White to move. White sacrificed a lot of material to launch an attack. Does White have anything? How should White proceed?
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Tactical calculation
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Kf5
1.Nf7+ Kg8 2.Qh6. Can’t see how black can prevent being checkmated.
Kf5 puts alot of pressure on black
Yeah, I like Nf5 (knight to f5). Kf5 (king to f5) is not possible ;).
After 1. Nf7+ 2. Kh7, does white have anything?
My oppinion:
1.Nf5, e4 -+;
1.Nf7, Kh7;
2.Qh6, Kh8;
3.Qh8 ++;
1.Nf7, Kg8;
2.Qh6?,Rc2 -+;
1.Nf7, Kg8;
2.Nxg5 +-;
I think we need some follow-up before I’m convinced on Nf5. Especially e4 as a response.
After Nf7+ Kg8 (Kh7 Qh6 and wins) Qg6 I think white has at least a draw by perpetual check but I can’t see a win.
I agree with Simon.
Maybe there,s only the perpetual, because black has two strong defensive moves…e4 and Qd3.
For exemple:
1. Nf7, Kg8;
2. Nxg5, Qd3; preventing the sequence Qf7 and Qg6.
Simon, I’m having trouble seeing the win after 1. Nf7+ Kh7 2. Qh6 Kxh6. What happens after that?
Doh, never mind the previous. 😉
I would move Qxe5, followed by the Knight forking (Nf7+) the King and Queen (assuming that Black would take the White Queen).
I think Nf5 forces mate in all variations.
1. Nf5 e4
2. Qh6+ Kg8
3. Ne7+ Kf7 (3. … Kf8 4. Ng6+ Ke8 5. Qh8+ Nf8 6. Qxf8#)
4. fxe4+ Rf2 (4. … Nf4 5. Nf5+ Rc7 [5. … Ke8 or f8 6. Qh8#; 5. … Kg8 6. Rxg7+ Kf8 7. Qh8#; 6. … Qxg7 7. Qxg7#] 6. Rxc7+ Kg8 [6. … Ke8 or f8 7. Qh8#] 7. Rxg7+ Kf8 8. Qh8#, or 7. … Qxg7 8. Qxg7#; 4. … Nf5 5. Qg6+ Kf8 6. Qg8#; 4. … Qf3 leads to the mates already cited)
5. Rxf2+ Nf4 (5. … Qf3 or … Nf5 lead to variations given above)
6. Nf5+ Rc7
7. Rxc7+ Kg8
8. Rxg7+ Qxg7
9. Qxg7#
Other options:
1. Nf5 Kg8
2. Rxg7+ Nxg7
3. Qxg7#
1. Nf5 Kh7
2. Rxg7+ Nxg7
3. Qxg7#
1. Nf5 Rc7
2. Rb8+ etc.
jcheyne
Daniel, Black is up material, so trades are good for black. After 1. Qxe5 Qxe5 2. Nf7+ Kg8 3. Nxe5 Rxc6, all that’s left is a mop-up operation and Black wins.
Hoffi:
1. Nf7+ Kg8 2. Qh6 Rc7!! 3. Rxc7 Nxc7 4. Qg6 a1Q 5. Nh6+ 1/2
1. Nf5 wins though
You move your knight to f5, which takes the knight away from the edge of the board. Black counters with the pawn to e4, which attacks your queen. You move your queen to h6, which moves it to safety, protects your pawn at c6, and checks Black’s king. Black is forced to move king to g8, which moves it out of check and forks your pawn at c6 and your knight. You move your knight to e7, which moves it to safety, removes the threat on your pawn at c6, and forks Black’s rook at c8 and Black’s king. Black answers with king to f7, which moves it out of check. Your pawn takes pawn, which checks Black’s king with a discovered check and creates a passed pawn on e4. Black replies by moving rook to f2, which removes the threat on Black’s king and threatens your rook at f1. Your rook captures rook, which forks Black’s king and Black’s pawn at a2. Black counters by moving the knight to f4, which removes the threat on Black’s king. You move your knight to f5, which checks Black’s king with a discovered check. Black counters by moving the rook to c7, which removes the threat on Black’s king and blocks your pawn at c6. Your rook takes rook, which checks Black’s king and moves it behind the passed pawn at c4. Black counters with king to g8, which moves it out of check. Your rook at c7 takes knight, which checks Black’s king. Black responds with queen takes rook, which removes the threat on Black’s king and Black’s pawn at g5. Your queen takes queen, which checkmates Black’s king.
You can force mate in nine moves.