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Murray Chandler vs Ian Rogers
2nd Commonwealth-ch (1984), Hong Kong, Mar-??
Scandinavian Defense: Main Lines. Mieses Variation (B01)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
Jul-01-07  Madman99X: Chessgames.com, not to nitpick, but move 22 should read Bb3+ :-)
Jul-01-07  TrueBlue: ok, difficulty insane!
I have always been a little crazy, so maybe I have a shot. Black's only obvious weakness is the pinned king and must be exploited quick! So d5 springs out I believe white has good response in two cases:

e.g.

16. d5 cxd5 17. Bb5+ Nc6 18. Ne5 is one line

16. d5 o-o 17. dxe6 is another

white seems to have small advantage in both.

Of course, if you are looking for deep analyzes, I am the wrong guy ...

Happy CANADA day everybody!

Jul-01-07  erli: Is 18 f5 forced? It seems like bad move.....
Jul-01-07
Premium Chessgames Member
  An Englishman: Good Afternoon: I got as far as Chandler's 19th move and decided that this was the line to play. There is a tempting but lesser continuation at the 18th move: 18.Ne5?!,Qf6; 19.Bg5,Qxg5; 20.Nxf7,Qf6; 21.Nxh8,Ke7; 22.a3,Ba5; 23.b4,Bb6; 24.Re1,Nd7 and the Knight seems to be in trouble.
Jul-01-07  Checker2: Happy Canada Day, indeed!

<erli 18 ... f5?> Wouldpusher already answered this, eh.

Jul-01-07
Premium Chessgames Member
  patzer2: With the decoy exchange sacrifice 16. Rxb1!! White begins a series of decoys and deflections to harass the Black Queen and expose the Black King to a withering attack.
Jul-01-07  beginner64: The candidate moves are: Ne5, Kg2, Nh4, Rxb1.

Kg2 directly threatens Rxb1. In response, black could counterattack the bishop on f4 with Qf6. Be5 attacks the queen, enabling Rxb1.

Now the question is, what have I missed, since that doesn't reach the "Insane" category by any chance.. Time to look.

Jul-01-07  beginner64: Obviously, what I missed was:
16. Kg2 Be4 (a simple retreat).
Jul-01-07  simsan: <fezzik> by move 23 white actually has several good options. My computer actually prefers 23.Nd2 (eval +9.xx) .. suggesting the line:
23. Nd2 Nd7 24. Qf3+ Nf6 25.Bxf6 Bxd2 26. Be5+ Ke8 27. Bxc7 winning the queen (and m8 will quickly follow).
Jul-01-07
Premium Chessgames Member
  fm avari viraf: In spite of its intrique possibilities, I could sense that Black's Queen seems to be jeopardy & so my first try was 15.Ne5 if Qf6 then 16.Qe3 threatening Bg5! Now, 15...Qe4 then 16.Rxb1 Qxb1+ 17.Kg2 & the Black Queen will be running for her life. I'm happy that I was on the right track as Chandler. Happy Canada Day to all & will someone throw some light on it?
Jul-01-07  dzechiel: <Checker2 <dzechiel - 16 Ne5 Qe4 17 Rxb1 Qxb1+?> Black has a better rook capture. 17 ... Qxh8# so the queen is doing the trapping rather than getting trapped!>

Yikes! I can't believe I overlooked that! This did seem too easy. Thanks for the correction.

Jul-01-07  IMDONE4: I wonder if Ian was in time trouble or something, because generally you don't play into force mate, then resign before your opponent moves.
Jul-01-07  Crowaholic: My first candidate move is 16. Bb5!?

After 16. ..cxb5 17. Rc8+ Kd7? 18. Rxh8, White should win on material grounds. 18. ..Bd3 fails to Ne5+ and whereever the king goes, Nxg6 is now a check, so while Black loses his queen, White keeps his queen.

Problem #1: After 17. ..Ke7 18. Rc7+ Kd8 19. Ne5 Qe4! 20. Nxf7+ Ke8 21. Qxe4 Bxe4, I don't see any White advantage, e.g. 22. Nxh8 Bxh1 23. Rc8+ Kd7 24. Rxb8 Rxb8 25. Bxb8

So Bb5 does not seem to be the move, or not yet.

Next candidate is 16. Rxb1, doesn't seem to be much use, but I have a hard time finding other forcing moves. Let's see. 16. Rxb1 Qxb1+ 17. Kg2 (seems less passive than Ne1) and now this does have a nice property: The black queen is absolutely forced to go back to g6. Peril lurks on every other reachable square. So

17 ..Qg6 Maybe we can exploit on this theme. Attacking the Q with the knight seems to be no use, though. But 18. Bd3 and now 18. ..Qf6 19. Bg5 and the Q is "checkmated". Then again, Black has 18. ..f5

Now 19. Bxf5 Qf7 20. Ng5 and it seems like things are getting tough for Black, but I'm too tired to calculate all the relevant lines. Taking a peek...

