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| Aug-20-16 | | drollere: material is about equal, although black's linked c/d pawns are dangerous. black threatens Nxe8 or Qxb3. the first two moves in the combination were obvious; the rest was harder. 28. Rxf8+ Kxf8
29. Bxd6+ Kg8
30. Bxc5 Ra8
31. Qe5 Ne6
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| Aug-20-16 | | patzer2: For this Sunday puzzle I found 28. Rxf8 Kxf8 29. Bxd6+ Kg8 for the initial moves in this King hunt, but instead of 30. Ng5 I went for 30. Bxc7 Qxc7 31. Qe8+ Kg7 32. Rd8  .The computer prefers my continuation giving White a clear win after 28. Rxf8+ Kxf8 29. Bxd6+ Kg8 30. Bxc7 Qxc7 31. Qe8+ Kg7 32. Rd8 Qe7 (32... Kf6 33. Rd7 Qc6 34. Qe5#) 33. Qg8+ Kh6 34. Re8 Qf6 35. Ne5 Qd6 36. Ng4+ Kg5 37. Qg7 Re7 38. Rxe7 Qxe7 39. Ne3 Ra7 40. h4+ Kf4 41. Nd5+ (+10.99 @ 20 depth, Deep Fritz 15). |
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| Aug-20-16 | | YouRang: Saturday 28.?
click for larger view
I thought this was pretty easy for a Saturday. My Re8 is attacked by the N, and I have no good place to move it. I suppose 28.Rd3 retracts it to safety (and guards the attacked Pb3), but that's unlikely to be the puzzle solution. The only interesting try is <28.Rxf8+! Kxf8>, which allows <29.Bxd6+>
click for larger view
Black's options:
- Move out of check: 29...Kg8 30.Bxc7 (removes defender of e8) Qxc7 31.Qe8+ Rd8! and it's smells like mate. - I think 29...Kg7 is similar (30.Qe5+ Kg8 31.Qe8+ ...) - Take the bishop: 29...Rxd6 30.Rxd6, and I'm up a pawn with good threats (e.g. Rd8+, Qe5, Ng5). I think black's in trouble. I didn't calculate it all out, but it's pretty clear that black's in trouble after 28.Rxf8+ springs a strong attack from white. |
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| Aug-20-16 | | YouRang: <al wazir><What was wrong with 40. Rxd5 ?> Nothing. No idea why black played 39...Nd5. Maybe so he could pretend that he wasn't losing until he "blundered" on move 39? |
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| Aug-20-16 | | diagonalley: well... in principle i would go with the exchange sacrifice to achieve two connected passed pawns - though admittedly it could still be a long slog to convert to a win |
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| Aug-20-16 | | lost in space: deleted my previous post. It was more or less identical to the one of <YouRang> |
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| Aug-20-16 | | AlicesKnight: Saw the first three moves but not the consequences of the game; not clear how a decisive line was forced (my wife says I'm not a morning person....) |
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| Aug-20-16 | | Mendrys: Like <al wazir> above I saw the game moves and figured that 29...Rxd6 30. Rxd6 was best but wasn't sure of a clear win here:
click for larger viewthe engines certainly like this position with Stockfish giving it a +2.7 evaluation but really the forced win is above my pay grade. Not that I couldn't win it or feel that I was better it's just that I'm sure black could find plenty of counter play against me in the resulting endgame. |
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| Aug-20-16 | | morfishine: Pin Pinski |
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| Aug-20-16 | | patzer2: <YouRang> Oops! It is Saturday. Just got back from a long vacation visting the children and grandchildren, and lost track of the day of the week. Looks like we thought along the same lines on this Saturday problem with the follow-up <29...Kg8 30.Bxc7 (removes defender of e8) Qxc7 31.Qe8+ Rd8! and it smells like mate.