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Jun-01-15
 | | HeMateMe: If I had been there, I could have defeated a GM! |
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Jun-01-15
 | | agb2002: White has a bishop and a knight for the bishop pair. Black threatens 39... Qxe5 40.Qxe5 Bxe5.
The knight can deliver a fork on f5. Hence, 39.Qxg7+ Kxg7 40.Nf5+ and 41.Nxd4 + - [N]. |
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Jun-01-15
 | | al wazir: The game line is obvious. Less obvious is this one (my second choice): 39. Nf5 Qxe5 (the only way to stop mate) 40. Ne7+ Kh8 41. Qxe5 Bxe5 42. Nxd5, and white is again a piece up. |
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| Jun-01-15 | | stacase:
I followed the Monday rule, "Look at a Queen sacrifice first." So it fell apart after a few seconds. Unfortunately this is the sort of thing I miss over the board. |
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Jun-01-15
 | | sjunto: I chose 39. Nf5; Stockfish rates that 4.12 versus 5.05 for 39. Qxg7. You don't really always have to sac your queen on Monday, do you? |
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Jun-01-15
 | | Check It Out: <al wazir> Except then 42…Bd4 snags the exchange and a tough endgame ensues. |
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Jun-01-15
| | Morten: Al Wazir,
Working without a board here. But in you alternative line: 39. Nf5 Qxe5 40. Ne7+ Kh8 41. Qxe5 Bxe5 42. Nxd5, does Black not continue with 42-, Bd4 pinning the rook? |
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Jun-01-15
 | | Once: It's a take the money or open the box sort of position. We could nab a free bishop with the simple 29.Qxg7+ Kxg7 30. Nf5+. But then we get tempted by 29. Nf5 threatening mate on g7. That might give checkmate or it might win the black queen. And we would feel like prize eejits if we only took the bishop in line 1 when we could have had a bigger prize with line 2. And here the doubts and temptations creep in. Line 1 is simple and it wins a piece. Line 2 is more complicated. More risky. Take the money or risk it all to double your winnings? Fritzie says that 39. Nf5 also wins, but we need to spot a clever little trick. 39. Nf5 Qxe5 (forced) gets us to here: 
click for larger viewNow 40. Ne7+ is tempting but it doesn't lead to a clean kill. <Morten> is absolutely right to point out 40. Ne7+ Kh8 41. Qxe5 Bxe5 42. Nxd5 Bd4. 
click for larger viewFritzie calls this as a white advantage of +0.5. Half a prawn doesn't seem like much of a meal. Rewind. We can make 39. Nf5 work, but it needs a little finesse. After 39. Nf5 Qxe5 we have to flick in 40. Re2! 
click for larger viewThis takes the rook off the dark squared diagonal where it can be pinned against the White king. Now Black has to retreat his queen somewhere along the diagonal leading to g7. Then (and only then) White gets to play his Ne7+ trick. So 39. Nf5 works but it is quite a bit more complicated than the game line. And all it does is win the same material advantage. I'd stick with the game line.
If I might be allowed an aside, I'm having a (non-chess) book giveaway later this week. Details to follow on my page (just click on the blue). |
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| Jun-01-15 | | David2009: Three more Monday puzzles for you in the same game: B Khotenashvili vs A Goryachkina, 2014 (kibitz #1) Enjoy! |
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| Jun-01-15 | | fenno: I found 39. Qxg7+ easily, but I do not get Phony Benoni's comment <Grab, fork, and take it on the Lammi.> Is it Phony English or what? |
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Jun-01-15
 | | Bubo bubo: No mate today, but White wins a piece with the standard fork trick 39.Qxg7+ Kxg7 40.Nf5+ K~ 41.Nxd4. |
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| Jun-01-15 | | CHESSTTCAMPS: What - no queen sac for a mate? Nonetheless, white can do just as well with 39.Qxg7+ Kxg7 40.Nf5+ K any 41.Nxd4 and black should resign now if the earlier moves didn't do it. |
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| Jun-01-15 | | zb2cr: Simplest is 39. Qxg7+, Kxg7; 40. Nf5+ leaving White up by a full piece. |
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| Jun-01-15 | | morfishine: <39.Qxg7+> |
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Jun-01-15
 | | Penguincw: Damn, what is wrong with me? I haven't gotten a puzzle in about 2 weeks (which I believe was a Tuesday puzzle), and here I <continue> that. I did get 39.Qxg7+ Kxg7 though. I'm guessing the problem is that I was looking for mate, but there was none. However, OTB, I would probably find this fork. |
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Jun-01-15
 | | Phony Benoni: <fenno> Old slang expression describing a crook fleeing the police: <Take it on the Lamm>. You have to remember that I data back to the Truman Administration. |
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| Jun-01-15 | | gars: <Penguincw>: never mind! Go easy, enjoy your puzzles and things will be good again quickly. <Phony Benony>: I too date from the Truman Administration! That's hard! |
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| Jun-01-15 | | fenno: Thanks Phony Benoni.