Hmm. Black played 19. ..Qf6. Now 20. Bg5 Qf8 21. Bxe6 looks very strong, intuitively. Now White is attacking both K and Q, and the passive Black rooks and knight are no help. All this for the equivalent of a single pawn (B + P vs R). Taking another peek... Well, almost except that Black played 20. ..Qf7 followed by 21. ..Qc7. I'm too tired to even fully understand the rest of the solution, let alone finding the best moves on my own. All I can say by glancing over the remaining moves is that Black seems to be very much on the defensive by now. And Black resigned because of 26. Qxe7+ Qxe7 27. Rxe7# - very nice mating set-up by Chandler!

Jul-01-07  Jake Robertson: Awesome Puzzle
Jul-01-07  LIFE Master AJ: It WAS a great puzzle!

I found the key move in a short amount of time, but did it in a weird way.

I wanted to play Nh4, but Black had the defense of ...Qe4. This lead me to want to get rid of the Black Bishop on b1 ASAP.

So I played Rxb1! But then after ...QxR/b1+; Kg2, I notice that Nh4 is useless ... or at least, not so great. But that's OK, because now I think I am on the right track now. (I like the capture on b1 because it gains a tempo, which is important because the Black King is still in the center. [The Morphy Principle.] I also notice (now) I have both 18.a3, and 18.Bd3. (At first, I cannot decide which one is better.) I finally choose 18.Bd3, because it is more direct ... my biggest weakness is getting too tricky ... at least, as concerns these puzzles.

BTW, 18...f5 is 100% forced. (As far as a human thinks, anyway.) Otherwise 18.Bd3, Qf6?; 19.Bg5, and the Black Queen is lost. (Which is what I was trying to do in the first place, trap the lady.)

Jul-02-07  whatthefat: It's frightening to admit, but I used almost exactly the same method of analysis on this problem as <LMAJ>.
Jul-02-07
Premium Chessgames Member
  kevin86: Awesome! How quickly and deeply the white bishops penetrate the black position. White's passive rook was far less valuable than black's active bishop and thus was expendable.
Jul-02-07  LIFE Master AJ: <whatthefat>
Great minds work alike?!?
Jul-02-07  whatthefat: Hmm.. Indeed. :)
Jan-15-09  LIFE Master AJ: "Why did Black resign?" (IM)

Like, are you kidding me? (Splat on e7.)

Jan-30-14
Premium Chessgames Member
  kingscrusher: Brutal win
Nov-15-15
Premium Chessgames Member
  Phony Benoni: Gotta love those Main Lines. No wonder I could never learn the openings.
Nov-15-15
Premium Chessgames Member
  Penguincw: Normally if I'm one of the first puzzles solvers of the day, I like to make some comments in general, but I got none today. Sorry to those who actually read them. :)

Back to this puzzle, OTB, I would've played 16.Ng5, but I had thoughts of sacrificing on e6. I also had a thought of an exchange sac on b1, but coming with check, I disregarded it.

Nov-15-15  nalinw: I got Rxb1 with the idea of trapping the queen - but didn't see the defense

... f5 .

No wonder the problem seemed far too easy for a Sunday!

Nov-15-15
Premium Chessgames Member
  patzer2: For today's Sunday puzzle, 16. Rxb1!! leads to a surprise attack which forces Black to succumb to a decisive attack on his King in order to save his Queen.

For an improvement for Black, instead of <10...Qxf6?!>, I'd start with Ian Roger's refinement 10... gxf6 in his win in Schmittdiel vs I Rogers, 1991.

Black's game takes a big turn for the worse with <12...Bxc2? 13. Rc1 > (+1.63 @ 21 depth, Deep Fritz 14). Instead, 12..h6 13. 0-0-0 (0.69 @ 21 depth) keeps hope alive.

White's follow-up is strong and clearly winning. However, Deep Fritz 14 indicates an even stronger follow-up than <23. Ne5 > is 23. Nd2! when play might continue 23...Nd7 (23... a6 24. Re1 ) 24. Qf3+ Nf6 25. Bxf6 gxf6 26. Qxf6+ Ke8 27. Re1+ Qe7 28. Qxh8+ Kd7 29. Rxe7+ Bxe7 30. Qxa8 with mate-in-nine.

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