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Later Kibitzing> |
| Jan-02-13 | | mistreaver: Black to play. 23...?Medium/Easy.
After looking at the position for a while,i can't find the exact way
for black to use the lethatl battery on the white h1-a8 diagonal.
So let's see:
a)
23... Ng5
24 Bxf3 Bxf3
25 Kf1 leads nowhere.
The primitive:
b)
23...Nxc3
24 Bxf3 and now both
b1) 24...Bxf3
25 Rxc3
and
b2) 24... Nxa2
25 Rxb7 don't bring Black much joy.
c) 23... Qxg2+
24 Kxg2 Nxc3+
and..25 ...Nxa2
seems best, leaving black with a piece up.
Time to check.
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Got it only on third attempt. |
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| Jan-02-13 | | DarthStapler: Got it |
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| Jan-02-13 | | Bartimaeus: <agb2002: A) 25.Kf(g)1 Rb1#> Doesn't seem correct.
25. Kf(g)1 Rb1+? 26. Qxb1 Nxb1 27. Rxb7 and in essence its lost for Black. |
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| Jan-02-13 | | whiteshark: For some reason - god moves in mysterious ways - I was loo♔ for a #. That was quite futile. |
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| Jan-02-13 | | gofer: A nice simple combo...
Qxg2+ Kxg2
Nxc3+ Rxb7
Nxa2 Ra7
Rb2 
~~~
I was wondering if there was anything better, but no there wasn't... |
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| Jan-02-13 | | zb2cr: Black emerges a piece up after 23. ... Qxg2+; 24. Kxg2, Nxc3+. Key point: Black has taken a second piece with this move, and thus even after 25. Rxb7, Nxa2 he is still a piece ahead. |
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| Jan-02-13 | | Castleinthesky: A nice demonstration of discovered checks and knight forks-the stuff of tactics. |
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Jan-02-13
 | | gawain: Very Mondayish for a Wednesday puzzle. The solution is to toss the queen, temporarily. 23...Qxg2+ 24 Kxg2 Nxc3+ and it all works out nicely leaving Black up a piece. |
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| Jan-02-13 | | 12.12.12: i tried to look for a mate then suddenly it hit me. it's not the droid i was looking for. |
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| Jan-02-13 | | snakebyt: No easy solution! Tried -Nxc3 and -NXf2 even -b4a4 all only end in frustration. Didn't even think to sac the Q to end one up. |
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| Jan-02-13 | | kevin86: Saw this one even faster than yesterday's. Black sacs queen and picks up a couple of pieces to end a piece ahead. |
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| Jan-02-13 | | Oxspawn: Black is a pawn up but the black queen is under threat and if the queen moves then the knight is under a double attack.
<23. Nxc3
24. Bxf3 Nxa2
25. Bxb2 > does not seem to give black any advantage and gives white a promising attack (which is a way of saying 'I don't see what happens next but would rather play white')However, black has a more active way to sacrifice the queen , even though it is not Monday.
<23. Qxg2+
24. Kxg2 Nxc3> discovered check
I don’t seen anything better for white than
<25. Rxb7 Nxa2>
Which seem to leave black a piece to the good. Maybe there is something more decisive, but this harmonises with the theme of the week for strong bishops and knights. So, this is my post. |
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| Jan-02-13 | | Oxspawn: Wow. A whole year of getting things right (well, up to January 2 anyway) is going to my head. It's Wednesday and I saw it so <gawain>, please don't call it 'Mondayish' and burst my bubble of pride. POTD will arrange that for tomorrow no doubt. |
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| Jan-02-13 | | Patriot: <<Castleinthesky>: A nice demonstration of discovered checks and knight forks-the stuff of tactics.> Yes it is! It's also a multi-square counting problem. I had to look at it again to see exactly what, if anything, white was winning. NM Dan Heisman identifies 'counting' as a basic tactic. Even though it is never discussed in books (except Heisman), it is a very common mistake for a beginner to miscount and drop a piece or pawn in simple positions. Of course, every kind of tactic can occur at the top levels but that's usually a result of a superior position. |
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| Jan-02-13 | | Marmot PFL: Isn't this a little too easy for Wednesday? Maybe not, if a 2500 player missed it. Of course there was more to it than that, as white is probably lost even without 23 Bg2, as 19 dc5 Bxc5 leaves the Ra7 without a good square. 13 Ra7 was a wasted move to begin with and the QN should have come out instead. <These are the opinions of a (former) Catalan player.> |