Indeed, it is Lammi who we can blame about being the first who intended to steal black's Bishop here. |
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| Jun-01-15 | | patzer2: Black decisive error in this game comes after 21. e5 (diagram below),
click for larger viewwith 21...Bf8?? allowing 22. Qd4!  .
Instead (diagram above), Black should play 21...Rac8! when White has nothing better than 22. Qxa7! (Not 22. Qd4? Bf5!  ) 22... Qxa7 23. Bxa7 Rxe5 = with a dead level position. Another mistake comes after 37. Bf1 (diagram below)
click for larger viewwith <37...g5?>. Though not a decisive error, <37...g5?> allowing <38. Qxg5! >makes the win much too easy for White. Instead (diagram above) Black should play 37...Qxa4 with two pawns for the piece. After 37...Qxa4 the computer says White is winning after 38.Rd2 Qb4 39.Qf4 Be6 40.Rb2 Qa4 41.Rf2 Rd8 42.Rd2 Qb4 43.Ne4 Rxd4 44.Nf6+ Bxf6 (+1.96 @ 22 depth, Deep Fritz 14). However against a human player 37...Qxa4 offers practical drawing chances, as the win is difficult and there's lots of room for White to go wrong. <39. Qxg7+!> This solves our Monday puzzle with a winning Knight Fork combination set up by a sham Queen sacrifice. Though not quite as strong as the simple <39. Qxg7+!>, White can also win with the slightly more difficult 39. Nf5! Qxe5 (diagram below):
click for larger viewHere (diagram above) the strong in-between (a.k.a. intermezzo or zwischenzug) move 40. Re2! (not 40. Ne7+? Kh8 41. Qxe5 Bxe5 42. Nxd5 Bd4! =) wins after 40... Qf6 41. Ne7+ Kh8 42. Qxd5 . |
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Jun-01-15
 | | paulalbert: Tried to find something more than just winning a B with Qxg7ch but correctly decided that was all there was and certainly good enough for the win. |
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| Jun-01-15 | | Chess Dad: I got this one today fairly quickly, but spent some time looking for "something better."
Then I noticed that not only was I gaining a piece, but with my king and rook both on dark sqaures, and the rook currently pinned, having the DSB being the piece I gained would make the remainder of the game that much easier. |
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| Jun-01-15 | | thegoodanarchist: Hardest Monday ever, but I still got it. It just took longer than every other Monday before. Probably because Monday puzzles usually conclude with a mate or winning of a queen. Here White is "only" up a knight after the combination. |
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| Jun-01-15 | | Longview: I followed <Once> down the path of 39. Nf5 Qxe5 but I thought that 40. Nh6+ avoided his complications until I saw that the BSB was now unpinned and could recapture after 41.Qxe5 Bxe5 and I am down a pawn for nothing. I did not see the rook move. |
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| Jun-01-15 | | BOSTER: < fenno: who intended to steal black's Bishop > . If you knew the story of this game, you'd never use the word <steal> here.
Only half move before white Bishop d4 was offered for sale, and now black returned his Bishop g7.
It was a real bargain. |
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| Jun-02-15 | | kevin86: White sacs the queen and regains it with a fork and gains a piece. |
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sac: 39.Qxg7+