> P.S.: My 7-year-old Grandson is starting to make some noise in central Texas Chess. He recently held his own with one win and two draws (one draw was against the second place finisher) in a five-round blitz tournament against strong adults and very strong juniors. One of his blitz games (five minutes, no delay) he was up a whole Queen with a won game (against the third place finisher) but lost on time. His other loss was to a USCF top-100 10-year-old. His blitz rating probably puts him in the USCF top 100 for 7-year-olds, but he needs to play a few more rated tournaments to get his regular rating up to his actual playing strength. Didn't realize just how strong and competitive Texas scholastic chess had become until I read about the 15-year-old junior sensation Jeffery Xiong who lives near the Dallas area and is currently leading the World Junior Championship (2016) with super GM play such as in J Xiong vs C Aravindh, 2016. |
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| Aug-20-16 | | Patriot: 30.Ng5! is the move I missed, which prevents the defense, 30...Ne6. I went with 30.Bxc7 Qxc7 31.Qe8+ Kg7 32.Rd8. It wasn't totally clear but it seemed like an interesting hunt. Of course, 28.Rxf8+ Kxf8 29.Bxd6+ Rxd6 30.Rxd6 and white wins a pawn. |
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| Aug-20-16 | | YouRang: <patzer2> You may have two Sundays this week (I had two Fridays myself just last week). In reading my line in your post, I see that I was a bit too terse with <31.Qe8+ Rd8!>, as if white gets two moves in a row. Rather <31.Qe8+> with Rd8! to follow. Good luck to your grandson, but I agree that he should move on from blitz (which IMO isn't even real chess). Has he beaten you yet? It's always a great thrill for a kid to beat an adult. I still remember the first time I beat my Dad. :-) |
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| Aug-20-16 | | YouRang: <Patriot: 30.Ng5! is the move I missed, which prevents the defense, 30...Ne6. I went with 30.Bxc7 Qxc7 31.Qe8+ Kg7 32.Rd8. It wasn't totally clear but it seemed like an interesting hunt.> I don't think you missed anything. As <patzer2> pointed out earlier, 30.Bxc7 is actually the engine preference because the king hunt succeeds. |
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| Aug-20-16 | | patzer2: <YouRang> My 7-year-old grandson has beaten me many times, especially in blitz. He prefers gambits and wild tactics, while I take a slightly more positional approach. In one recent game while I was trying to gain space on the
Queen-side, he sacrificed two pieces to mate me on the king-side. He recently finished going through Pandolfini's endgame book, which is helping him when he gets into even endgames against other young scholastic players. The book he is currently going through (Chess Tactics for Juniors) emphasizes basic middle game tactics. I put the positions in fen notation on a word document for him and his brothers so they can copy and paste them to Fritz and have the computer help them analyze endgame and middle game positions. |
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| Aug-20-16 | | morfishine: <patzer2> Where in Central Texas? I'm from Abilene and lived in Fort Worth |
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| Aug-20-16 | | patzer2: <morfishine> My grandson lives in Waco. |
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| Aug-20-16 | | agb2002: The material is identical.
Black threatens Nxe8 and Qxb3.
The first idea that comes to mind is 28.Rxf8+ Kxf8 29.Bxd6+: A) 29... Kg8 30.Bxc5
A.1) 30... Ra8 31.Qe7
A.1.a) 31... Re6 32.Rd8+ Rxd8 (32... Kg7 33.Bd4+ wins -33... Kh6 34.Qh4#-) 33.Qxd8+ A.1.a.i) 33... Kg7 34.Bf8+ Kg8 35.Be7+ and mate in two. A.1.a.ii) 33... Re8 34.Qd7 with a bishop and two pawns for the exchange and ideas like b4 (34... Qxb3 35.Qxc7), Bd6, Ne5, etc. A.1.a.iii) 33... Ne8 34.b4 again with two pawns for the exchange and the simple plan of pushing the a- and b-pawns. A.1.b) 31... Re8 32.Rd8
A.1.b.i) 32... Re6 33.Rxe8+ wins (33... Nxe8 34.Qxb7). A.1.b.ii) 32... Qc6 33.Rxe8+ Qxe8 (33... Nxe8 34.Qf8#) 34.Qxc7 + - [B+N+2P vs R]. A.1.c) 31... Qxb3 32.Qxc7 wins decisive material.
