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Dec-15-10
 | | Domdaniel: It's not *quite* true to say that after 41...Bxf3, white must take the Bishop "or mate follows on g2". A Rook move clears e1, but it's hopeless, eg:
41...Bxf3 42.Re3 Qxg2+ 43.Ke1 Qh1+ and Black can exchange Queens and play ...Bf4. There are other wins. The forced mate after 42.gxf3 Qxh3+ 43.Kg1 Bh2+ is unusually straightforward "for a Wednesday". If this *is* Wednesday. I lose track. |
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Dec-15-10
| | Domdaniel: Quicker still is 42.Re3 Qh1+ 43.Bg1 Qxg2+ 44.Ke1 Be3#. No, moving the Rook doesn't help. |
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| Dec-15-10 | | agb2002: The material is even.
White would probably try Ne4 or Nd7 to reduce Black's attacking forces. The light squares around the white king look weak. Therefore, 41... Bxf3, threatening 42... B(Q)xg2#: A) 42.gxf3 Qxh3+ 43.Kg1 Bh2+ 44.Kh1 Bg3+ 45.Kg1 Qh2+ 46.Kf1 Qxf2#. B) 42.Re3 Qh1+ 43.Bg1 Qxg2+ 44.Ke1 Qxg1+ 45.Kd2 Qf2+ 46.Kd3 Rxd4+ 47.Kxd4 Ne2+, etc. C) 42.Re5 Qh1+ 43.Bg1 Qxg2+ 44.Ke1 Qxg1+ 45.Kd2 Qf2+ 46.Kd3 Rxd4#. |
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| Dec-15-10 | | agb2002: <Domdaniel: Quicker still is 42.Re3 Qh1+ 43.Bg1 Qxg2+ 44.Ke1 Be3#.> I think you meant 44... Bg3+ and mate next. This is much quicker than my line B. |
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| Dec-15-10 | | TheaN: Wednesday 15 December
<41....?>
Material: =
Candidates: Qh1†, Ne2, <[Bxf3]> -ML-
Once you see it this is a straightforward combination. It amazes me, however, how White can get himself in this mess without a material plus. In the end this wouldn't matter much to Black, whom most gladly destroys the kingside of White with: <41....Bxf3!> the only regulated non-forcing move in this position does in fact become forced for White if you consider that 42....Qxg2‡ is otherwise unavoidable. <42.gxf3 Qxh3† 43.Kg1> this enforces a very common pattern where the minor piece check is stronger as it can relocate itself. In this case it's the bishop going to g3 attacking f2: <43....Bh2† 44.Kh1 Bg3† 45.Kg1 Qh2† 46.Kg1 Qxf2‡ 0-1> and the light squared domination which started this combination becomes evident. |
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Dec-15-10
 | | perfidious: The solution is 41....Bxf3 42.gxf3 Qxh3+ 43.Kg1 Bh2+ with a familiar mating pattern. |
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| Dec-15-10 | | gofer: Fly like a butterfly. Sting like a bee!
41 ... Bxf3
The threat of Qxg2# has to be stopped and there is only way for white to do this as; 42 Rd1 leads to a forced mate in 3. 42 Rd1 Qh1+ 43 Bg1 Qxg2+ 44 Ke1 Qe2#
42 gxf3 leads to a forced mate in 7. 42 gxf3 Qh1+ 43 Bg1 Qxf3+ 44 Bf2 Qxh3+ 45 Kg1 Bh2+ 46 Kh1 Bg3+ 47 Kg1 Qh2+ 48 Kf1 Qxf2# Main Line (if white doesn't resign on the spot)
42 Re2 Bxe2+
43 Ke1 Qh1+
44 Kd2 Bf4+
45 Be3 Bxe3+
46 Kxe3 Qxg2
Black has just won a whole rook and two pawns and the white king has been marched into the centre of the board.
