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Later Kibitzing> |
| Feb-01-09 | | MarbleSkull: I saw Rxe5 easily enough, but wasn't sure if black is better off accepting the sacrifice or going Qd8. It made it difficult to calculate much further on ahead. I'm confidant that I wouldn't have seen 36. g4, that's probably why this puzzle is rated insane. Good and complicated, I liked this one because there are many plausible paths to puzzle over, but it looks like only one line forces the mate against an astute defender. |
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| Feb-01-09 | | Terry McCracken: Rxe5!! and the fun begins, much easier than yesterday as this is a forced combination. |
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| Feb-01-09 | | Guguni: I saw 28. R:e5, but after 29...Ke8 I continued 30. Nxd7 Kxd7 and 31 Q f6 with the double threat of Q e7+ and Qf7+, either returning the sacrificed knight, or getting the pawn queened. The line here in the game does not look compulsory enough to me, but of course I will not argue with the grandmasters :-) |
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| Feb-01-09 | | costachess: 28 ... Qb6 |
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| Feb-01-09 | | dzechiel: White to move (28?). Material even. "Insane."
OK, I'm going to shoot from the hip here. After about 30 seconds I want to play 28 Rxe5
winning a pawn and attacking the queen. If black doesn't want to be a pawn down with a passive position, he needs to play 28...fxe5 29 Nxe5+
Forking king and rook, threatening to get his rook back and be two pawns ahead. 29...Ke1 30 Nxd7 Kxd7 31 Qxf6
White now has two pawns for the knight, and is threatening 32 Qe7+ and 33 Qxe6 recovering the piece. 31...Re8 32 Qf7+
On the king, the rook and the knight. The only way to hold everything together is 32...Kd8 33 d7
Now threatening the killer 34 dxe1=Q#.
33...Re7
This holds the knight on the board.
34 Qg8+ Kc7 35 Qd8+ Kb6 36 d8=Q+ Nxd8 37 Qxd8+ Rc7
and I'm sure there's some way to win that rook, but I can't see it without setting up a board (which I'm going to do now). OK, after setting this up on a board, I found that
36 Rd6+
is much better than 36 d8=Q+. After
36...Ka7 37 Rxd6 Rxd6 38 d8=Q
white has an overwhelming game. I also noticed that black has better moves than 31...Re8, he should probably move the knight somewhere rather than protect it. That's all the time I'm spending tonight, I hope I'm close. Time to check. |
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| Feb-01-09 | | whitebeach: Well, I must say I saw pretty much all of it up to 36. g4 (I don't count the repetition of moves, which I assume meant white was in a bit of time trouble). It seemed to me that once white got the queen to the eighth with check and then brought the rook in, he couldn't lose in any case--at the worst he has perpetual with the knight. And I don't think it would have been very hard to find g4 once this line was entered upon (and I would certainly have entered it OTB). In other words, as someone who rarely solves the "Insane" puzzles, I didn't think this one was really "Insane." |
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Feb-01-09
 | | al wazir: I would have played 28. Rxe5 fxe5 29. Nxe5+ Ke8, but I would have captured the ♖ next with 30. Nxd7, and if 30...Kxd7, then 31. Qf6. If now 31...Qd8, defending e7, then 32. Qf7+ wins the ♘, and white is two ♙s up with an advanced passer. If instead black moves the ♘, then 32. Qe7+, and I've got to believe there's a win here. |
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Feb-01-09
 | | An Englishman: Good Evening: I saw the game continuation until 32...Kf7, when I decided that 33.Nxb8 was best (it's clearly 2nd best at best). But I also saw <dzchiel's> line up through 30.Qf6 with two pawns for the Knight and a huge attack, and couldn't decide which line was better. |
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| Feb-01-09 | | nfazli: 34.Qf6 |
