< Earlier Kibitzing · PAGE 1 OF 2 ·
|Aug-04-11|| ||310metaltrader: He has to take for sure, correct. o/w it is black to move and qh3 sets up a discovered check and then mate?|
|Aug-04-11|| ||ColeTrane: plus a bit of rook lifting but AFTER the sack . . .|
|Aug-04-11|| ||tacticalmonster: 22 Bxe5 dxe5 23 Bxh7+ Kxh7 24 Rxf7 Rxf7 25 Rxf7 Rg8 26 Qh3+ Kg6 27 Qf5+ Kh6 28 g4! g6 29 g5+ Bxg5 (29 Kh5 30 Rh7#) 30 Qh3+ Bh4 31 Qxh4#|
Time spent: 25 min
|Aug-04-11|| ||whiteshark: <21...g6> and there would have been no trouble|
|Aug-04-11|| ||Uvulu: I found exactly the same solution as tacticalmonster (although I inverted the order of the first two moves). I didn't realize it wasn't necessary to take the knight on e5 before sacrificing the rook on f7 as the little horse is pinned due to Qxg7#...|
|Aug-04-11|| ||azax: What is this, Greek Gift week?|
|Aug-04-11|| ||stacase: That was fun.
I still remember the first time someone pulled that Bishop sacrifice on me. They had planned if from the first move and I walked right in to it.
|Aug-04-11|| ||TheBish: J B Bednarski vs J Adamski, 1978|
White to play (22.?) "Medium"
White has all his pieces poised to attack the enemy king. The d4 bishop is adequately blocked by Black's knight, but if the knight moves, this bishop will attack g7 directly, which is a key part of the attack.
22. Bxh7+! Kxh7
The only other move is 22...Kh8, which results in the same follow-up move, so Black may as well gobble the piece.
23. Rxf7 Rxf7
Here Black can get tricky with 23...Bg5!? (seeing 24. Rxc7?? Rxf1#), but then White switches gears with 24. Rxf8 Rxf8 25. Rxf8 with a winning advantage. Of course, Black gets mated after 23...Nxf7 24. Qxg7#.
24. Rxf7 Rg8
Or 24...Ng6 25. Rxg7+ Kh8 26. Rxg6+ and mate is near, or Black can give up his queen with 24...Bf6.
25. Qh3+ Kg6 26. Qf5+ Kh6 27. Be3+ g5 28. Qh7#.
|Aug-04-11|| ||patzer2: Got as far as 22 Bxe5 dxe5 23 Bxh7+ Kxh7 24 Rxf7 Rxf7 25 Rxf7 Rg8 26 Qh3+ Kg6 27 Qf5+ Kh6 but missed <tacticalmonster>'s find of 28. g4! leading to mate.|
Best I could find was a perpetual with 28. Qh3+ Kg6 29. Qh3+ etc.
Haven't run it through the computer yet, but it would appear the game continuation is a bit shorter win.
|Aug-04-11|| ||abuzic: 22.Bxh7+
-23...Rxf7 24.Rxf7 Rg8 25.Qh3+ Kg6 26.Qf5+ Kh6 27.Be3+ Bg5 28.Qxg5+ Kh6 29.Qh6#. (If 24...Rg8 25.Qh3+ Bh4 (or 25...Kg6) 26.Qf5+ and mate as before).
-23...Bg5 24.Rxf8 Rxf8 25.Rxf8 white is up the exchange + 2P
If 22...black declines with Kh8 things are worse after 23.Bxe5 dxe5 24.Rxf7 Rxf7 25.Rxf7 Bf6 26.Bg6 and black cannot stop mate.
|Aug-04-11|| ||cocker: In boxing terms this is a nice one-two. Afraid I missed it. Why so few comments today?|
|Aug-04-11|| ||morfishine: Sometimes chess is like golf. We find ourselves on a course that doesn't "fit our eye". We can never get comfortable on this particular course and hence we don't play well. But chess, like golf, requires that we press on regardless and give it our best try. |
So, here's my best try: <22.Bxh7+> Kxh7 23.Rxf7 Rxf7 24.Rxf7 Rg8 25.Qh3+ and white wins:
click for larger view
I'll check when I get back from work today
|Aug-04-11|| ||sevenseaman: Looks a bit of a deja vu of yesterday but my first hit is still 22.Bh7+. The
main difference today is my DSB is aligned for a non-negotiable Q+ at g7.
