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Jun-12-09
 | | Domdaniel: You want that Queen on g3. And ...Be1 gets it there. Simple, really. |
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| Jun-12-09 | | Patriot: 24...Be1 certainly looks like the move.
if 25.Rxe1 Rf2+ 26.Kh3 R7f3+ (26.Kg1 Qg3+ 27.Ng2 Qxg2#) 27.Nxf3 Rxf3+ 28.Kh4 Qg3# (28.Kg2 Qg3#). The best response seems to be 25.Rxf6.
25.Rxf6 Qg3+ (What else? Not 25...Rxf6 26.Rxe1) 26.Kf1 Rxf6+ 27.Ke2 This is where I started to run short of ideas and time, missing 27...Nb4 completely. If I had this position in a 30-minute game, I would definitely give Be1 a try because a little calculation shows that 1) it's safe and 2)black gains initiative. |
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| Jun-12-09 | | smalldreams: This is the first puzzle on this site that I got "right," having failed many vastly easier ones. And I only spent five minutes on it. Weird. |
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| Jun-12-09 | | JG27Pyth: JohnLSpouge <I missed the game defense, as usual. I recognized the candidate rapidly today, because I analyze for loose pieces (Nh4) and pieces that require activation (Bb4).> Ditto. And same method :) But I didn't see your (3) 25.e4 -- interesting line... everything loses, so it's all academic I suppose, but the text defense just looks -- pre-calculation -- like it has to be bad... 25. e4 is a more interesting try IMO. |
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| Jun-12-09 | | hedgeh0g: 5/5 for me! |
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Jun-12-09
 | | Jimfromprovidence: It's too bad white did not see 24 Bc2.
click for larger viewNow he has a counterattcking threat, seeing Qh7+ followed by Bg6. |
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| Jun-12-09 | | felixd: Wow that was easy :D
I found it in 10 seconds. |
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| Jun-12-09 | | Waitaka: I got 24...Be1 25.Rxf6 Qg3+ 26.Kf1 Rxf6+ 27.Ke2.
Then I looked to 27...Nb4 and did not consider it because of 27.Qb5 or other possible Q moves. So I thought of 27.Rf2+ Rd1 28.Rd2+ winning the Q (if 27...Kxe1, 28.Rd2+, also winning the Q) |
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Jun-12-09
 | | kevin86: What a startling finish! The queen is forced to move to the only would -be escape square of her king---or abandon the king and allow a mate. eg,28 ♕d1 ♕f2# or 28 ♕b5 ♕f2+ 29 ♔d1 ♕d2#.
I solved this one from the start. |
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| Jun-12-09 | | gofer: Hi <stukkenjager>, my personal favourite for making the line... 24...Be1! 25.e4? Rf2+ 26.Rxf2 (26.Kh3 Rd2) (26.Kg1 Rxf1+ 27.Qxf1 Qg3+) 26...Rxf2+ 27.Kh3 (27.Kg1 Nxd4) 27...Nxd4 a little slower in reaching its conclusion is
28 Bxd5
Yes white loses the queen for a rook, and from that point on is losing, but humour me... 28 ... Rf3+
29 Qxf3 Nxf3
...
30 Nf5 does look as though black at least has to stop and think for a second... ...or maybe a a couple of seconds... So perhaps the obvious
28 ... exd5 is better for black...
But
29 Nf5 still has to make him think...
:-) |
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| Jun-12-09 | | njchess: White's king is exposed along the f-file, which is only loosely guarded by White's rook, and via the h2-b8 diagonal. Black shouldn't exchange as that would only diffuse his attack. I like Be1 since it forces White to exchange his active rook or fall into a mating net. 24. ... Be1! 25. Rxf6 (best?) Qg3+ 26. Kf1 ▢ Rxf6+ 27. Ke2 ▢ At this point, it looked like White's king would escape via Kd1, and Black's attack would fizzle. Moreover, Black has not achieved a clearly winning position despite my efforts. Then, I finally found 27. ... Nb4!!. This is a subtle, crushing move that probably forces White to resign. Time to check.
As for the game, 13. Kf1? stands out like a sore thumb. White already knows that Black will castle kingside, and will eventually open up the f-file via f6 or f5 to attack the center, so castling kingside too would seem to be prudent. True, White does gain a tempo by not castling. But without concrete attacking opportunities, this tempo gain is less important than the safety of one's king. An additional problem with 13. Kf1? is that it leaves Black with an active dark squared bishop, while both of White's bishops have little scope. Better would have been 13. Bd2 Bxd2 14. Qxd2 0-0 15. 0-0 =. After 13. Kf1?, White is essentially committed to a king side attack if he hopes to win the game (yet another reason why this move is dubious). However, Black is well positioned to defend, and to counterattack. By 24. ... Be1!, the role of the bishops could not be more clear. Still, it took some creative play from Black to bring home the win. |
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| Jun-12-09 | | jheiner: 24. Black to move.
Material equality. Opposite colored B. Black has good pressure on the White K, and in particular, the dark squares around the K are weak. White Q is loose. White has no immediate checks or threats. Observation: If g3 were protected, Black would have a Gueridon's mate. Black can force liquidation of the rooks on f1. Candidates: Qg3+, Rxf1, Be1
A quick analysis of the first two don't lead anywhere. For the latter, White can throw away material to defend, but the main lines lose. 24...Be1 (threatening 25...Qg3#)
25.Rh3 Rxf1 (wins a R)
25.Rf3 Rxf3 26.Nxf3?? Qg3# (wins a R)
25.Rxe1 Rf2+ 26.Kh3 R7f3+ 27.Nxf3 Rxf3+ 28.Kg2 Qg3#
Time to check. |
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| Jun-12-09 | | jheiner: Ah, missed the e4 defense.
