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Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 12:22 am
by Paloma
.
of this position:
.
[d] 6k1/6rp/6p1/6N1/3B4/8/8/K7 b - - 0 3

black to move: 3...Rb7 and than? (pv-line please)

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 5:31 am
by MikeB
Paloma wrote:
Fri Sep 27, 2019 12:22 am
.
of this position:
.
[d] 6k1/6rp/6p1/6N1/3B4/8/8/K7 b - - 0 3

black to move: 3...Rb7 and than? (pv-line please)
This information is now freely available on the internet - no need to ask for it.

https://syzygy-tables.info/?fen=6k1/6rp ... _b_-_-_0_1

then download the pgn file


Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 10:08 am
by Paloma
Online Syzygy is a mess. It's crap.
Not the shortest way to mate.

In your pgn 11.Nb1? is -8# (11...g3 8#), best is 11.Kb2 -12# (6 men Nalimov),
your 12.Nd2 (-6#) lost another move, best: 12.Kb2 -7# (12...g2 7#)
13.Nb1? best is 13.Kb1
After 13.Nb1 is g1Q mate in 4, not your 13...h4 (mate in 7)

In your pgn after 15.Nb1 is h2 wrong, best g1Q+
After your h2 is 16.Nc3 best, not your Nd2
18.Nb1 wrong, best is 18.Kb2 Qc1+ 19.Ka2 Qxd2#

Therfore i asket to Lomonosov. :)

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 10:50 am
by Paloma
btw. 7...h5 is mate in 28 according to Houdini 6

so the syzygy line 16.Nb1 Qxb1# is a crap.

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 10:57 am
by MikeB
Paloma wrote:
Fri Sep 27, 2019 10:08 am
Online Syzygy is a mess. It's crap.
Not the shortest way to mate.

In your pgn 11.Nb1? is -8# (11...g3 8#), best is 11.Kb2 -12# (6 men Nalimov),
your 12.Nd2 (-6#) lost another move, best: 12.Kb2 -7# (12...g2 7#)
13.Nb1? best is 13.Kb1
After 13.Nb1 is g1Q mate in 4, not your 13...h4 (mate in 7)

In your pgn after 15.Nb1 is h2 wrong, best g1Q+
After your h2 is 16.Nc3 best, not your Nd2
18.Nb1 wrong, best is 18.Kb2 Qc1+ 19.Ka2 Qxd2#

Therfore i asket to Lomonosov. :)
I had not looked closely - but you are correct - sorry.

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 11:10 am
by velmarin
You have the free lomonosov app for android,
https://play.google.com/store/apps/deta ... ovtb&hl=en

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 11:35 am
by Paloma
i don't have a smartphone

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 11:40 am
by Cumnor

Code: Select all

1	Rg7b7	31	6	h5	0
2	Rg7d7	34	7	Rg7f7	0
3	Rg7c7	37	8	Kg8f8	0
4	Rg7e7	52	9	Kg8h8	0
5	h6	0	10	Rg7a7	-38

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 11:48 am
by velmarin
Paloma wrote:
Fri Sep 27, 2019 11:35 am
i don't have a smartphone
You can install it on PC, with an emulator like NOX, it also works.
https://www.bignox.com

Re: Lomonosov - what is the mate-distance...

Posted: Fri Sep 27, 2019 12:36 pm
by Paloma
Many Thanks Cumnor. 8-)