I think its time to go quietly as there are significant threats ahead (i.e. 47 ... Nd1+ 48 Kd2 Bxc4+ 49 Kxd1/Ke1
Qe2# or 48 Kf4 Qf3+ 49 Ke5 Qf5#)...
Time to check... |
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| Dec-15-10 | | gofer: <42 gxf3 leads to a forced mate in 7. 42 gxf3 Qh1+ 43 Bg1 Qxf3+ 44 Bf2 Qxh3+ 45 Kg1 Bh2+ 46 Kh1 Bg3+ 47 Kg1 Qh2+ 48 Kf1 Qxf2#> Not quite sure why I decided to take Pf3 and extend the mating sequence by 2 moves. That seems a little greedy and unnecessary. Anyone else looking at 42 Re2 and can find a swifter solution? |
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| Dec-15-10 | | knight knight: 41...Bxf3 (threat 42...Qxg2#)
a) 42. gxf3 Qxh3+ 43. Kg1 Bh2+ 44. Kh1 Bg3+ 45. Kg1 Qh2+ 46. Kf1 Qxf2# b) 42. Rd1 Qh1+ 43. Bg1 Qxg2+ 44. Ke1 Qe2#
c) 42. Re2 Nxe2 on the queen so no time for 43. gxf3, black is rook and pawn up with devastating attack c) 42. Re3 Qh1+ 43. Bg1 Qxg2+ 44. Ke1 Qxg1+ 45. Kd2 Qxc1+ 46. Rxc1 Bf4 with a massive material advantage d) 42. Re4 Qh1+ 43. Bg1 Qxg2+ 44. Ke1 Qxg1+ 45. Kd2 Nxe4+ 46. Nxe4 Rxd4+ 47. Kc2 Bxe4+ carnage e) 42. Re5 Qh1+ 43. Bg1 Qxg2+ 44. Ke1 Qxg1+ 45. Kd2 Qf2+ 46. Kd3 Rxd4# Easier than yesterday's puzzle I think. |
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| Dec-15-10 | | zb2cr: <Domdaniel>, <Once>, and <mrsaturdaypants> have explained matters well. |
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| Dec-15-10 | | 4tmac: And Black announced Mate in 8 moves. |
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| Dec-15-10 | | CHESSTTCAMPS: Black has two bishops and a marauding queen invading white's weakened king position. White has all major pieces parked passively on the first rank, two minor pieces AWOL, and his king trapped in a box with a lone bishop as defender. Black can finish by destroying the king's pawn shelter: 41... Bxf3 threatens 42... Qxg2#. White has no good defense: A) 42.gxf3 Qxh3+ (Qh1+ takes longer) 43.Kg1 Bh2+ 44.Kh1 Bg6+ 45.Kg1 Qh2+ 46.Kf1 Qxf2# B) 42.Rd1 Qh1+ 43.Bg1 Qxg2+ 44.Ke1 Qe2#
C) 42.Re3 (or e4) Qh1+ 43.Bg1 Qxg2+ 44.Ke1 Bg3+ 45.Bf2 Qxf2# D) 42.Re5 Qh1+ 43.Bg1 Qxg2+ 44.Ke1 Bxe5 forces mate in 2. E) 42.Re2 Bxe2+ 43.Ke1 Qh1+ 44.Kd2 Bf4+ cleans up.
