[d]8/5N1k/5B1p/2p1pK2/3pB3/6pp/8/3q3B w - - 0 1
Most engines i tried found a mate in 14 or mate in 15, except for FireBird 1.2, which found this mate in 13.
[Event ""]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "[?"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/5N1k/5B1p/2p1pK2/3pB3/6pp/8/3q3B w - - 0 1"]
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Nxe5 Qxf6+ 5.Kxf6 h5 6.Bed5+ Kh8 7.Kf7 g2 8.Bfxg2 hxg2 9.Bxg2 Kh7 10.Be4+ Kh6 11.Kf6 h4 12.Nf7+ Kh5 13.Bf3# {Mate} 1-0
I'm not sure 5...h5 is best though. Any other engines find this line?
Interesting mate problem
Moderator: Ras
-
govert
- Posts: 270
- Joined: Thu Jan 15, 2009 12:52 pm
Re: Interesting mate problem
Stockfish after:
5.Kxf6:
19 00:47 105.185.383 2.216.622 -M8 5. ... h5 6.Bd5+ Kh8 7.Kf7 g2 8.Bxg2 hxg2 9.Bxg2 Kh7 10.Be4+ Kh6 11.Kf6 h4 12.Nf7+ Kh5 13.Bf3+
19 00:47 105.185.383 2.216.622 -M10 5. ... g2 6.Bd5+ Kh7 7.Bfe4+ Kh8 8.Bxg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3+
5.Kxf6:
19 00:47 105.185.383 2.216.622 -M8 5. ... h5 6.Bd5+ Kh8 7.Kf7 g2 8.Bxg2 hxg2 9.Bxg2 Kh7 10.Be4+ Kh6 11.Kf6 h4 12.Nf7+ Kh5 13.Bf3+
19 00:47 105.185.383 2.216.622 -M10 5. ... g2 6.Bd5+ Kh7 7.Bfe4+ Kh8 8.Bxg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3+
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David Dahlem
- Posts: 900
- Joined: Wed Mar 08, 2006 9:06 pm
Re: Interesting mate problem
I get this from FireBird 1.2 after 5.Kxf6:govert wrote:Stockfish after:
5.Kxf6:
19 00:47 105.185.383 2.216.622 -M8 5. ... h5 6.Bd5+ Kh8 7.Kf7 g2 8.Bxg2 hxg2 9.Bxg2 Kh7 10.Be4+ Kh6 11.Kf6 h4 12.Nf7+ Kh5 13.Bf3+
19 00:47 105.185.383 2.216.622 -M10 5. ... g2 6.Bd5+ Kh7 7.Bfe4+ Kh8 8.Bxg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3+
23 01:19 133.603.193 1.672.000 +M8 h6h5 Be4d5+ Kg8h8 Kf6f7 g3g2 Bf3xg2 h3xg2 Bd5xg2 Kh8h7 Bg2e4+ Kh7h6 Kf7f6 h5h4 Ne5f7+ Kh6h5 Be4f3+
23 01:19 133.603.193 1.672.000 +M8 g3g2 Be4d5+ Kg8h8 Bf3xg2 h3xg2 Bd5xg2 Kh8g8 Bg2d5+ Kg8h7 Kf6f7 d4d3 Kf7f8 c5c4 Bd5e4+ Kh7h8 Ne5f7+
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govert
- Posts: 270
- Joined: Thu Jan 15, 2009 12:52 pm
Re: Interesting mate problem
and what does firebird say after
5. ... g2 6.Bd5+ Kh7
?
5. ... g2 6.Bd5+ Kh7
?
-
David Dahlem
- Posts: 900
- Joined: Wed Mar 08, 2006 9:06 pm
Re: Interesting mate problem
FEN: 8/7k/5K1p/2pBN3/3p4/5B1p/6p1/8 w - - 2 7govert wrote:and what does firebird say after
5. ... g2 6.Bd5+ Kh7
?
FireBird 1.2:
26 02:06 272.721.459 2.152.000 +M8 Bf3e4+ Kh7h8 Be4xg2 h3xg2 Bd5xg2 h6h5 Kf6f7 Kh8h7 Bg2e4+ Kh7h6 Kf7f6 h5h4 Ne5f7+ Kh6h5 Be4f3+
-
David Dahlem
- Posts: 900
- Joined: Wed Mar 08, 2006 9:06 pm
Re: Interesting mate problem
[d]8/5N1k/5B1p/2p1pK2/3pB3/6pp/8/3q3B w - - 0 1
According to ChestUCI, this is a mate in 15 -
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Nxe5 Qxf6+ 5.Kxf6 g2 6.Bed5+ Kh7 7.Bfe4+ Kh8 8.Bexg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3#
So all those engines that say mate in 13 or mate in 14 are wrong.
