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Somacarana vs John Cochrane
Calcutta (1855)
Bishop's Opening: Berlin Defense (C24)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jan-04-11  Tequestar: Had Black played 19...g6; 20...Kg7 and 21...Rh8, he might survive in this position even if White kept pressing by doubling his Rooks on h-file and pushing the pawn wall. However, undermining with 19...f6 only increases the activity of enemy Bishop.

So here is the thing about one Bishop and what about the other one? It's peacefully sitting at e3, only staring at three ally pawns, pretending to be the fourth. But his hidden potential lies in indirect protection of g5 soldier, whom Black just tried to remove. This allows following shot:

20. Rxh7+

And in totally forced fashion, White mates by:

20...Kxh7 21. Rh1+ Kg6 22. f5#

Jan-04-11  Gersch: This was the same problem as yesterday :(
Jan-04-11  Cushion: The doesn't seem to any connected theme between these puzzles.
Jan-04-11  zb2cr: <Cushion>: The linkage was twofold. First, so-called "Rook reloader" on the h-file--that is, sacrifice one Rook to fully open the file, then deliver check with the other Rook. Second, in both puzzles, the potential flight square for the Black King g8 was covered by a White Bishop.
Jan-04-11
Premium Chessgames Member
  DarthStapler: Got it
Jan-04-11
Premium Chessgames Member
  gawain: In with the new puzzle, same as the old puzzle. Do I detect a theme? Three move mate starting with Rxh7+

A nice touch: the bishop on e3 protects the g5 pawn as the f-pawn (which had been covering the g-pawn) delivers the mate

Jan-04-11  1.e4effort: got this one in not time flat - pretty much the same as yesterday's theme. This one is from 1855, so i guess I WAS born 100 years too late!
Jan-04-11  JG27Pyth: Ok. What on earth excuses 19...f6?? I mean you're John Cochrane, you're supposedly a decent chess player, you play an 1855 appropriate rudimentary positional game -- in other words the chess you play is all about the combinations -- and you spend your time devising nasty ways to attack the king -- I had previously presumed this meant you devoted perhaps a jot of mind power to looking out for your opponent's nasty ways of attacking your king, since he's playing 1855 style chess too -- yet you play f6?? Ugh. I guess everyone blunders... but f6 is a remarkably clueless move.
Jan-04-11
Premium Chessgames Member
  gofer: 20 Rxh7+ Kxh7 21 Rh1+ Kg6 22 f5#
Jan-04-11  mastermind7994: Found it. I am 2/2 this week. Great.
Jan-04-11  jsheedy: Sure, 19...f6 opened the a2-f7 diagonal for White, but what was Black to do? White's immediate threat is 20. g6. If Black plays 19...d5, he loses a pawn and White's threat remains (e.g., 20. exd5, cxd5, 21. Bxd5). If Black tries 19...Nc7, to prepare ...d5, then simply 20. g6!, fxg6, 21. Rxh7+, Kxh7, 22. Rh1#.
Jan-04-11
Premium Chessgames Member
  kevin86: Easier than yesterday,the only challenge is that the pawn is able to mate as the bishop forbids any return.
Jan-04-11  M.Hassan: <jG27Pyth:What on earth excuses 19....f6??> Agreed!. Big mistake.Bad blunder. But, what would have been best Black's move on 19th? 19.....g6 may be?
Jan-04-11  WhiteRook48: I love this Tuesday puzzle
Jan-04-11
Premium Chessgames Member
  lost in space: Late, but hopefully not too late:

All moves forced. 20. Rxh7+ Kxg7 21. Rh1+ Kg6 22. f5#

Jan-04-11  MiCrooks: It does not appear that Cochrane was a particularly strong player (despite the reputation). He played many games and several matches against top competition but he tended to lose most of those. Here he walks into a forced mate with the howler f6???

The only person Somacarana played that is recorded is Cochrane and they played almost 200 games together. I doubt that if Cochrane had not run in the right circles so-to-speak AND habitually wrote down the moves to his games, that we would ever have heard of him.

Jan-04-11
Premium Chessgames Member
  moronovich: Tomorrows solution will be -Rxh2!
Jan-04-11  dufferps: I can't help wondering how it would have played out if John Cochrane had played 19. ... g6 instead of 19. ... f6

Did he overlook the bishop lurking at b3?

Jan-04-11  wals: Yes sirree, exactly as per the text moves. 20.g6 is a blunder, Black's 20...h6 puts a stop to that caper.

RYBKA 4 x 64

BLUNDERS

BLACK: depth : 20 : 8 min :
(+1.14):13...Qh4. Best, g6, 0.52.

