A queen sacrifice followed by Ng5+ puts the black king on the run. White can double his rooks on the h file and the black pawn at g7 is vulnerable to attack. White’s king is vulnerable, though, so he mustn’t let black gain much tempo.
[FEN “r2q1rk1/1b2bppp/1ppn4/3p4/5N2/1pBQ2PN/P1P2PP1/2K1R2R w – – 0 0”]
1. Qxh7+ Kxh7 2. Ng5+ Kg8 3. Rh7 b2+ ({Fritz 13 chose this line:} 3… f6 4. Reh1 Nf7 5. Nge6 Ba3+ 6. Kd1 bxc2+ 7. Kxc2 Nh6 8. Rxg7+ Kh8 9. Rxh6#) 4. Kb1 ({Seems safe for bishop to take b2, but no, black gains dangerous tempo and the white king is vulnerable.} 4. Bxb2 Bf6 5. Bxf6 (5. Reh1 Bxb2+ 6. Kxb2 Qf6+ 7. Kb1 g6 8. Rh8+ Qxh8 9. Rxh8+ Kxh8 {Not looking good for white.}) 5… Qxf6 6. Reh1 Qa1+ 7. Kd2 Nc4+ {Not looking good for white.}) 4… d4 (4… Bf6 5. Reh1 g6 (5… Bxc3 6. Rh8#) 6. Rh8+ Bxh8 7. Rxh8#) 5. Reh1 g6 6. Rh8+ Kg7 7. Bxd4+ Bf6 8. R1h7#
1. Ng5 looks good, but after much consideration it seems that 1…Ne4 block enough lines to defend everything.
So in order to avoid this, 1. Q:h7+ K:h7 2. Ng5++ Kg8 3. Rh7 (threatening mate with 4. R:g7+ and 5. Rh1#) when 3…f6 seems necessary.
Now 4. Rhe1 threatens Rh8# and the Pf6 can’t capture the N because 5. R:g7 would be mate. So black’s only move is 4…Nf7. This also does Black the service of freeing the Be7 to go to a3.
But 5. Nge6 leaves black no further defense against the mate threats other than spite checks.
Since it’s the annual firecracker festival and neighborhood battle zone day, there is no doubt that the first move is bound to be 1. Qxh7+. Most chess players would look at that first any day though, just to see if it would work.
1. Qxh7+ Kxh7 2. Ng5+ Kg8 3. Rh7! (3. Rh8+??? would be played by most of the dumbhead pyromaniacs in my neighborhood.) 3. .. f6
The queen sacrifice sort of sticks out because of the potential double check, but it took me a bit of time to see all the other implications- especially white’s third move:
1. Qh7 Kh7 2. Ng5 Kg8 3. Rh7!
White is threatening two kinds of mate here- Rxg8 followed by Rxg5 and Reh1 if black takes the g5 knight, and is threatening to bring the other rook to h1 to threaten Rh8#. There are various delaying moves like d4, b2, Nf5, etc. but I see no way to prevent the mate:
3. …..f6 (Bg5 4.Rg7 Kh8 5.Rg5+-) 4. Reh1 Nf7
If 4. …g6, then Rh8 and R1h7#, and, of course, 4. …fxg5 is mate after Rxg7. Continuing:
5. Nge6 and black can only delay the mate now with moves like b2, or Ba3 etc.
1. Ng5! g6 (1. … Bxg5 2. Qxh7#; 1. … h6 2. Qxh7#) 2. Rxh7 Kxh7 3. Rh1+ 1-0
1. Qxh7+ Kxh7
2. Ng5++ Kg8
3. Rh7 d4 (Prolonging the agony).
4. Bxd4
If 4…..Bxg5, then 5. Rxg7+, Kh8; 6. Rxg5 dis.ch., followed by 7. Rh1#.
If 4…..Nf5, then 5. Reh1, followed by Rh8#.
If 4…..f6, then 5. Reh1 (threatening Rh8#), fxg5, 6. Rxg7#.
A queen sacrifice followed by Ng5+ puts the black king on the run. White can double his rooks on the h file and the black pawn at g7 is vulnerable to attack. White’s king is vulnerable, though, so he mustn’t let black gain much tempo.