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| Feb-01-09 | | SamAtoms1980: OH MAN. The first thing I saw was 28 Nxe5+ fxe5 29 Rxe5 with an unbalanced position. Then I switched to 28 Rxe5 fxe5 29 Nxe5+ but I didn't see anything that looked good after winning the exchange back. So I finally went with Nxe5+ and it turns out that you have to take it with the rook after all. Didn't see 30 Nc6. AAARRGH, I was so close, if I'd given this 15-20 minutes then I could have had it. |
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| Feb-01-09 | | crwynn: I only looked at 30...Qb6, where I saw the idea of getting a discovered check by Ne5 as in the game, with the q on b6 this means nc4 will win. I thought there was no point in looking at lines where Black hangs b8, but in the game 33.Nb8 Rd6 actually looks bad for White. |
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| Feb-01-09 | | Samagonka: I got the first move surprisingly quick, the rest is too long a combination for me. |
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| Feb-01-09 | | Granny O Doul: 37. Nf3+ is a bit simpler and quicker. |
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Feb-01-09
 | | Open Defence: I didnt find this as insane and the usual week end ones |
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| Feb-01-09 | | FabrikaLaHun: I think it was pretty easy to see the focus of the attack would be on e5. Choosing which piece to attack with was the lesson I learned here. I liked 28 Nxe5+ b/c it is forcing but after ...fxe5 and 29 Rxe5 it seems the attack stalls. What I liked about the played line was moves 30 Nc6 with the fork of rook and Queen (which I didn't see from the initial puzzle position), Black's response of 30...Qh5 saving both his queen and getting back his rook if white takes at b8 and then 31.Qh8+. I'll have to admit that OTB, after 32.Re1+ removes the rook from the Black Queen's sights, I would have taken my Rook back with 33.Nxb8. |
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| Feb-01-09 | | tallinn: <whitebeach: up to g4> Interestingly enough g4?! is not the best move as white has a forced mate in that position starting with Qf6, the threat being Nxg6+ and Qf8#. Black can prolong its agony by throwing pieces at white only: Qd1 Rxd1 Ne6 Qxe6 Kf8 Nxd7 and so on. g4 is not even second best: Nxd7 and Qg8 are better as well. After g4 Qxh3? white missed another forced mate starting with Nf3+ (Kf7? Ng5#) Re7 Rxe7+ Kd8 Qxf8#. Although Nc6 is stronger, Rxe5 fxe Nxe5 Ke8 Nxd7 Kxd7 Qf6 wins as well. Thus this problem is rather easily solved. Blacks best defense on Rxe5 is not to take: Rxe5 Qb6 and now the best move Red5 gives an evaluation of +0.92 only. |
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| Feb-01-09 | | melianis: I'm silent before this. |
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| Feb-01-09 | | johnlspouge: Sunday (Insane):
O Garcia vs J M Bellon Lopez, 2001 (28.?) White to play and win.
Material: Even. The Black Kf7 has 4 legal moves. White has an advanced passed Pd6 backed by Rd1. The White Re4 is on a semi-open file and a semi-open rank. The White Qb2, Re4, and Nf3 attack Pe5, which is protected by Qa5 and Pf6. Because the Black Qa5 and Rb8 are distant, a sacrificial attack against Pe5 might be based on local superiority around the Black K-position. The Black Kf7 would then be open, and all Black pieces except Ne6 are loose and susceptible to Q forks. The Black Qa5 is somewhat cramped, with only 3 flight squares. The White Kg1 is secure from checks. Candidates (28.): Nxe5+, Ng5+, Rxe5
The N is better left standing at e5 than the R, because White then has a strong initiative against the open Black K. 28.Rxe5 fxe5 [else, drop a P]
29.Nxe5+ Ke8 [else, drop 2Ps after 30.Nxd7]
<[I went for 30.Nxd7, which Toga evaluates at about +2.0 Ps, not as good as the game variation 30.Nc6, but still winning.]> 30.Nxd7 Kxd7 31.Qf6 (threatening 32.Qe7+ 33.Qxe6)
Because counterattack is infeasible, Black must reinforce or move Ne6 (feasibly, only to d8 or c5). (1) 31…Re8 32.Qf7+ Kd8 33.d7 (threatening 34.dxe8=Q# and 35.Qxe6) 33…Re7 34.Qg8+ Kc7 35.Qxe6 (threatening 36.d8=Q+ 37.Qxa5) Black is down at least a Q.
