Susan Polgar
November 17, 2012
Chess Improvement, Chess Puzzles, General News, Major Tournaments, Women's Chess
9 Comments
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R-g8+ with P-g4# to follow later
1.f4+ Kxf4 2.g3+ Kg5 3.Rg8+ Kh5 4.Re5 and mate follows.
Alas, Pia missed it, the cruelties of rapid chess…
Tricky little puzzle. I got lost in the 1.Rg8 line for a while, but the black king escapes to f4. Took a bit to see how to take this away:
1. f4! Kf4 (Kh5 2.Rf5#)
2. g3 Kg5 (Kf3 3.Rf5#)
And, now, Rg8 will work:
3. Rg8 Kh5 (Rg7 no better)
4. Re5!
The hardest move for me to find- pins the f-pawn and threatens g4# while threatening Rxf5#,too. Continuing:
4. …..Rg7 (Rg6 5.Rf5)
5. Rg7 Rg6
6. Rf5 Rg5
7. g4#
f4 Kf4
g3 Kg5
Rg8 Kh5
Re5 splat
1.f4+ Kxf4
(1.-Kh5 2.Rxf5++)
2.g3+ Kg5
(2.-Kf3 3.Rxf5++)
3.Rg8+ Kh5 4.Re5 (threatening 5.g4++) Rg7 5.Rxg7 Rg6
(5.-Ra3 6.Rxf5++)
6.Rxf5+ Rg5 7.g4++
1 f4+ K:f4; 2 g3+ Kg5; 3 Rg8+ Kh5; 4 Re5!! and chess mate is in arrival!
Very impressive !
Have to drive the Black King to the edge, and divert the f5 pawn, somehow,
1. f4+ Kf4:
2. g3+ Kg5
3. Rg8+ Kh5
4. Re5 winning.
It would actually interest me to see how many people can find this “in real time”. Surely f4+ is one of those Invisible Moves that may be hard to spot even at standard time controls. Whereas, chess engines see it instantly—thus I’m sure my model overstates the probability of its being played. But I would love to have data on how much…
I agree with Kenneth Regan that it is very difficult to find the winning move in real time. Practically every other move looks more promising initially. Fritz 13 found the solution in less than 2 seconds.
What made it “invisible” for me was that Kf4 was part of a combination (Rg8+ Kf4) that I already had tried and dismissed as not promising. Obviously, not a good reason.
I should have a look at the “Invisible Chess Moves: Discover Your Blind Spots and Stop Overlooking Simple Wins” by Neiman and Afek. Looks interesting. Highly rated by readers. Perhaps my blindness was in the “Anticipation of the probable result” category they discuss. Haven’t read it yet, so don’t know.