1. (0.52): 13...g6 14.f5 Nd7 15.Be3 Kh8 16.a4 Ba5 17.Bh6 Ng7 18.fxg6 fxg6 19.Qd3 Qh4 20.Qe3 Rae8 21.Bg5

2. (0.79): 13...Nf6 14.e5 Ne8 15.Be3 Na6 16.Qg4 Kh8 17.Rfd1 f5 18.Qh5 d5 19.a3 Nac7 20.Bc2 g6 21.Qg5 Ne6 22.Qxd8 Rxd8

Inferior move, 17...Kh8, +1.72, (best,
Re8 or c5) helped to erode Black's
chances.

19...f6, +#3, was the ultimate error.

There were other choices for Black.

1. (2.39): 19...g6 20.Rh6 Kg7 21.Rah1 Rh8[] 22.f5 Rad8 23.fxg6 hxg6 24.Rxh8 Rxh8 25.Rxh8 Kxh8 26.Bxf7 Kg7 27.Be6 Nf8 28.Bc8 Nb4 29.Kg3 a5 30.Bxb7 Ne6 31.Bxc6 Nxc6 32.d5 Bxe3 33.fxe3 Ncd8 34.dxe6 Nxe6

2. (2.45): 19...h6 20.f5 Nc7 21.Kf3 c5 22.gxh6 g6 23.Na4 Kh7 24.Rad1 gxf5 25.exf5 Rad8 26.Nxb6 axb6 27.Rhg1 Ne8 28.a4 Rc8 29.Bd5 Rc7 30.Bf4 Ndf6 31.Bc4

3. (2.46): 19...Rac8 20.g6 h6 21.Bxf7 Nb4 22.e5 Nc2 23.Rad1 d5 24.Kf3 Rfd8 25.a3 Rc7 26.Kg4 Ba5 27.Bc1 b5 28.b4 Bb6 29.Ne2 a5

4. (2.55): 19...Nc7 20.g6 Nf6 21.Bxf7 h6 22.Kf3 Rfd8 23.e5 Nfd5 24.Nxd5 Nxd5 25.e6 Ne7 26.Rh5 d5 27.f5 Ng8 28.Rah1 Rf8 29.b3 Bc7 30.Bd2 Ne7 31.Kg4

5. (2.62): 19...Kg8 20.f5 d5 21.Rh3 Rfd8 22.Rah1 Nf8 23.exd5 c5 24.Na4 Rac8 25.Rc1 c4 26.Bxc4 Bxd4 27.Bxd4 b5 28.Bxb5 Rxc1 29.Bxa6 Rxd5 30.Be3 Ra1

Jan-04-11  SufferingBruin: I, for one, like the puzzles where the enemy king is face-to-face with the heavy artillery <and> has one of his escape squares covered.

Wait, I wrote that yesterday, right? :)

And yeah, dang skippy I got it!

Jan-04-11  sarayu: For a split second I thought black was played by John Coltrane. Now that would have been interesting!
Jan-04-11  King.Arthur.Brazil: Well, new year, old puzzle... but very easy... Txh7+, Th1+ f5++. No more then 5 secs. Good! Embraces. Happy newyear everybody!
Jan-04-11  SamAtoms1980: 20 Rxh7+!! Kxh7 21 Rh1+ Kg6 22 f5#.

Mated by a PAWN!

Jan-04-11  hedgeh0g: I guess this is "Rxh7+" week... :P
Jan-05-11  Eduardo Leon: Let's have fun unnecessarily prolonging the inevitable mate:

<20.♖xh7+ ♔xh7 21.g6+? (!)>

It looks like a "mistake" any newbie would make, turning the mate in three into a mate in five.

<21...♔xg6 22.f5+ ♔h5>

At this point, even the newbie would play 23.♖h1+ ♔g4 24.f3#. The more sophisticated player would have found some aesthetic pleasure in not giving check: 23.f3 or 23.♔g3. But I am going to prolong the game even further.

<23.♗f7+? (!)>

The least aesthetically pleasing of the game-prolongers, because the reply is forced.

<23...♖xf7 24.♘d5? (!)>

Yes. I know what you're thinking. What the fudge?

<24...♘e5>

Preventing the devastating effects of the still threatened 25.♖h1+ ♔g4 26.f3+.

Another interesting possibility was 24...g5 25.♖h1+ ♔g4 26.♗xg5? (!) ♔xg5 27.♔g3 cxd5 28.f4#.

<25.♔g3>

Now this move is forced. Otherwise black might save his king with 25...♔g4.

<25...♘g6>

Now threatening 26...♘h4 and 27...g5, forcing white to stop arbitrarily prolonging the nonsense.

<26.♘xf6+? (!)>

The last joke, although this shares with move 23 the honor of being the least funny one, again, because the reply is forced.

<26...gxf6>

Or 26...♖xf6.

<27.♖h1+ ♘h4 28.♖xh4#>

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