An easy combo for Najdorf. |
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| Dec-15-10 | | stacase: Oh yes, 41...Bxf3 covers the e2 escape route for Whites's King double. Allowing the Black's Queen to chew up the scenery in the corner producing a mate in short order. |
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| Dec-15-10 | | desiobu: The solution plays itself. |
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| Dec-15-10 | | Cryptale: All right, I went more like this:
41...Qh1+ 42. Bg1 Bxf3 and:
43. Qd2? Rxd4
43. Qc2 Bh2 43. Qf2 Bxg1 44. Qxg1 Bxg2+ 45. Kf2 Qxg1+ 46. Rxg1 Bxh3 I think White is going down anyway, losing bunch of pawns for free and probably dropping 'd4' unit as well. I wonder why I really don't know why I haven't thought about switching the move order. |
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| Dec-15-10 | | kevin86: I missed this one-My try was 41...♕h1+ 42 ♗g1 ♗h2... Does it lead anywhere? |
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| Dec-15-10 | | MiCrooks: Pattern recognition plays such an important part in chess. If you have seen the pattern before then the moves leading into it jump to mind if not then you can struggle to find the right continuation. This one is easy, but if you have looked at the classic bishop sack on h7 and play that follows when it is declined then finding the continuation is easy. The key to these positions is to be able to check with the Bishop with the Queen behind so that the Bishop can retreat with discovered check covering the mating square on f7 (f2 here). Why going through these puzzles is a good exercise. And why books like Vukovic's or even papa Polgar's big bible of tactical positions are so valuable especially for a young, developing player. |
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| Dec-15-10 | | petrie911: I got to 43...Bh2+, but somehow missed the mate. Instead, I found 44...Bf4+, picking up the queen. Black has a queen and 3 pawns for two bishops, which I believe is a crushing advantage. |
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| Dec-15-10 | | WhiteRook48: ha! I got it for once! |
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| Dec-15-10 | | Patriot: <<MiCrooks>: Pattern recognition plays such an important part in chess. If you have seen the pattern before then the moves leading into it jump to mind if not then you can struggle to find the right continuation.> Very true. I was distracted by 41...Qh1+ 42.Bg1 Bh2 (another pattern) but white has some ways out. Eventually I began looking at 42...Bxf3 and came around to the idea of playing it from the beginning. 41...Qh1+ first isn't quite as good because 42.Bg1 leaves f2 open for the king. For me that was the key, seeing the other familiar pattern 41...Bxf3 42.gxf3 Qxh3+ 43.Kg1 Bh2+ 44.Kh1 Bg3+ 45.Kg1 Qh2+ 46.Kf1 Qxf2#. So in a sense, the common advice of looking at forcing moves first starting with checks, captures, and threats (in that order) becomes a distraction for this puzzle. |
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| Dec-15-10 | | BOSTER: It seems to me that White had an iron nerves to keep the Black Knight on c3 all the game ,and when White Queen was on b2 or c2 it really looks like under umbrella ,or stone wall. |
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| Dec-15-10 | | wals: YES!!!!!!
Rybka 4 x 64 blunders only
depth: 20 : 18 min :
White
(=-0.72):38.Nc4. Best, Qf4, =0.00.
. = (0.00): 38.Qf4 Nbd5 39.Qg4 Nf6 40.Qh4 Bd5 41.Bd3 Bd6 42.Bc2 Rc8 43.Rac1 Na2 44.Rb1 Nc3 45.Ra1 Kh8 46.Qg3 Nh5 47.Qg4 Nf6 48.Qg3 Nh5 49.Qg4 Nf6 50.Qg3 Nh5 51.Qg4 Nf6 52.Qg3 Nh5 53.Qg4 2. = (0.00): 38.h3 Bd6 39.Qc2 Qc7 40.Bd3 Bxc5 41.dxc5 Nd7 42.Nxd7 Qxd7 43.Re3 Qc7 44.Bb5 Qxc5 45.Rxe6 Qg5 46.Be3 Qg3 47.Bf2 depth: 15 : 4 min :
White
(-#9):40.h3. Best, g3, -1.18.
White resigned after 41...Bxf3.
An even game up to 38.Nc4. |
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| Dec-15-10 | | Brandon plays: Bxf3 seems to force a win. White cannot ignore the threat and taking loses. |
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| Dec-15-10 | | Brandon plays: The really interesting things in the fact that white seemed content to shuffle around his pieces without doing anything. |
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| Dec-16-10 | | kevins55555: 41...♕h1+! 42. ♗g1 ♗h2! wins. |
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