Hence I've the luxury of staking both my rooks at f7 and the putsh becomes
irrefutable. If Black tries to defend with Rg8, Qh3+, with Qf5# looming, becomes the last rites.|
I expect it go,
22. Bh7+ Kxh7 23. Rxf7 Rxf7 24. Rxf7 Nxf7 25. Qxg7#,
But it could well be the longer version,
22. Bxh7 Kxh7 23. Rxf7 Rg8 24. Qh3+ Kg6 25. Qf5+ Kh6 26. Be3+ g6 27. Qh7#
click for larger view
<cocker> <Why so few comments today?> May be reappearance of yesterday's
B sac theme on h7 is causing the hesitation! I too was flustered for a moment
|Aug-04-11|| ||CHESSTTCAMPS: White has 2Bs versus B+N and a space/mobility advantage. White has all pieces directed towards the kingside, while black has all pieces near the kingside, but several are ineffective defenders. g7 and h7 are defended only by the king, while f7 is defended 3 times. So f7 is the least likely point for a breakthrough, right?|
A move I investigated immediately thanks to yesterday's POTD.
22... Kxh7 (Kh8 23.Qh3 wins quickly) 23.Rxf7!
The point - one defender is pinned and a 2nd has been diverted. Therefore white wins f7 by numbers and black has no good defense for g7.
A) 23... Rxf7 24.Rxf7 Rg8 (Nxf7 25.Qxg7#) 25.Qh3+ Kg6 26.Qf5+ Kh6 (Kh8 27.Qh5#) 27.Bd3+ (g5 28.Rh7#) Bg5 28.Qxg5+ Kh7 29.Qh6#
A.1) 24... Ng6 25.Rxg7+ Kh8 (Kh6 26.Qxg6+) 26.Qh3+ Nh4 27.Rxd7+ wins.
B) 23... Rg8 is similar to A.
C) 23... Ng6 24.Rxg7+ wins.
D) 23... Bf6 24.Rxc7 wins.
Time for game review.
|Aug-04-11|| ||sevenseaman: < tacticalmonster> < 22 Bxe5 dxe5 23 Bxh7+ Kxh7 24 Rxf7 Rxf7 25 Rxf7 Rg8 26 Qh3+ Kg6 27 Qf5+ Kh6 28 g4! g6 29 g5+ Bxg5 (29 Kh5 30 Rh7#) 30 Qh3+ Bh4 31 Qxh4#>|
(29 Kh5 30 Rh7#) is good insight.
By sacking both his Bs <tacticalmonster > made things a bit tougher for himself, but he found a commendable resource to implement a different, daring kind of solution.
|Aug-04-11|| ||abuzic: 22.Bxe5 wins material, but black can avoid mate threats easily: 22...g6!; but even after 22...dxe5 23.Bxh7+ Kxh7 (otherwise forced mate) 24.Rxf7 Bg5 (not 24...Rxf7 nor 24...Bf6 and black at least loses the Q) 25.Rxf8 Rxf8 26.Rxf8 Qxc2 and white is up the exchange + P.|
|Aug-04-11|| ||abuzic: If black declines after 22.Bxh7+ Kh8? then black cannot escape mate after 23.Bxe5!
-23...dxe5 24.Rxf7 Rxf7 25.Rxf7 Bf6 26.Bg6 Qd8 27.Rxf6 Qxf6 28.Qh3+ Kg8 29.Qh7+ Kf8 30.Qh8+ Ke7 31.Qxe8+ Kd6 32.Qc6+ Ke7 33.Qc7+ Kf8 34.Qc5+ Kg8 35.Qc8+ Qf8 36.Bf7+ Kxf7 37.Qe6# |
If black plays 27...Kg8 then faster is 28.Bf7+ Kf8 29.Rf5 Qc8 30. Be6+ Ke7 31.Qxg7+ Kd6 32.Qe5+ Kc5 33.Qe3+ Kd6 34.Qb6+ Qc6 35.Qxc6+ Ke7 36.Qd7 (or Qc7)#.
|Aug-04-11|| ||abuzic: <tacticalmonster: 22 Bxe5 dxe5 23 Bxh7+ Kxh7 24 Rxf7 Rxf7 25 Rxf7 Rg8 26 Qh3+ Kg6 27 Qf5+ Kh6 28 g4! <g6> 29 g5+ Bxg5 (29 Kh5 30 Rh7#) 30 Qh3+ Bh4 31 Qxh4#>
Here is another mate: 28...Bg6 29.Rxc7 g6 30.Qxe5 Bd8 31.Qe3+ g5 32.Qh3+ Kg6 33.Qd3+ Kh6 34.Rh7#|
|Aug-04-11|| ||agb2002: White has the bishop pair for a bishop and a knight.|
The knight can only move to the g-file because of the mate on g7. This means that it doesn't actually defends f7. Therefore, 22.Bxh7+, diverting the king from f7:
A) 22... Kxh7 23.Rxf7
A.1) 23... Rg8 24.Qh3+
A.1.a) 24... Kg6 25.Qf5+ Kh6 26.Be3+ Bg5 27.Qxg5+ Kh7 28.Qh5#.
