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| Sep-16-12 | | JRMenezes: I think this game has not been perfectly played by Euwe. Chessmaster reveals a lot of flaws in the moves. Even the sac Nd4 is not recommended. |
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Sep-16-12
 | | tarek1: Here I don't see anything but a combination to win a pwn for black. Given the position of Black's queen a bishop on h3 would be extremely dangerous
threatening mate on g2.
The c8 bishop can go to h3 if we could remove the N on e6 WITH TEMPO even perhaps by sacrificing it.
However W can defend g2 with Ne3, we'll have to overcome this defense later.
So I propose :
<26...Ng5!>
With the idea of Nh3+
<27.hxg5>
Otherwise Nh3+ and Nxf2 is devastating.
Qxg5 is possible but bad, for reasons indicated below. <27...Bh3 28.Ne3>
Forced, no other move.
<28...Rxe4 29.Qd1>
With the queen on g5 W wouldn't have this move.
Now Black can win the piece back by :
<29...Rxe3 30.Qxf3 Rxf3> Black is better I don't know if he's winning but I failed to see anything else... I must be missing something. |
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Sep-16-12
| | tarek1: I had considered the move Nd4.
But after <27.Qxd4 Bh3 28.Ne3 Rxe4> white has <29.Qd1> and black has nothing betterv than regaining the piece by Rxe3 like in my main line.
The difference is the doubled pawns W has now, otherwise it's the same position.
Yet another @#$%*&!# puzzle ? |
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Sep-16-12
| | tarek1: After checking with Houdini, my move Ng5 doesn't work due to <29.Nac2>.
So <26...Nd4> that I had analysed for a long time is the move. But it only wins a pawn. |
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Sep-16-12
 | | al wazir: <tarek1>: I also went with 26...Ng5, but it fails because of 27. hxg5 Bh3 28. Ne3 Rxe4 29. Qxd6, and now if 29...Rxe3, then 29. Qd8+, with at least a perpetual. 26...Nd4 is better because it blocks the d-file, saving one tempo and doesn't let white post a  on g5. |
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Sep-16-12
 | | Eggman: Somewhere I have (seen) this before. In a dream my memory has stored ... <al wazir> In your line 29.Nac2 is pretty darn good, no? This was pointed out by <Patriot> above. |
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| Sep-16-12 | | galdur: Seems pretty forced 26...Nd4 27.Qxd4 Bh3 28.Ne3 Rxe4 29.Qd1 Rxe3 30.Qxf3 Rxf3 and black should be winning. |
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Sep-16-12
 | | An Englishman: Good Evening: The position after 29.Nxe1 is good for a double-take; t'isnt often you see both Knights attacking a Queen at the same time. |
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| Sep-16-12 | | kasputine: If white defends correctly, he doesn't get mated, though black remains with a pawn up and a superior position:
27.Qxd4 Bh3
28.Ne3 Rxe4
29.Qd1 Rxe3
30.Qxf3 Rxf3 |
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Sep-16-12
 | | Once: When I grow up, I want to be...
As good a chess player as Euwe, Morphy, Capablanca, Kasparov. Or any of the greats. So we throw ourselves into POTDs with the hope that we can find the same brilliant moves as our heroes. And sometimes, just sometimes, we might find a move that one of these megabeings missed. And when that happens, it feels like a little bit of the GM magic has rubbed off on us. We can hold heads up high, puff out our chests and say to our baffled loved ones "today I found a move that a world champion played". And they say "yes dear" in that patronising tone they often use but it can't take the shine off our achievements. Of course, it's all a dream. We might spot the combination but there's little chance that we would have got into the same position to deliver the combination. It's as if we can imitate the magician's "tadah!" but we don't know how to get the rabbit into the hat in the first place. But then along comes a Sunday, and the crushing realisation that I am not Euwe. My fondly imagined 27...Ng5 doesn't work because of 28. hxg5 Bh3 29. Ne3 Rxe4 30. Nac2. Today I'm not Euwe, I'm Stumpers. Or more correctly, Stumped. Having said that, I don't find the game continuation particularly conclusive. This is one of the line from the notes: 26... Nd4 27.Qxd4 Bh3 28.Ne3 Rxe4 29.Qd2 Rxe3 30.fxe3 Qxg3+ 31.Kh1 Bg2 
click for larger viewWe can roll this on a few moves because of the forcing nature of the position: 32. Qxg2 Qxe1+ (Qxh4+ transposes) 33. Qg1 Qxh4+ 
click for larger viewNow the path splits because white has two ways to evade the check and black has two ways to win another pawn. It doesn't really matter. What matters is that we enter an endgame of queen and 6 prawns versus queen, knight and 2. Fritzie (not at his best in endgames) is calling this position -2.33. I suppose black would win eventually, but it's not what you would call a clean kill. |
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| Sep-16-12 | | thomastonk: <Once: I suppose black would win eventually, but it's not what you would call a clean kill.> Maybe White can even do better: instead of 29.Qd2 in your line, 29.Qd1 Rxe3 30.Qxf3 Rxf3 and Black is just one pawn ahead. But it's Sunday, the insane puzzle day. |
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| Sep-16-12 | | gofer: Initially, I thought that was indeed Insane, black's pieces seems too
passive to really do much. Then we notice that if we can play Bh3 then
mate is unavoidable. So all we need to do is move Ne6 somewhere. 26 ... Nf5
27 Qxf5
nope
26 ... Nc5
27 Nh7
nope
26 ... Nd4
27 Nh7 Rxe4
28 Re3 Qxe3 (Nxf3 Nxf3+  )
29 Qxe3 Rxe3
30 fxe3
nope
So that just leaves the interesting one!
