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Arthur Bisguier vs James T Sherwin
"A Sherwin for White" (game of the day Apr-07-2017)
USA-ch (1954), New York, NY USA, rd 12, Jun-12
Queen Pawn Game: Veresov Atack. Richter Variation (D01)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Mar-03-09  WhiteRook48: a Sherwin for white
Apr-07-17
Premium Chessgames Member
  offramp: A very exciting game. 32.Na3 is the crucial move.

A tribute to the the winner, who died recently.

Apr-07-17
Premium Chessgames Member
  al wazir: 40...b2. Now what?

If 41. Rg1, then 41...Qc1+ 42. Qxc1 bxc1=Q+ 42. Rxc1 43. Bxc1 Kxc1 44. d4. The white ♔ is tied to defense; black's ♔ gobbles up white's ♙s one by one and wins.

If 41. Rg8+, then 41...Kxg8 42. Qg4+ Kf8 43. Qg7+ Ke8 44. Qg8+ Bf8! 43. Qg1 e2.

If 41. Rc2, then 41...Qxf6, and I think there's still a lot of play left.

Apr-07-17
Premium Chessgames Member
  eykca: Jezus.... If I'm going to give grief if a GotD isn't a <fire-cracker> then I need to doff my cap when we get one like this... wow... was a pleasure to play through. Gutsy play by white.
Apr-07-17
Premium Chessgames Member
  offramp:


click for larger view

33...Rxc1+ would have won for Black.
34. Rxc1 bxa3 Δ35...axb2+ 36. Kxb2 Qa2#.

Apr-07-17
Premium Chessgames Member
  gofer: <<al wazir: 40...b2. Now what?> <If 41. Rc2, then 41...Qxf6, and I think there's still a lot of play left.>>

Yes there is! For White!

42 Qg4 ...


click for larger view

Now it is black that must find a defence and it is very difficult for black to avoid

43 Qc8+ Kg7
44 Rg2+ Kh6
45 Qg4 ...

So I think defence is actually quite tricky!

Apr-07-17
Premium Chessgames Member
  thegoodanarchist: < WhiteRook48: a Sherwin for white>

8 years between pun suggestion and pun usage. Surely that's the record.

Apr-07-17  Ironmanth: Agreed here; really daring play by White. RIP Arthur Bisguier.
Apr-07-17  cunctatorg: Exciting and lovely chess!!
Apr-07-17  Strelets: This is an outstanding demonstration of defense as being founded in tactics. Bisguier's successful defense of the position rests on his analysis of defects in Sherwin's attack; that is, the determination that his tactics were inaccurate.
Apr-07-17  catlover: <offramp> <33...Rxc1+ would have won for Black. >

Sure enough. Wow...one small misstep and Sherwin's counterattack falters, right at a point when he could have won. There is a saying that nicely sums this upósomething about horses and nails and battlesóbut anyway you get the idea.

Apr-07-17
Premium Chessgames Member
  offramp: Fred the Bear is the guy to answer these questions, not me.
Apr-07-17
Premium Chessgames Member
  AylerKupp: <al wazir>, <gofer> FWIW after 40...b2


click for larger view

Stockfish 8 at d=48 gives the following line after 41.Rc2 (anything else leads to either a winning position (41.Rg1) or a forced mate in 17 or less (41.Ka2) and evaluates it as winning for White, [+3.44]:

41...Qxf6 42.Qg4 Bd6 43.f5 Bc5 44.Rxb2 (if 44.Rxc5 then 44...Qa6 and apparently Black's best, per Stockfish is to give up the rook immediately by 45.Rc8+ Qxc8 46.Qb4+. 45.Kxb2 Qb6+ 46.Rb5 Qxb5+ gives up the rook under circumstances more favorable to Black (Stockfish evaluation [-6.33], d=33) and 45.Kc2 results in a similar line (and the same evaluation) after 45...b1Q+ 46.Kxb1 Qb6+ 47.Kc2 Qxb5+) 44...Bd6 45.Qg5 Be5 46.Rb8+ (46.Qxf6 Bxf6 leads to an equal game, to try for a win White must give up its rook for Black's Pb2 and his B, also leading to an even game) 46...Ke7 47.Rb7+ Kf8 48.Qxe3 Qxf5 49.Qc5+ Kg8 50.Qxd5 (the exchange and a passed pawn up should be a win for White, eventually, in the absence of Black threats unless Black can force a perpetual check)) 50...Qf4 51.Qg2+ Kf8 52.Qe4 Qh2 53.Qd5 Qf4 54.h5 Bd4 55.Kc2 Qf2+ 56.Kb3 Qb2+ 57.Ka4 Qc2+ 58.Rb3 (all of White's pieces are protected) 58...Bf6 59.h6 Kg8 60.Kb5 Qc8 61.Rb4 Qb8+ 62.Ka4 Qa7+ 63.Kb3 Qa1 64.Rb8+ Kh7 65.Rb7 Kxh6 66.Rxf7


click for larger view

And from this position after 66...Qb1+ White mates in 29 moves per the Lomonosov tablebases. Restarting the analysis from this position Stockfish evaluates it as a win for White at d=21 in all cases ([+128.35)] but was not able to find any forced mates by the time I got tired and gave up at d=41.

Apr-07-17
Premium Chessgames Member
  AylerKupp: <offramp> According to Stockfish 8 after 33...Rxc1+ White can prolong his agony (a good example of the original horizon effect) by 34.Rxc1 bxa3 35.Qxf7+ (the influence of the horizon effect begins, White sacrifices everything in order to delay mate as long as possible) 35.Kxf7 36.g6+ Kxg6 37.Rg1+ Kh5 38.Rg2 (38.Rg5+ would seem to be more in the spirit of the horizon effect and it leads to an equally shorter mate after 38...fxg5 39.f5 axb2+ 40.Kxb2 Qa2+ 41.Kc1 Qc2# but I guess that Stockfish selected its Principal Variation because it minimized White's material disadvantage at the end) 38...Qc6 39.Rg1 axb2+ 40.Kxb2 Qc2+ 41.Ka1 Qa2#
Apr-07-17
Premium Chessgames Member
  al wazir: <AylerKupp>: So after 40...b2 41.Rc2, white wins in 54 more moves?

That's consistent with what I said: a lot of play.

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