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Edgar Thomas McCormick vs Heinrich Rolletschek
88th US Open (1987), Portland, OR USA, rd 7, Aug-09
Bishop's Opening: Vienna Hybrid (C28)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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Sep-26-17  gofer: A nice simple Tuesday...

<46 ... Rg7>
<47 Rd2 Rh1+>
<48 Rh2 Qe5>


click for larger view

49 Rxh1/a4/b3/b4/c5 Qg3#
49 Kxh4 or any queen move Rxh2#

Sep-26-17  saturn2: After 47 Kh2 47..QxRd7 is also playable instead of the mentioned 47..Qe5+
Sep-26-17
Premium Chessgames Member
  offramp: McCormick was on the wrong end of a humdinger.

Hence the phrase Humdinger, Humdinger, Humdinger, Humdinger and McCormick.

Sep-26-17
Premium Chessgames Member
  Once: Fritzie confirms that there are two solutions today. Black wins with either 46...Rg7 or 43...Qxd7 44. Qxd7+ Rg7

Incidentally, after 46...Rg7 ...


click for larger view

... white can prolong matters with 47. Qxc7 or 47...e5 but then black simply captures the white Rd7 to go two rooks up. Mate will come very soon.

Sep-26-17  AlicesKnight: There's no way out of the pin, so take with 46...Qxd7; 47Qxd7+ Rg7 and now White must either give up the Q by capturing (leaving Black a R up), or try to block the h1 mate with Qd2, again leaving Black a R up. Let's see - Oh! - how silly, of course - the right notes, not necessarily in the right order....
Sep-26-17  jffun1958: 46. ... Rg7 47. Rd2 Qe5 and Black will mate on h1 with the rook or g3 with the queen.
Sep-26-17  Walter Glattke: 46.-Qxe7 47.Qxe7+ Rg7 48.Qd2 Rh1+ also wins.
Sep-26-17  Walter Glattke: c:46.-Qxd7+ 47.Qxd7+ Rg7 also wins.
Sep-26-17  stacase: 46...g7 threatens mate and attacks White's Rook. White can defend against the mate 47.e5 but then Black wins the Rook and ultimately the game with two instead of just one Rook up.
Sep-26-17
Premium Chessgames Member
  WorstPlayerEver: 46... Rg7 47. Rxe7 Rh1#

-47. e5 Qd7 48. Qf3 Qd3 49. Kh4 Qe4 50. ef6 Rh1#

-47. Qc7 Qd7 48. Qh2 Qd3 49. Kh4 Qe4 50. Qf4 Rh1#

-47. Rd1 Rd1 48. e5 Qe5 49. Qg2 Rg2 50. b3 Qg3#

Sep-26-17  mel gibson: The position was caused by a blunder
on move 43 by white.

This was the proper move:
43 Rd2

(43. Rd2
{(Rd1-d2 h4-h3 Rg2-g6 Rg7xg6+ f5xg6+ Rg8xg6+ Kg1-h1 Qe7-e5 Qc6-d7+ Rg6-g7 Qd7-f5+ Qe5xf5 e4xf5 h6-h5 a3-a4 Kh7-h6 b2-b4 Kh6-g5 Kh1-h2 c7-c5 Kh2xh3 Rg7-a7 Rd2-a2 c5xb4 c3xb4) -0.66/18

Score for black -0.66 depth 18.

But instead white lost his Rook with
43 Kh1

43. Kh1 43. .. Rxg2 (43. .. Rxg2 (♖g7xg2
♕c6-d7 ♕e7xd7 ♖d1xd7+ ♖g8-g7 ♖d7-d1 ♖g2xb2 ♖d1-d3 ♖b2-e2 ♖d3-d4) +9.27/17 53)

score for black +9.27 depth 17.

Sep-26-17  SpamIAm: Edgar McCormick (1914-1991) was a New Jersey gentleman of master strength who played in virtually every U.S. Open chess tournament from the late 1930's through the 1980's. I saw him at the 1986 U.S. Open in Hollywood, Florida as well as several New York Opens and World Opens in the mid 1980's. Here he makes several late mistakes but I don't attribute them to his advanced age but more likely time pressure- the U.S. Open featured a somewhat unusual 50 moves in 150 minutes (2&1/2 hours) time control and many games started to "go critical" in between moves 40 and 50.
Sep-26-17
Premium Chessgames Member
  patzer2: For today's Tuesday puzzle solution, count me among those who picked the alternative solution 46...Qxd7 47. Qxd7 Rg7 -+ (mate-in-41, Stockfish 8 @ 38 depth.)

Leading to mate quickest is the game move 46...Rg7! -+ (mate-in-five, Stockfish 8 @ 38 depth.) Stockfish gives the shortest mating line as 46...Rg7 47.e5 Qxd7 48.Qf3 Qd3 49.Kxh4 Qxf3 50.exf6 Rh1#.

P.S.: White's decisive error was 43. Kh1? allowing 43...Rxg2 -+ (-124.27 @ 34 depth, Stockfish 8.) Instead, 43. Rd2! h3 44. Rg6 ⩱ (-0.48 @ 31 depth, Stockfish 8) would have kept White in the fight for a draw.

Earlier, instead of 40. Qd5+ Kh7 ⩲ to = (+0.30 @ 32 depth, Stockfish 8,) White missed a win with 40. hxg5! +- (+3.50 @ 33 depth, Stockfish 8) when play might continue 40...Rxg5 41.Qd8+ Qf8 42. Qxc7 Rxg2+ 43. Kxg2 Rh7 44. Qxb6 Rg7+ 45. Kf3 +- (+4.04 @ 33 depth, Stockfish 8.)

Sep-26-17
Premium Chessgames Member
  malt: I'm going to go for 46...Rg7
Sep-26-17
Premium Chessgames Member
  whiteshark: <46...Rg7>, and that's it.

An epiphanic realization on <46...Qxd7 47. Qxd7 Rg7>. TY

Sep-26-17  Pasker: That's a rare trick. Pretty cool
Sep-26-17
Premium Chessgames Member
  kevin86: The key move breaks the pin on the queen and threatens mate. White cannot stop it.
Sep-26-17  leRevenant: Roll out the check.
Sep-26-17
Premium Chessgames Member
  Richard Taylor: I saw this one but I only looked a few counter moves. Rg7! looked the ticket.
Sep-26-17
Premium Chessgames Member
  Richard Taylor: Rg7!! would be an evil move to face over the board!
Sep-26-17
Premium Chessgames Member
  Bubo bubo: Black saves his pinned queen with 46...Rg7, thanks to the threat of Rh1#. White is down a rook and will soon be checkmated.
Sep-26-17  Tiggler: Took me ages to spot the only move Rg7! Even the whit player could not believe it, and played another futile move.
Sep-27-17
Premium Chessgames Member
  Richard Taylor: <Tiggler> who is Chuan Zhu?
Sep-28-17  Tiggler: <Richard Taylor> Many alliteration versions. Try Zhuang Zhou: https://en.wikipedia.org/wiki/Zhuan...
Sep-30-17
Premium Chessgames Member
  Richard Taylor: <Tiggler> (I always think of "Tigger")...Fascinating on that link. We can only touch the immensity of human experience and knowledge. I have never really looked into the Chinese philosophers. Some of the poets....and some writings by Mao tse Tung. I did think of tackling 'The Dream of the Red Chamber' but time etc has meant it eludes me...

...perhaps some of the ideas of Zhuang Zhou should be fed to Big Pawn for his deep consideration...or DT Himself?

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