According to ChestUCI, this is a mate in 15 -
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Nxe5 Qxf6+ 5.Kxf6 g2 6.Bed5+ Kh7 7.Bfe4+ Kh8 8.Bexg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3#
So all those engines that say mate in 13 or mate in 14 are wrong.
-
zullil
- Posts: 6442
- Joined: Tue Jan 09, 2007 12:31 am
- Location: PA USA
- Full name: Louis Zulli
Re: Interesting mate problem
Crafty-23.2 claims Mate-in-15 after about ten minutes (at an almost unbelievable 38M nps).David Dahlem wrote:[d]8/5N1k/5B1p/2p1pK2/3pB3/6pp/8/3q3B w - - 0 1
Code: Select all
Crafty v23.2 (8 cpus)
White(1): egtb=off
White(1): setboard 8/5N1k/5B1p/2p1pK2/3pB3/6pp/8/3q3B w - - 0 1
White(1): st 3600
search time set to 3600.00.
White(1): display stats
display statistics at end of each search.
White(1): display
+---+---+---+---+---+---+---+---+
8 | | . | | . | | . | | . |
+---+---+---+---+---+---+---+---+
7 | . | | . | | . |-N-| . |<K>|
+---+---+---+---+---+---+---+---+
6 | | . | | . | |-B-| |<P>|
+---+---+---+---+---+---+---+---+
5 | . | |<P>| |<P>|-K-| . | |
+---+---+---+---+---+---+---+---+
4 | | . | |<P>|-B-| . | | . |
+---+---+---+---+---+---+---+---+
3 | . | | . | | . | |<P>|<P>|
+---+---+---+---+---+---+---+---+
2 | | . | | . | | . | | . |
+---+---+---+---+---+---+---+---+
1 | . | | . |<Q>| . | | . |-B-|
+---+---+---+---+---+---+---+---+
a b c d e f g h
White(1): go
time limit 60:00 (+0.00) (60:00)
depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
starting thread 4
starting thread 5
starting thread 6
starting thread 7
10 0.03 +1 1. Ke6+!
10 0.04 0.02 1. Ke6+ Kg8 2. Ke7 Qc1 3. Nxe5 Qxh1
4. Bxh1 g2 5. Bxg2 hxg2 6. Nf3 (s=3)
10-> 0.06 0.02 1. Ke6+ Kg8 2. Ke7 Qc1 3. Nxe5 Qxh1
4. Bxh1 g2 5. Bxg2 hxg2 6. Nf3 (s=5)
11 0.06 +1 1. Ke6+!
11 0.08 0.01 1. Ke6+ Kg8 2. Nxh6+ Kf8 3. Be7+ Kg7
4. Nf5+ Kh8 5. Bf6+ Kg8 6. Nh6+ (s=4)
11-> 0.12 0.01 1. Ke6+ Kg8 2. Nxh6+ Kf8 3. Be7+ Kg7
4. Nf5+ Kh8 5. Bf6+ Kg8 6. Nh6+ (s=3)
12 0.15 +1 1. Ke6+!
12 0.15 +3 1. Ke6+!
12 0.16 +M 1. Ke6+!
12 0.18 3.27 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf3 5. Bxf3 h5 6. Bd5+ Kh7
7. Nf7 g2 8. Ng5+ Kg6 9. Nxh3 (s=2)
12-> 0.23 3.27 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf3 5. Bxf3 h5 6. Bd5+ Kh7
7. Nf7 g2 8. Ng5+ Kg6 9. Nxh3 (s=4)
13 0.23 +1 1. Ke6+!
13 0.28 4.33 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h2 6. Kf5 Kg7
7. Kg4 Kf6 8. Nd7+ Ke7 9. Kxg3 Kxd7
10. Kxh2 (s=3)
13-> 0.40 4.33 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h2 6. Kf5 Kg7
7. Kg4 Kf6 8. Nd7+ Ke7 9. Kxg3 Kxd7
10. Kxh2 (s=3)
14 0.41 +1 1. Ke6+!