[FEN “r2q1rk1/1b2bppp/1ppn4/3p4/5N2/1pBQ2PN/P1P2PP1/2K1R2R w – – 0 0”]
1. Qxh7+ Kxh7
2. Ng5+ Kg8
3. Rh7 b2+
({Fritz 13 chose this line:}
3… f6
4. Reh1 Nf7
5. Nge6 Ba3+
6. Kd1 bxc2+
7. Kxc2 Nh6
8. Rxg7+ Kh8
9. Rxh6#)
4. Kb1
({Seems safe for bishop to take b2, but no, black gains dangerous tempo and the white king is vulnerable.}
4. Bxb2 Bf6
5. Bxf6
(5. Reh1 Bxb2+
6. Kxb2 Qf6+
7. Kb1 g6
8. Rh8+ Qxh8
9. Rxh8+ Kxh8 {Not looking good for white.})
5… Qxf6
6. Reh1 Qa1+
7. Kd2 Nc4+ {Not looking good for white.})
4… d4
(4… Bf6
5. Reh1 g6
(5… Bxc3 6. Rh8#)
6. Rh8+ Bxh8
7. Rxh8#)
5. Reh1 g6
6. Rh8+ Kg7
7. Bxd4+ Bf6
8. R1h7#
1. Ng5 looks good, but after much consideration it seems that 1…Ne4 block enough lines to defend everything.
So in order to avoid this, 1. Q:h7+ K:h7 2. Ng5++ Kg8 3. Rh7 (threatening mate with 4. R:g7+ and 5. Rh1#) when 3…f6 seems necessary.
Now 4. Rhe1 threatens Rh8# and the Pf6 can’t capture the N because 5. R:g7 would be mate. So black’s only move is 4…Nf7. This also does Black the service of freeing the Be7 to go to a3.
But 5. Nge6 leaves black no further defense against the mate threats other than spite checks.
Since it’s the annual firecracker festival and neighborhood battle zone day, there is no doubt that the first move is bound to be 1. Qxh7+.
Most chess players would look at that first any day though, just to see if it would work.
1. Qxh7+ Kxh7 2. Ng5+ Kg8 3. Rh7! (3. Rh8+??? would be played by most of the dumbhead pyromaniacs in my neighborhood.) 3. .. f6
(3. .. Bxg5 4. Rxg7+ Kh8 5. Rxg5+ f6 6.Rh1#)
(3. .. Bf6 4. Reh1 g6 5. Rh8+ Bxh8 6. Rxh8#)
4. Reh1 Nf7
(4. .. fxg5 5. Rxg7#)
5. Nge6 Ba3+ 6. Kd1 bxc2+ 7. Kxc2 Nh6 8. Rxg7+ Kh8 9. Rxh6#
1) ng5!, g6
2) nf4xg6, pxg6
3) qxg6, pxg6
4) rh8#
1. ♕xh7+ ♚xh7
2. ♘g5++ ♚g8
3. ♖h7, threatening
4. ♖xg7+ ♚h8
5. ♖h7+ ♚g8
6. ♖h8#
3. … ♝xg5
4. ♖xg5+ ♚h7
5. ♖h5+ ♚g8
6. ♖h8#
3. … ♜e8
4. ♖xg7+
4. … ♚h8
5. ♖h1#
4. … ♚f8
5. ♘h7#
3. … f6 or f5
4. ♖dh1, threatening
5. ♖h8#
4. … fxg5 or ♝xg5
5. ♖xg7#
1) rxe7, qxr
2) ng5, g6
3) rxh7 and black has no defense for h8#
Ng5 looks quite clear…but not sure what after …Ne4. Seems like black will hold it…
Ng5 looks quite clear…but not sure what after …Ne4. Seems like black will hold it…
The queen sacrifice sort of sticks out because of the potential double check, but it took me a bit of time to see all the other implications- especially white’s third move:
1. Qh7 Kh7
2. Ng5 Kg8
3. Rh7!
White is threatening two kinds of mate here- Rxg8 followed by Rxg5 and Reh1 if black takes the g5 knight, and is threatening to bring the other rook to h1 to threaten Rh8#. There are various delaying moves like d4, b2, Nf5, etc. but I see no way to prevent the mate:
3. …..f6 (Bg5 4.Rg7 Kh8 5.Rg5+-)
4. Reh1 Nf7
If 4. …g6, then Rh8 and R1h7#, and, of course, 4. …fxg5 is mate after Rxg7. Continuing:
5. Nge6 and black can only delay the mate now with moves like b2, or Ba3 etc.