Agree with DomDaniel that I would have played this OTB. The decision point for me was primarily that W had no good counterplay, no checks or latent threats. White is really passive in this position. Even the simplistic: 24...Rxf1 25.Rxf1 Rxf1 26.Kxf1 Qh2 27.Ng6 (what else?) Qxb2/Qh3+/etc wins some material. |
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| Jun-12-09 | | morfishine: Doesn't white hold with the interference move 25.Nf5? |
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| Jun-12-09 | | YouRang: I rather surprised myself by getting this one. :-)
After a few foiled king-attack plans, I noticed that the Nh4 couldn't really go anywhere. I considered attacking it with 24...g5, but 25.hxg6 e.p. killed that. Just as a lark, I considered attacking it with 24...Be1 (considering that ...Bxh4 can't be answered by Rxh4 due to ...Rxf1), and noticed that white couldn't simply take it with 25.Rxe1 due to the spiffy mate: 25...Rf2+! 26.Kh3 R7f3+ 27.Nxf3 Rxf3+ and then either 28.Kg2 or 28.Kh4 is answered by 28...Qg3#. That's when I felt I was onto something. Now, what if 25.Rxf6 is played? That opens the door for 25...Qg3+, which looks deadly -- and upon further investigation, I found that it was: I saw 26.Kf1 Rxf6+ 27.Ke2, but here I missed 27...Nb4 and settled for 27...Rf2+. If 28.Kxe1 then 28...Rh2+ 29.Kd1 Rxh1+; and if 28...Kd1 then 29.Rd2+ wins the queen (for a R+B). |
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| Jun-12-09 | | YouRang: <morfishine: Doesn't white hold with the interference move 25.Nf5?> I don't think it does, but your question makes me realize this puzzle is more complex than I thought. If 25...Rxf5, black threatens ...Qg3#. If 26.Rxe1, then 25...Rf2+ 26.Kh3 R7f3+ 27.Kh4 Qg3# |
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| Jun-12-09 | | anupam.mukherjee: Awesome, first Friday puzzle. I guess its all about diligently following up. Last two puzzles, its been about using mate threats forked with piece/positional threats. Cool. |
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| Jun-12-09 | | 5hrsolver: < morfishine: Doesn't white hold with the interference move 25.Nf5?> as an addition to YouRang analysis..
25.Nf5 Rxf5 26.Rxf5 Qg3+ 27.Kf1 Rxf5+ 28.Ke2 Nb4 and black wins |
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| Jun-12-09 | | akapovsky: my solution is 1.Be1 Rxf6
2.Qg3 Kf1
3.Rxf6+ Ke2
4.<Rf2> Ke1(or lose the queen)
5.Rh2+ Kd1
6.Rxh1+ Kc2
7.Qxh4 now in the game he played 4.Nb4 but is there anything wrong in my analysis of Rf2 instead of Nb4?? |
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Jun-12-09
 | | Sneaky: I think there are a thousand winning variations to today's puzzle, but they all start with 24...Be1. Good move! |
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| Jun-12-09 | | akapovsky: An even more beautiful line is 1.Be1 Rxe1 2.Rf2 Kh3
3.R7f3+ Nxf3
4.Rxf3+ Kg2 Qg3# |
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| Jun-12-09 | | johnlspouge: < <JG27Pyth> wrote: [snip] 25. e4 is a more interesting try IMO. > Hi, <JG27Pyth>. I am not sure. Toga gave two improvements to my Variations: (1) 28.Kh4 [or Kg2] Qg3#
(but mate is mate!)
(3) 25.e4 dxe4 wins quickly for Black. |
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| Jun-12-09 | | WhiteRook48: missed it!! |
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| Jun-13-09 | | TheaN: Friday 13 June
<24....?>
Target: 6:00;000
Taken: >5:00;000
Par
Material: = ds♗ / ls♗
Candidates: <[Be1]>
-ML-
Immediately. For some reason. Don't know why.
<24....Be1> completely immune, both the Bishop and the Rook. /A\
<25.Rxf6 Qg3‡ 0-1>
/B\
<25.Rxe1> this initiates a pretty nice combo. <25....Rf2† 27.Kh3 (Kg1 Qg3† 28.Ng2 Qxg2‡ 0-1) R8f3†! 28.Nxf3 Rxf3† 29.Kg2/h4 Qg3‡ 0-1> /C\
<25.e4> a defense I am stuck on a bit. Much else would allow Rf2† with clear advantage/mate for Black. <25....Bxh4!> as simple as it is. On 26.Rxh4 Rxf1  , but: <26.Rxf6 Bxf6 27.e5 Bxe5 > and Black will win two pawns, a center and more active pieces. Time to check. |
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| Jun-13-09 | | TheaN: 4,5/5
Sort of, not completely convinced. I FORGOT to add the Rxf6, but I had: /C\
<25.Rxf6 Qg3† 26.Kf1 Rxf6† 27.Ke2 Rf2†!?> with the intention of 28.Kd1 Rd2† , but I missed 28.Kxe1 Rh2†! 29.Kd1 Rxh1† 30.Kc2 Qxh4 , partly. Half point, at least. |
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