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Jan-02-13
 | | chrisowen: Eg clean aid a bet it ok in fly it low 23...Qxg2+ struggle to wrest in le gal fall on her sword in g2 odds in blacks will peg back material urge in also 24...Nxc3+ ok catch 25.Rxb7 Nxa2 solve it fetch in knight up select a c3 tick too f3 in bat mind rake over b2 at i melee kaputz enact in time it is g2 often ya done in ado it brought in body 20.Rxc5 skeptical. Zone you see at bow astern your nose in qf3 runt affray knighte4 in baddy it dog in c3 dig took g2 question off a fashion in a2 success now band-aid bishop rook body na mowing 26.ra7 tonic ointment rook glib b2. |
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| Jan-02-13 | | David2009: M Konopka vs P Haba, 1998 Black 23...? Black grabs material with 23...Qxg2+ 24.Kxg2 Nxc3+ 25.Rxb7 Nxa2 when 26.Rxg4 fails to 26...Nxb4. <Oxspawn: Wow. A whole year of getting things right (well, up to January 2 anyway)> Nice! :=) |
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| Jan-02-13 | | Patriot: <Marmot PFL> <13 Ra7 was a wasted move to begin with and the QN should have come out instead.> After looking at the position I thought you were probably right. Then I plugged it into Houdini and it says 13.Nc3 is much better. Black has a very slight edge to equal position, but with 13.Ra7 black is almost winning. I'm sure the 2500 player knows about opening principles such as "move every piece once (unless there's a tactic)". This is a GM out-smarting himself. |
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Jan-02-13
 | | Phony Benoni: The knight is usually described as a short-range piece, but it's amazing how much ground one can cover with a check or two as a head start. Here's a couple of situations from games not in the database. First <Wright - Wilson, Detroit, 1990>:
click for larger viewBlack has a multitude of good moves here, but he chose the amusing <34...Nf2>. This threatens both rooks: the one on h1 directly, and the one on a2 by 35...Ne4+ 36.Kd1 Nc3+. 
click for larger viewOne of my old correspondence games, which admittedly look a lot like my current correspondence games. Again Black has a multitude of ways to win, but I couldn't resist the inferior <20...Nf4>, praying for the line 21.Qxf3 Nxg2 22.Qxe3 Nxe3+ followed by 23...Nxc2 and 24...Nxa1, in which the knight leaps from h5 to a1 in five mighty bounds and captures bishop, queen, and both rooks along the way. Alas, White avoided this obviously awful line, but Black's position was good enough for me to win anyway. |
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Jan-02-13
 | | LoveThatJoker: 23...QxB+! 24. KxQ NxN+ 25. RxB NxQ wins for Black.
For example,
A) 26. RxR NxR 
B) 26. R-R7 R-N7 27. R(B5)-R5 N-B3 28. R-R8 P-N3
LTJ |
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| Jan-02-13 | | 20MovesAhead: fokers13
well spotted ! 23... Rb1 not only wins a pawn but leaves black with winning threats after 24.Nb1 Qd1 25.Bf1 Nc5, namely ...Qf3 and ...Ba6 |
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| Jan-02-13 | | BOSTER: <Patriot> <Counting as a basic tactic>. Here in the pos.(see diagram) white to play move 22, even with a piece up, white "discovered" that their two knights and rook c5 in the air. 
click for larger view It is not so easy to be cool in such pos. He played 22.Nc3 offering black take three of them (like in childish puzzle-touch three pieces with one move) and lost the game. But if he first played 22. Rxb7 Rxb7 23.Nc3 now if Qxf3 24.Bg2 Nxc3 25.Bxf3 Nxa2 26.Bxb7 or 22.Rxb7 Rxb7 23. Nc3 Nxc3 24.Rxc3 Rb1 25. Nd2 Rd8 26.Kg2 and black can't take the knight on d2 because the mate Rc8#, and game is equal. |
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Jan-02-13
| | Phony Benoni: Sort of incidental, but I assume everybody saw Black's winning line after 23...Rb1+ 24.Bf1.
click for larger viewRight? |
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| Jan-02-13 | | Kikoman: 23. ...Qxg2+! 24. Kxg2 Nxc3+ 25. Rxb7 Nxa2 26. Rxb4 Nxb4 and Black is piece up. :D |
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| Jan-02-13 | | Reggie T: <Phony Benoni: Sort of incidental, but I assume everybody saw Black's winning line after 23...Rb1+ 24.Bf1.> 24...Ng5 and the double threat of 25...Qh1# or Nh3# is imparable or a force mate in 3 with 24...Qh1+ 25. Kxh1 Nxf2++ 26. Kg1 Nh3# (or 25...Nxg3++ 26. Kg1 Rxf1#) |
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Kibitzing
sac: 23...Qxg2+