A.1.b) 24... Bh4 25.Qxh4+ Kg6 26.R1(7)f6+ gxf6 27.Rxf6+ Kg7 28.Qh6#.
A.2) 23... Ng6 24.Rxg7+ Kh8 (24... Kh6 25.Qxg6#) 25.Rg8+ Kxg8 (25... Kh7 26.Qxg6#) 26.Qxg6#.
A.3) 23... Bf6 24.Rxc7 + - [Q+P vs N].
A.4) 23... Rxf7 24.Rxf7 is similar to previous lines. For example, 24... Rg8 25.Qh3+ Bh4 26.Qxh4+ Kg6 27.Rxc7, etc.
B) 22... Kh8 23.Qh3 g6 24.Bxg6+ Kg7 25.Qh7#.
|Aug-04-11|| ||scormus: Got Bxh7+ and Rxf7 :)
.... but in the wrong order. Unfortunately ... Kxh7 is not forced and W doesnt win :(
I guess my upcoming holiday is too much on my mind. Means no internet for 2 weeks and no posts.
Looking out the window I see the rain arrived right on cue
|Aug-04-11|| ||Patriot: There are quite a few candidates: Bxh7+, Qxg7+, Bxe5, Rxf7, Rh4, Qh3|
22.Qxg7+ Kxg7 23.Rg4+ Kh8 and white quickly runs out of steam. So onto the next strongest candidate...
22.Bxh7+ Kxh7 (22...Kh8? Thanks for at least a pawn but probably 23.Qh3 or 23.Bxe5 first)
This is the real difficulty in the problem. There are multiple forcing moves to consider: Qh3+, Rh4+, Qxg7+, Bxe5, Rxf7. Some can be tossed out because they aren't safe (Rh4+ and Qxg7+). Some look questionable because they quickly seem to fizzle the attack (Qh3+ and Bxe5). It's not that they are bad moves but they seem to have no purpose. The only one I liked here was Rxf7, which threatens mate on g7 and ties black down (the e7-bishop is pinned to the king). Also, 23...Nxf7 is impossible thanks to 24.Qxg7#.
Here I saw only two candidates (thanks to the mate threat): ...Rxf7, ...Rg8.
23...Rxf7 seems like the best try because it at least eliminates one of the attackers. Unfortunately the attack is "re-loaded".
24.Rxf7 Rg8 (forced) 25.Qh3+ Kg6 26.Qf5+
Here I stopped. Then I went back and reviewed what might have been done differently after 25.Qh3+, like 25...Bh4. This just hangs the queen and wins the bishop. 26.Qxh4+ Kg6 27.Rxc7. The bad thing about this is that I missed the fact the queen is hanging. My sights were on attacking the king so I missed the piece on the other side--the queen. This is a kind of tunnel-vision I run into sometimes and is the same thing that happened yesterday, except it was a knight hanging. It seems to be a difficulty of trying to balance ideas with raw calculation.
|Aug-04-11|| ||Patriot: <The only one I liked here was Rxf7, which threatens mate on g7 and ties black down (the e7-bishop is pinned to the king).> Make that <the e7-bishop is pinned to the queen)>.|
|Aug-04-11|| ||Marmot PFL: Being a puzzle the obvious move to consider is 22 Bxh7+ (which was also an earlier solution this week if I recall correctly) Kxh7 23 Rxf7 Rxf7 24 Rxf7 (for the bishop white has 2 pawns, mate on g7 is threatened and Ne5, Be7 and pg7 are pinned) Rg8 25 Qh3+ Kg6 26 Qf5+ Kh6 27 Be3+ g5 l28 Rh7 mate. This is a fairly simple variation but even in more complicated lines this sacrifice can often be played on intuition. White gets a strong attack for a minimal amount of material and black's pieces can hardly move.|
|Aug-04-11|| ||gofer: I think this is easier than yesterday. White exploits the pinned knight to open up black's defenses.
The knight cannot move as Qxg7# is threatened, so the queen and DSB stay where they are and let the
two rooks and LSB exploit the weakness of Pf7 which is defended twice and attacked twice, but Bxh7+
removes one of those two defenders! As Qc7 is undefended a rook on f7 weakens Pg7 as Bf8 and Bf6 are
not available... ...all in all rather a nice position!|
<22 Bxh7+ ...>
22 ... Kh8 is worse than accepting the sacrifice as it doesn't allow Rg8 as a defense...
<22 ... Kxh7+>
<23 Rxf7 Rg8>
<24 Qh3+ Kg6>
<25 Qf5+ Kh6>
<26 Be3+ g5>
Time to check...
|Aug-04-11|| ||belgradegambit: A very easy Thursday since Bxh7+ is the first move most would look at and the rest follows.|
< Earlier Kibitzing · PAGE 1 OF 2 ·