(2) 31…Nd8 32.Qe7+ Kc6 [Kc8 33.Rc1+] 33.Rc1+ Kd4 34.Qc7 34…Qb6 [else, drop material] 35.Rd1+
35…K to e-file 36.Qe7+ Ne6 [Kf5 37.Rd5#] [Kf3 37.Rd3+ Qe3 38.Rxe3#] 37.Re1+ and Black is down 2P after 38.Qxe6
<[Toga gives the next variation as best play after 30.Nxd7, up to 34.Qd6+, when it prefers 34.Nd6+.]> (3) 31…Nc5 32.Qe7+ Kc6 [Kc8 33.d7+] 33.d7 Rd8 34.Qd6+ Kb7 35.Rd5 35…Rxd7 36.Rxc5
White has won a P.
(4) 31…Qf5 32.Qe7+ Kc6 [Kc8 33.d7+ then 34.d8=Q+]
33.d7 (threatening 34.Rd6+ Kc5 [Kb7 or Kc7 35.d8=Q+] 35.Rxe6+) (4.1) 33…Nd8 34.Qd6+ Kb7 35.Rc1 (threatening 36.Rc7+ 37.Qxa6#) 35…Ka7 36.Qc7+ Nb7 [Rb7 37.Qxd8] 37.a5 (threatening 38.Qb6+ 39.Qxa6#] There is no antidote.
(4.2) 33…Qe5 34.d8=Q Rxd8 35.Rxd8 Qa1+ 36.Kh2 Nxd8 37.Qxd8 White wins a P and is likely to win against the open Black K and the remaining weak Ps. |
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| Feb-01-09 | | Confuse: In my opinion, 34. Nxg6+ leads to a happier line... but it all wins, so whatever : ) neat. |
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| Feb-01-09 | | agb2002: The first move I considered was 28.Nxe5+ but 28.Rxe5 seems stronger: A) 28... fxe5 29.Nxe5+
A.1) 29... Qxe5 30.Qxe5 followed by Rd3-f3.
A.2) 29... Ke8 30.Nc6
A.2.a) 30... Qb6 31.Qh8+ Nf8 (31... Kf7 32.Ne5#) 32.Re1+ Re7 33.Rxe7#. A.2.b) 30... Rxd6 31.Rxd6 Qb6 32.Qh8+ Nf8 (32... Kf7 33.Rd7#) 33.Qe5+ Kf7 34.Rf6+ Kg7 (34... Kg8 35.Ne7+) 35.Rxf8+ Kxf8 36.Qf6+ and mate next move. A.3) 29... Kg8 30.Nxd7 Rd8 31.Qf6 Rxd7 32.Qxe6+ Rf7 33.d7 winning. A.4) 29... Kf8 30.Nxd7+ and 31.Nxb8  .
B) 28... Qxe5 29.Nxe5+ fxe5 30.Qxe5 as A.1).
C) 28... Qb6 29.Red5 Rbd8 30.Qd2 and White is at least pawn ahead. This is all I have today (I’ve been watching Wang Yue vs Carlsen, 2009). |
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| Feb-01-09 | | drnooo: Right, hardly insane. In fact way down the line doesnt queen takes knight, king takes queen, knight takes rook check then knight takes the other rook in a series of forks also win: if so this is doubly not insane. |
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| Feb-01-09 | | vijaymathslpjz: oh my @#$%in god..........this is insane indeed.first time im trying an insane puzzle...too much i say |
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| Feb-01-09 | | drnooo: on the 34th move, now that I double check, queen takes knight wins the house also:in fact this one is a good deal easier than some of the thurs or fridays, but still pleasant |
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| Feb-01-09 | | drnooo: In fact now that I triple check, on the 34th after queen takes knight, g4 doesnt even come into play, this looks like an even shorter solution, right? pawn goes to the seventh and black has to turn over his king |
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| Feb-01-09 | | jovack: Knight or Rook to e5 was very apparent. Taking with the rook first has a more interesting game. |
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Kibitzing
sac: 28.Rxe5