enforced) 4. Qh7+ Kf8 and before white can mate, he must take a desicion and do something with his Re7….
Bxh7..idea is Qh5 folowed by NG5 1-0
Bxh7+ ..idea is Qh5 followed by Ng5 1-0
Bxh7+ forcing Kxh7..even of Kh8 white plays Qh5 followed by Ng5 +-
Qh4, Bh2
1. Bxh7+ Kxh7
2. Qh4+ Kg6
3. Qg5+ Kh7
4. Qh5+ Kg8
5. Ng5
6. Qh7+ check mate
1. Bxh7+ Kh8
2. Qh4
3. Bg6+(or Bxg6+ if g6)Kg8
4. Qh7+ check mate
Bh7 Qh4
1. B:h7+ seems to do the trick.
If
1 … K:h7
2 Qh4+ Kg8 (2 … Kg6; 3 Qg5+)
3 Ng5 and mates next
If
1 … Kh8
2. Qh4 g5
3. Qh6 and mate in 2
1. Bxh7+!
a.) 1. … Kh8 2. Qh4 g6 3. Qh6 followed by Bxg6+ and Qh7#
b.) 1. … Kxh7 2. Qh4+ Kg6 3. Qg5+ Kh7 4. Qh5+ Kg8 5. Ng5 followed by Qh7#
1. Bxh7+
1. … Kxh7
2. Qh4+
2. … Kg8
3. Ng5 Rd8
4. Qh7+ Kf8
5. Qxg7#
2. … Kg6
3. Qg5+ Kh7
4. Qh5# Kg8
5. Ng5 etc.
1. … Kh8
2. Qh4 etc.
I immediately think that a check must be tried here:
1. Bxh7+ Kxh7 (Kh8 below)
2. Qh4+ Kg6 (Kg8 below)
3. Qf5+ Kh7
4. Qh5+ Kg8
5. Nf5! Rfe8 (axb2 Qh7#)
6. Qxf7+ Kh8
7. Qxg7#
This was kind of easy, Q on h5 proved to be very good!
2. … Kg8
3. Nf5! Rfe8 (axb2 Qh7#)
4. Rc7! Re7/axb2 (all other moves fail as well)
5. Qh7+ Kf8
6. Qh8#
3. … Rfd8
4. Rc7 Rd7 (delays by 1)
5. Rxd7 axb2
6. Qh7+ Kf8
7. Qh8#
1. … Kh8
2. Qh4 Rfe8/Rfd8 (axb2 Bg6+ Kg8 Qh7#)
3. Bg6+ Kg8
4. Qh7+ Kf8
5. Rxf7+! Ke8
6. Qh8#
In no line any counter attack like axb2 became possible.
f7 coming under double attack is one motive here in 2 different lines, Rc7/Rd7 is another motive.
Very interesting!
How about 1.Bxh7+ and then: if 1…Kxh7 2.Qh4+ Kg8 (if 2…Kg6 3.Qg5+ Kh7 4.Qh5+ and 4…Kg8 anyway) 3.Ng5 Rfe8 4.Qh7+ Kf8 5.Rc7 and 6.Qh8++ follows (if instead 3…Rfc8 4.Qh7+ Kf8 5.R(either)e1 Ne4 6.Rxe4 and 7.Qh8++ follows as well)
And if 1…Kh8 2.Qh4 Rfe8 3.Bg6+ (or Bf5+) 3…Kg8 4.Qh7+ Kf8 5.Rc7 followed by 6.Qh8++ again
You all found Bxh7, but too few of you have looked into the line where black avoids helping white to mate:
1. Bxh7+ Kxh7
2. Qh4+ Kg8 (more natural than Kg6)
3. Nf5 Rfe8 (pretty enforced)
4. Qh7+ Kf8
and before white can mate, he must take a desicion and do something with his Re7….