<26 Ng5! ...>
27 Qxg5 Bh3 mating
27 hxg5 Bh3 mating
27 Nh7 Nh3+
28 Kf1 Qh1+
29 Ke2 Qxe4+!
30 Kd1 Qb1+ (30 Qe3? Qxc4+  but the alternative is a mate!)
31 Nxf2+ Kd2
32 Qd3#
27 Ne3 Nh3+
28 Kh2 Nxf2
29 Qe2 Qxe2 (Rf1/Rg1 Qxe3+!)
30 Rxe3 Rxe4!
The two pawn advantage should be enough for a win.
27 Re3 Nh3+
28 Kh2 Qxf2+
29 Qxf2 Nxf2
30 Kg2 Nxe4
It was at this point that I had a brain-wave. If Ne3 saves black from mate then
my original assumption that <26 Ng5> is/was playable crumbles into dust. So then
I gave up, <in a huff> and looked at the POTD. ~~~
So only an hour wasted and not more. In some respects better than it could have been. I could have been here all day! |
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Sep-16-12
 | | chrisowen: Mind urchin technique sterling! 26 ...Ng5 ow ledge in 360 queen takes and hole g2 covered by e3 sardines to a steeda1 live in c2 backing e3 now castle on e8 poled axe 1st barrier g2 offer second knight reinforced mater in g2 after bh3 and f13e so pine fab le6 go for free tendency another do the - math le6, feel a d4 destined for e2 sheep perchance nh2? bream rook edge re4? in bh3 gulley escry light rook in work it Nxf3 Nxf3+ total it domination kingh1 in Nxd2 piece up ride cresting ascent. Again manage in d4 what about it her in haggles 27.Qxd4 then Bh3 as hats off to you sir ding dong battle you ride in evermore 28.Ne3 Rxe4 29.Qd1 Rxe3 30.Qxf3 Rxf3 see lack etc lane black is up a pawn and rook has fill in gobble cold bets pawns it soon to b4 c4 or e3 ar corner eyes king to penetrate win on the cards comeback to sleep perchance to dream sak in g3 at e2+ king fantails over sat I le1 proof that sting in make or bake it hawk in 30...Nxg3+! he bludgeon it h3 in when seemingly 31.Kg1 Qh1 in clean pair of heel sold! |
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Sep-16-12
 | | David2009: L Stumpers vs Euwe, 1946 Black 26? Try 34...Nd4 GOOT! seeing 35.Qxd4 Bh3 36.Ne3 Rxe4 GOOT 2! (the N on e3 and Q on d4 are forked). Since black was Dr Euwe his play must be perfectly sane. Time to check and find what I have missed.
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Well I got the start of the main variation but missed much detail, in particular that after 27.Qxd4 Bh3 28.Ne3 Rxe4 29.Qd2 Rxe3! 30.fxe3! protecting the mate. If you can't be good be lucky - 30...Qxg3+ 31.Kh1 Bg2!! wins. I suppose I always had at least a perpetual check. Here's the puzzle position
click for larger view
colours reversed
click for larger view (Stumpers vs Euwe 1946 colours reversed 27...?) linked to Crafty End Game Trainer:
http://www.chessvideos.tv/endgame-t... The accurate robot defends with the colours-reversed equivalent of the 29.Qd1! line bailing out into
an ending a Pawn down and, sadly, the limitations of my end-game technique are exposed yet again. First time round I have R + B versus R + N and an extra protected passed Pawn - but the EGT has set up a secure fortress and I am about to accept the draw by repetition (I can't progress without jettisoning my extra P). Over to you to do better. |
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| Sep-16-12 | | Abulherar: Maybe 26...Nd4! (N sac) is the best move for black because it opens the black
bishop's way to (h3) and the black rook's
way to the white pawn on e4. |
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Sep-16-12
 | | FSR: Wow. I too was Stumped. I saw 26...Nd4, but dismissed it because of 27.Qxd4 Bh3 28.Ne3 Rxe4 29.Qd2 Rxe3 30.fxe3. I didn't think of 30...Qxg3+ 31.Kh1 Bg2+!, and probably would have rejected it as too unclear if I had. As <Once> says, probably an eventual win, but not a clean kill. |
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Sep-16-12
 | | Stonehenge: Pity he missed 30...Nxg3+ |
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Sep-16-12
 | | morfishine: Euwe "Stumps" White with <26...Nd4> (A) If now <27.Qxd4> then <27...Bh3 28.Ne3 Rxe4
29.N1c2 Rxd4 30.Nxd4 Qf6 31.N4c2 Bf5> with a technically won
game for Black (Black will be able to eliminate one knight then
penetrate the Queen to <c3>) Does White have time to decline the offer?
