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German Samuilovich Fridstein vs Lev Aronin
URS-ch sf (1949), Moscow URS, rd 5, Jun-??
King's Indian Defense: Orthodox Variation. Positional Defense (E94)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-28-06  AbhinavAsthana: ♙I got it.!!!!♙
Dec-28-06  dzechiel: Found the first couple of moves right away, but not the entire combination. A very pretty dance between the rook and bishop.
Dec-28-06  ForeverYoung: I didn't see 38 Bg6+, but had 38 Bd2 for a response to Kh7.
Dec-28-06  Silverstrike: I got 37.Bh5+ Kh7 38.Bg6+, and didn't bother to look furthur, assumning that white would have an easy mate with furthur discoveries and moves like Bd4 etc. I don't know if that counts?
Dec-28-06  PawnOfTheDead: What happens after 38... Kh8? I can't see a quick mate or even a massive material gain.
Dec-28-06  kbaumen: Yay, it's the first time I solve a Thursday.
Dec-28-06  malthrope: <PawnOfTheDead: What happens after 38... Kh8? I can't see a quick mate or even a massive material gain.>

Probably just 39. Bd4 is good enough here! :-) For if 39... Bg7 then 40. Bf7 and the massive threats continue (the main threat now being 41. Bxf6 Bxf6 42. Rh5#). Now if 40... Qh4 then 41. Bxf6 > Rh5+ wins, or 40... Ne8 or 40... Nh5 then 41. Rh5# and Rxh5# respectively, etc. :-)

Dec-28-06  aldehyde: Kooool friday puzzle. i got into it to a good extend. then i stopped since i was sure that m going in right direction. and indeed i was going in a right direction.
Dec-28-06
Premium Chessgames Member
  alexmagnus: Got it!!
Dec-28-06  MaxxLange: I have to say I missed it....I saw the nice mate if 37...Kxf5?? but I thought that 37...Kh7 38. Rxf6? was good enough to win, and my softwares say that that's a draw at best after 38...Qxe3

Chess class is hard!

Dec-28-06  dfelix: Does 38. Bd4 work? An amusing continuation would be 38...Nxh5 40. Rxh5 and Black can't stop 41. Rg7+ Kh8 42. Rxh6# without dropping his queen.
Dec-28-06  Red Eyed Knight: aldehyde, Umm, it's Thursday, dude.

Chess is an amazing game. You dont even have to know how to tell the day of the week to be good at it.

Dec-28-06  TrueBlue: guys, if you haven't figure it out by now, it's Christmas week. That's why all puzles this week are easy!!!!!
Dec-28-06  Tacticstudent: Very very easy. no trouble on the resolution, since black's king has traveled along all kingside and his protectors are blocked by themselves and are of no use against the White rooks.
Dec-28-06  YouRang: Nice puzzle. I found the first moves pretty easily. Steps: (1) I saw the discovered check (if Bg4 moves), then (2) I noticed that I "can't" move Bg4 because it's guarding against KxRf5. But then I noticed the key: (3) after 37. Bh5++ (double check - important point) Kxf5 38. Bg6# is mate.

The real trick to this puzzle (and the part I couldn't see all the way) is to notice that you had to play 39. Bg6+! (the hasty 39. Rxf6 gives black time to counter-attack, getting at least a perpetual). This forces 38...Kg8, setting up yet another discovered double check (if 38...Kh8, then 39. Bd4! saves the Be3 and pins & wins the knight with check, with mate to follow).

Of course, after 38. Kg8 Rxf6, the poorly protected black king will be mated anyway by the swarming rooks and bishops.

Dec-28-06
Premium Chessgames Member
  kevin86: This was a neat version of the windmill theme-more like a zig zag theme. The white domination of the white colored squares is total,complete,and final!
Dec-28-06  Chris1Clark: I quite liked 39. Bd4, it hangs on to the bish and we then get the black knight in a dopey position trying to hang on to it like 39...Nd7 then 40. Be8+ and I reckon that's a resign with 40...Kh7 41. Rf7# to follow.
Dec-28-06  emonys: You can always tell who the novice players are. They are the ones who always say I GOT THE PUZZLE IN LESS THAN 5 SECONDS
Dec-28-06  Kruglov: <dfelix: Does 38. Bd4 work?> Phew! I think it works, but is definitely harder. I hope my analysis is quite complete. Feel free to comment if I overlooked something.

38.Bd4 Nxh5 39.Rxh5, then Rg7+ and Rxh6# forced.

38.Bd4 Bg7 39.Bxf6 Bxf6 40.Rxf6 and and mating combination of 41.Rf5... 42.Bf7... 43.Rh5 can be prevented only by dropping black queen.

38.Bd4 Qh4 39.Bg6+ Kg8 (39...Kg7 or Kh8 40.Bxf6+ wins) 40.Bf2 Bxf4+ 41.Kg2

a) 41...Qxh3 42.Rxf4 (threat of Bf5+ winning black queen) Qc3 (42...Qh8 43.Bd4) 43.Bh4

a1) 43...Qe3+ 44.Rff2 Nh7 45.Bf7+ Kf8(h8) 46.Rg8#

a2) 43...Qe3+ 44.Rff2 Nd7 45.Be8+ ... and 46.Bxd7

a3) 43...Qc1+ 44.Rf1 Qe3+ 45.Rff2 same as above.

a4) 43...Qe3+ 44.Rff2 Qe1+ 45.Kh2 N__ 46.Rf8+ winning queen; 45...[any other move] 46.Bxf6

a5) 43...Qe3+ 44.Rff2 Qh6 45.Kh3 Qe3+ 46.Rg3 Qxf2 47.Bf5+ Kf8(h8) 48.Rg8+ Kxg8 49.Bxf2 seems best for Black, but still losing

b) 41...Qh6 42.Rxf6 (threat of Bf5+ winning black queen) Kg7(h8) 43.Rf7(+) Kg8 44.Rh7 and black queen is lost, if 44...Qf8 45.Bf5+

c) 41...Be3 42.Bxe3 Qe1+ 43.Kh2

c1) 43...Qxe3 44.Rxf6 and same mating combination of Rf5..., Be8+..., and Rh5.

c2) 43...Qc3(a1) 44.Bg5 Nh7(d7) (44...Kg7 45.Bxf6+ wins) 45.Be7... 46.Bf7+... 47.Rh5#. And if 44...[any other move], then black knight is lost, white king is well protected and white two rooks and two bishops force a checkmate in several moves.

Dec-28-06  Happypuppet: I spent awhile looking at defenses for 37... Nxh5 before banging my head against the table. At least I got the puzzle.
Dec-28-06  aazqua: Easy puzzle, and what the heck was blakc thinking here? After the q trade balck did everything possible to shift the imbalance against himself. Way to open files for the rooks and energize white's bishops! Nice Job!
Dec-28-06  Knight13: Got this one is 7.99999999998 seconds. Too easy for Thursday.
Dec-28-06  malthrope: <Knight13: Got this one is 7.99999999998 seconds.> Are you *positively* sure about that last digit the '8?' ;-)
Dec-29-06
Premium Chessgames Member
  kevin86: I solved the puzzle very quickly also,but since the time segment involved is a transcendental number-I cannot write it here,it also means I don't know what the last digit is-as it has NO last digit-lol
Jan-05-07  Happypuppet: <kevin86> When you get right down to it, the probability is almost one that the time was a transcendental number. There are countable algebraic numbers (the complement of transcendentals on the reals) but uncountable transcendental numbers. Good truthful statement! (unlike some others are used to making around here) :)
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