.
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)
Lomonosov - what is the mate-distance...
Moderators: hgm, Rebel, chrisw
-
- Posts: 1167
- Joined: Thu Dec 25, 2008 9:07 pm
- Full name: Herbert L
-
- Posts: 4889
- Joined: Thu Mar 09, 2006 6:34 am
- Location: Pen Argyl, Pennsylvania
Re: Lomonosov - what is the mate-distance...
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
[pgn][Event ""]
[Site "https://syzygy-tables.info/?fen=6k1/6rp ... _b_-_-_0_1"]
[Date "2019.09.27"]
[Round "-"]
[White "Syzygy"]
[Black "Syzygy"]
[Result "0-1"]
[Annotator "syzygy-tables.info"]
[FEN "6k1/6rp/6p1/6N1/3B4/8/8/K7 b - - 0 1"]
[SetUp "1"]
{ DTZ 3 } 1... Rb7 2. Nf3 h6 { KBNvKRPP with DTZ -2 } 3. Ne1 g5 { KBNvKRPP with DTZ -4 } 4. Be3 Rb5 5. Nc2 h5 { KBNvKRPP with DTZ -4 } 6. Na3 Rb3 7. Nb1 g4 { KBNvKRPP with DTZ -2 } 8. Nd2 Rxe3 { KNvKRPP with DTZ -2 } 9. Nb1 g3 { KNvKRPP with DTZ -2 } 10. Nd2 g2 { KNvKRPP with DTZ -2 } 11. Nb1 h4 { KNvKRPP with DTZ -2 } 12. Nd2 h3 { KNvKRPP with DTZ -2 } 13. Nb1 h2 { KNvKRPP with DTZ -2 } 14. Nd2 g1=Q+ { KNvKQRP with DTZ -2 } 15. Ka2 h1=Q { KNvKQQR with DTZ -2 } 16. Nb1 Qxb1# { Checkmate } 0-1[/pgn]
-
- Posts: 1167
- Joined: Thu Dec 25, 2008 9:07 pm
- Full name: Herbert L
Re: Lomonosov - what is the mate-distance...
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.
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.
-
- Posts: 1167
- Joined: Thu Dec 25, 2008 9:07 pm
- Full name: Herbert L
Re: Lomonosov - what is the mate-distance...
btw. 7...h5 is mate in 28 according to Houdini 6
so the syzygy line 16.Nb1 Qxb1# is a crap.
so the syzygy line 16.Nb1 Qxb1# is a crap.
-
- Posts: 4889
- Joined: Thu Mar 09, 2006 6:34 am
- Location: Pen Argyl, Pennsylvania
Re: Lomonosov - what is the mate-distance...
I had not looked closely - but you are correct - sorry.Paloma wrote: ↑Fri Sep 27, 2019 12:08 pm 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.
-
- Posts: 1600
- Joined: Mon Feb 21, 2011 9:48 am
Re: Lomonosov - what is the mate-distance...
You have the free lomonosov app for android,
https://play.google.com/store/apps/deta ... ovtb&hl=en
https://play.google.com/store/apps/deta ... ovtb&hl=en
-
- Posts: 1167
- Joined: Thu Dec 25, 2008 9:07 pm
- Full name: Herbert L
Re: Lomonosov - what is the mate-distance...
i don't have a smartphone
-
- Posts: 106
- Joined: Fri Jan 27, 2012 4:23 pm
- Location: Cumnor, Oxford, UK
- Full name: Kevin D Plant
Re: Lomonosov - what is the mate-distance...
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "0-1"]
[SetUp "1"]
[FEN "6k1/6rp/6p1/6N1/3B4/8/8/K7 b - -"]
1...Rb7 2.Nf3 h5 3.Ka2 Kf7 4.Ng5+ Ke7 5.Nf3 Rb5 6.Bc3 Rf5 7.Ng1 h4 8.Kb3 g5 9.
Kc4 Ke6 10.Bd4 g4 11.Ne2 g3 12.Bb6 h3 13.Nxg3 h2 14.Bc7 Rf1 15.Nxf1 h1Q 16.Nd2
Qc1+ 17.Kd3 Qxc7 18.Nc4 Qd8+ 19.Kc3 Kd5 20.Nd2 Qc8+ 21.Kd3 Qe8 22.Kc2 Qe3 23.
Nb3 Qe2+ 24.Kc3 Qc4+ 25.Kb2 Qd3 26.Na5 Qd2+ 27.Kb1 Qxa5 28.Kc1 Qa2 29.Kd1 Kd4
30.Kc1 Kd3 31.Kd1 Qd2# 0-1[/pgn]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "0-1"]
[SetUp "1"]
[FEN "6k1/6rp/6p1/6N1/3B4/8/8/K7 b - -"]
1...Rb7 2.Nf3 h5 3.Ka2 Kf7 4.Ng5+ Ke7 5.Nf3 Rb5 6.Bc3 Rf5 7.Ng1 h4 8.Kb3 g5 9.
Kc4 Ke6 10.Bd4 g4 11.Ne2 g3 12.Bb6 h3 13.Nxg3 h2 14.Bc7 Rf1 15.Nxf1 h1Q 16.Nd2
Qc1+ 17.Kd3 Qxc7 18.Nc4 Qd8+ 19.Kc3 Kd5 20.Nd2 Qc8+ 21.Kd3 Qe8 22.Kc2 Qe3 23.
Nb3 Qe2+ 24.Kc3 Qc4+ 25.Kb2 Qd3 26.Na5 Qd2+ 27.Kb1 Qxa5 28.Kc1 Qa2 29.Kd1 Kd4
30.Kc1 Kd3 31.Kd1 Qd2# 0-1[/pgn]
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
Moderator of Rybka forum (Site no longer active)
Admin of Infinitychess playing server and Forum (Site suspended, maybe be back in the Future)
Admin of Infinitychess playing server and Forum (Site suspended, maybe be back in the Future)
-
- Posts: 1600
- Joined: Mon Feb 21, 2011 9:48 am
Re: Lomonosov - what is the mate-distance...
-
- Posts: 1167
- Joined: Thu Dec 25, 2008 9:07 pm
- Full name: Herbert L
Re: Lomonosov - what is the mate-distance...
Many Thanks Cumnor.