(B.1) <27.Nc2 Bh3 28.N1e3 Nxc2 29.Qxc2 Rxe4 30.Qd2 Rxe3
31.fxe3 Qxg3+ 32.Kh1 Qxh4> I'm missing something here (B.2) Black can sac his Queen after 27.Nc2 Bh3 28.N1e3 with
<28...Qg2+> forcing <29.Nxg2 Nf3+ 30.Kh1/f1 Bxg2+ 31.Kxg2
Nxd2> White will lose either the e or c-pawn giving Black a
big advantage in the endgame:
click for larger view**[The White defense starting with <27.Nh2> stumped me. I was
certain White had to place a knight on <e3> supported by the
other knight on <c2> to have any hope] |
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| Sep-16-12 | | Dr. J: In the annotation at move 27, <cg> gives <27.Qxd4 Bh3 28.Ne3 Rxe4 29.Qd2 [29.Qd1 Rxe3 30.Qxf3 Rxe3  ] Rxe3! 30.fxe3 Qxg3+ 31.Kh1 Bg2!! > I'm pretty sure the last move is supposed to be 31...Bg4. |
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Sep-16-12
| | FSR: <Dr. J> Why do you say that? I think 31...Bg2+ really was intended, with the further continuation 32.Qxg2 (32.Kg1? Bf3+! 33.Kf1 Qh3+! 34.Kg1 Qh1+ 35.Kf2 Qg2#) Qxe1+ 33.Qg1 Qxh4+ and 34...Qxc4, when Black has four pawns for the knight and should eventually win. |
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Sep-16-12
 | | agb2002: Black has a bishop for a knight.
The pawn on d6 is hanging.
Black would like to find a place for the knight so that it could create some threats to combine with Bh3. The first option coming to mind is 26... Nd4, with multiple threats (Bh3, Qf6-Nf3+, Rxe4) and controlling c2, the square which the knight on a1 might use to support his colleague after an eventual Nf1-e3: A) 27.Qxd4 Bh3 28.Ne3 Rxe4
A.1) 29.Qxd6 Rxe3 30.Qd8+ (30.fxe3 Qg2#) 30... Kg7 31.Qd4+ f6 32.Qd7+ Bxd7 33.Rxe3 Qd1+, etc. A.2) 29.Qxe4 Qxe4 30.Rc1 d5 - +.
B) 27.Re3 Bh3 28.Rxf3 Nxf3+ 29.Kh1 Nxd2 30.Nxd2 Ra8 - + [R+B vs 2N], and Black should win the endgame. C) 27.Nh2 Bh3 28.Nxf3 Nxf3+ 29.Kh1 Nxd2 - + [B].
D) 27.Qe3 Bh3 29.Qxf3 Nxf3+ 29.Kh1 Nxe1 - + [R+B vs N]. E) 27.Qd1 Bh3 29.Ne3 Rxe4 looks bad for White.
F) 27.Nc2 Nxc2 28.Qxc2 Bh3 29.Ne3 Rxe4
F.1) 30.Qe2 Rxe3 31.fxe3 (31.Qxe3 Qg2#; 31.Qxf3 Rxf3 - + [B+P]) 31... Qxg3+ 32.Kh1 Bg4 - +. F.2) 30.Re2 Rxe3 31.fxe3 Qxg3+ 32.Kh1 Bg4 and Black will end up with two extra pawns. |
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Sep-16-12
| | FSR: <Stonehenge: Pity he missed 30...Nxg3+> Good point. Euwe's 30...Bh3+(?) won, but 30...Nxg3+ would have mated next move. |
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| Sep-16-12 | | Dr. J: <FSR> It seems you're right. I thought 31...Bg4 forced 32 Qg2, but White does better with 32 Rf1, and he's better off than in your line. But I'd want to check that against Crafty, and I can't do that now. Have fun. |
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Sep-16-12
 | | Garech: 27.Bh3!
Great game - a few inaccuracies, but that's chess. Not that hardest of Sunday problems, in my opinion - not that I solved it though! Cheers,
-Garech |
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| Sep-16-12 | | Feuertrunken: My first 7/7, after I managed to come to the site every day of the week! :)
Nd4 was not that hard to find but calculating all possible variations took quite some time :P |
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