A.2) 30... Re6 31.Rd8+ Kg7 (31... Ne8 32.Rxe8+ wins decisive material) 32.Bf8+ Kf6 (else 33.Bh6+ and mate in two) 33.Qc3+ Kf5 34.Qc5+ wins (34... Kf6 35.Qg5#; 34... Ke4 35.Rd4#; 34... Kf4 35.Qg5+ Ke4 36.Rd4# or 36.Nd2#). A.3) 30... Qxb3 31.Rd8+ Kg7 32.Bf8+ Kf6 33.Qe5#.
B) 29... Kg7 30.Qe5+
B.1) 30... Kh6 31.Bf8#.
B.2) 30... Kg8 31.Bxc5 Ra8 32.Rd7 Rc6 33.Qe7 wins (33... Qxb3 34.Rd8+ Rxd8 35.Qxd8+ and mate in three). B.3) 30... f6 31.Qe7+ Kh6 (else 32.Qf8#) 32.Qf8+ Kh5 33.g4#. C) 29... Rxd6 30.Rxd6
C.1) 30... Qxb3 31.Rd8+ Kg7 32.Qe5+
C.1.a) 32... f6 33.Rd7+ Kg8 (33... Kh6 34.Qf4+ and mate in two) 34. C.1.b) 32... Kh6 33.Qf4+ Kg7 (else 33.Qg5#) 34.Qd4+ and 35.Qxa7 wins. C.2) 30... Ne6 31.Qc3 and White is a pawn ahead with the better position. |
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| Aug-20-16 | | WorstPlayerEver: Pinski in da binski. |
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| Aug-20-16 | | Patriot: <YouRang> <I don't think you missed anything. As <patzer2> pointed out earlier, 30.Bxc7 is actually the engine preference because the king hunt succeeds.> Thanks. I wasn't sure how the hunt would win but thought it might. The main threat after 28.Rxf8+ Kxf8 29.Bxd6+ Kg8 30.Bxc7 Qxc7 31.Qe8+ Kg7 32.Rd8 seems to be 33.Qh8+ Kh6 34.Qf8+ Kh5 35.g4#, which is why the computer's choice in <patzer2>'s line is 32...Qe7 (stopping 34.Qf8+). You're right that 29...Kg7 can transpose via 30.Qe5+ Kg8. Also possible are 30...f6 and 30...Kh6 which are losing. |
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| Aug-20-16 | | thegoodanarchist: I got the first two moves and then the thread of the game went where I least expected |
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| Aug-20-16 | | morfishine: <patzer2> Waco is a great city! Congratulations on your grandson! He seems very skilled at chess for his age, almost gifted |
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| Aug-20-16 | | Cheapo by the Dozen: I guess we're supposed to think that we solved the puzzle if and only if we saw ahead to 32 Nxf7? Most of us would have sacked the exchange and then captured on d6 even if we didn't see that far ahead, so it's not a great puzzle. |
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| Aug-20-16 | | MaczynskiPratten: I suspect 39... Nd5 was a blunder in time trouble just before a time control at move 40. At least it saves Black time compared to being gradually ground down in a grim ending 3 pawns down. |
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| Aug-21-16 | | patzer2: <morfishine> Thanks! I suppose most Grandparents believe their Grandchildren are exceptional and gifted, and I'm certainly no exception. I'm proud of all five of my grand children, and am thankful they share some of my interests including chess. |
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| Aug-21-16 | | morfishine: <patzer2> Feel free to drop my forum. Mostly the discussion lately is on analysis, thought processes, candidates, etc., with my good friend <Patriot> For the past year, I've been exploring Chess960, which has been quite an adventure; Its been very refreshing, discarding the staleness from the same old openings from standard chess Happy Chess!
best, morf
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Kibitzing
sac: 28.Rxf8+
