1.Nh5 looks strong: 1.-Qb6:? 2.Qg7:+ Ke8 3.Nf6# 1.-Nh5: 2.Qd8: and black is likely to lose more material 1.-Rg8 2.Qf6+ Ke8 3.Rd6: Qc7 4.Qe5:+. Now, in all lines white wins back the sacrifice piece and remains six pawns up.
1.Nh5 seems strong, for example 1… Qxb6 2.Qxg7+ Kf8 3.Nf6#; 1… Rg8 2.Qf6+, winning; 1… Nxh5 2.Qxd8, with attack.
Not quite sure if the last line wins but it seems to me that the white queen and rook are stronger in this position than black’s queen and two light pieces, particularly considering that d6 will also fall.
I would play Nh5; after 1 .. Nxh5 2. Qxd8 with the threat of Rxd6. another possible line is: 1. Nh5 .. Rg8 2. Qf6+ .. Ke8 3. Rxd6 .. Qe7 4. Qg6+ .. Qf7 5. Nf6+
1…Qxb6 2. Qxg7+ Ke8 3. Nf6#; 1…Nxh5 2. Qxd8 and White’s attack after taking on d6 should be winning; and 1…Rg8 2. Qf6+ Ke8 3. Rxd6 with too many threats.
(1) Nh5! if Qxb6 (2) Qxf6+ Ke8 (Kg8 Qxg7++) (3) Nxg7+ Kd7 (4) Qe6++ So 1… Nxh5 (2) Qxd8 preparing to win pawn on d6 with Q and R coordinated for attack.
1.Nh5…Nh5
2.Qd8 followed by Rd6 wins
1.Nh5 looks strong:
1.-Qb6:? 2.Qg7:+ Ke8 3.Nf6#
1.-Nh5: 2.Qd8: and black is likely to lose more material
1.-Rg8 2.Qf6+ Ke8 3.Rd6: Qc7 4.Qe5:+. Now, in all lines white wins back the sacrifice piece and remains six pawns up.
1.Nh5 seems strong, for example
1… Qxb6 2.Qxg7+ Kf8 3.Nf6#;
1… Rg8 2.Qf6+, winning;
1… Nxh5 2.Qxd8, with attack.
Not quite sure if the last line wins but it seems to me that the white queen and rook are stronger in this position than black’s queen and two light pieces, particularly considering that d6 will also fall.
Beelze
I would play Nh5;
after 1 .. Nxh5
2. Qxd8 with the threat of Rxd6.
another possible line is:
1. Nh5 .. Rg8
2. Qf6+ .. Ke8
3. Rxd6 .. Qe7
4. Qg6+ .. Qf7
5. Nf6+
One is certainly tempted to draw black’s knight away from the defense:
1. Nh5 Nh5
2. Qd8 Qd7 (what else?)
3. Qd7 Bd7
4. Rd6 and white should be able to win this with all the extra pawns.
Black’s other options on his first move aren’t any better.
1. Nh5 Qb6
2. Qg7 Ke8
3. Nf6#
1. Nh5 Rg8
2. Rd6 Qe7
3. Qg6 Kf8
4. Rf6 Qf6 (only move)
5. Qf6 followed by loss of another piece. And if,
1. Nh5 Rg8
2. Rd6 Qc7
3. Qg6 Ke7 (Kf8 same as above)
4. Qf6 Ke8
5. Qe5 Qe7 (Kf8 is mate in two)
6. Nf6 Kf8
7. Qf4 Nh5
8. Ng8 Nf4
9. Ne7 Ke7
10.Rc6/a6 wins easily.
How about Nh5?
1.Nh5 Rg8 2.Qf6+ Ke8 3.Rxd6 Qc7 4.Qg6+ Qf7 (-Ke7 Rf6, -Kf8 Rg6+) 5.Nf6+ 1-0
1.Nh5 ne8 2.qxd8 should do it
Let’s see, perhaps 1. Nh5:
1…Qxb6 2. Qxg7+ Ke8 3. Nf6#;
1…Nxh5 2. Qxd8 and White’s attack after taking on d6 should be winning; and
1…Rg8 2. Qf6+ Ke8 3. Rxd6 with too many threats.
Am I missing something?
1.Nh5 Nxh5
(1…Qxb6 2.Qxg7+, Ke8
3.Nf6 mate)
2.Qxd8
following by Rxd6 and white is close to be winning
1. Nh5
(1) Nh5! if Qxb6
(2) Qxf6+ Ke8 (Kg8 Qxg7++)
(3) Nxg7+ Kd7
(4) Qe6++
So 1… Nxh5
(2) Qxd8 preparing to win pawn on d6 with Q and R coordinated for attack.
1. Nh5
if … Qxb6
2 Qxg7+ Ke8
3 Nf6#
if … Nxh5
2 Qxd8 wins exchange and more
if … Ke8
2 Nxb6+ picks up a knight
Mark
1.Nh5, attacking the black knight and rook.
If 1…QxRb6, then mate via 2.QxNg7+ forcing 2…Ke8 and 3.Nf6 is mate.
If 1…Rg8 then 2.Qf6+ Ke8 and 3.Rxd6 should do it. On 3…Bd7 then 4.NxNg7+ RxNg7 5.QxRg7 pocketing the rook.