14 0.55 5.38 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h2 6. Bd5+ Kh7
7. Bfe4+ Kh8 8. Nf7+ Kg8 9. Nxh6+ Kf8
10. Nf5 c4 11. Nxd4 (s=2)
14-> 0.85 5.38 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h2 6. Bd5+ Kh7
7. Bfe4+ Kh8 8. Nf7+ Kg8 9. Nxh6+ Kf8
10. Nf5 c4 11. Nxd4 (s=3)
15 1.24 5.38 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 c4 6. Nxc4 h5
7. Ke5 h2 8. Bxh5 Kg7 9. Kxd4 (s=2)
15-> 2.01 5.38 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 c4 6. Nxc4 h5
7. Ke5 h2 8. Bxh5 Kg7 9. Kxd4 (s=3)
16 2.03 +1 1. Ke6+!
16 2.05 +3 1. Ke6+!
16 2.82 7.07 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 c4 6. Bd5+ Kh8
7. Bxc4 h5 8. Nf7+ Kh7 9. Ng5+ Kh8
10. Nxh3 h4 11. Bg2 (s=2)
16-> 4.47 7.07 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 c4 6. Bd5+ Kh8
7. Bxc4 h5 8. Nf7+ Kh7 9. Ng5+ Kh8
10. Nxh3 h4 11. Bg2 (s=3)
17 4.52 +1 1. Ke6+!
17 6.52 7.54 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h2 6. Bd5+ Kh7
7. Bf7 g2 8. Bxg2 Kh8 9. Ng4 d3 10.
Nxh2 d2 (s=2)
17-> 10.60 7.54 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h2 6. Bd5+ Kh7
7. Bf7 g2 8. Bxg2 Kh8 9. Ng4 d3 10.
Nxh2 d2 (s=3)
18 10.65 +1 1. Ke6+!
18 15.45 8.06 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h5 6. Bxh5 g2
7. Bf7+ Kh8 8. Ng6+ Kh7 9. Nf4+ Kh6
10. Nxh3 d3 11. Bxd3 c4 12. Bfxc4 (s=2)
18-> 24.63 8.06 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 h5 6. Bxh5 g2
7. Bf7+ Kh8 8. Ng6+ Kh7 9. Nf4+ Kh6
10. Nxh3 d3 11. Bxd3 c4 12. Bfxc4 (s=3)
19 45.13 -1 1. Ke6+?
19 45.21 7.70 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh8
7. Nf7+ Kg8 8. Ng5+ Kh8 9. Nxh3 d3
10. Bxg2 d2 11. Nf2 h5 12. Nd1 h4 (s=2)
19-> 1:17 7.70 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh8
7. Nf7+ Kg8 8. Ng5+ Kh8 9. Nxh3 d3
10. Bxg2 d2 11. Nf2 h5 12. Nd1 h4 (s=16)
20 1:17 +1 1. Ke6+!
20 1:47 8.20 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh8
7. Nf7+ Kg8 8. Ng5+ Kh8 9. Nxh3 g1=B
10. Nxg1 d3 11. Bc4 d2 12. Bd1 Kh7
13. Bd3+ Kg8 (s=15)
20-> 2:35 8.20 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh8
7. Nf7+ Kg8 8. Ng5+ Kh8 9. Nxh3 g1=B
10. Nxg1 d3 11. Bc4 d2 12. Bd1 Kh7
13. Bd3+ Kg8 (s=2)
21 4:25 7.98 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh8
7. Nf7+ Kg8 8. Ng5+ Kh8 9. Nxh3 d3
10. Bxg2 d2 11. Bgf3 h5 12. Bd1 h4
13. Ng5 h3 14. Nxh3
21-> 8:19 7.98 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh8
7. Nf7+ Kg8 8. Ng5+ Kh8 9. Nxh3 d3
10. Bxg2 d2 11. Bgf3 h5 12. Bd1 h4
13. Ng5 h3 14. Nxh3 (s=4)
22 8:21 +1 1. Ke6+!
22 8:22 +3 1. Ke6+!
22 8:22 +M 1. Ke6+!
22 10:42 Mat15 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh7
7. Bfe4+ Kh8 8. Bxg2 hxg2 9. Bxg2 Kg8
10. Bd5+ <HT> (s=3)
22-> 16:30 Mat15 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh7
7. Bfe4+ Kh8 8. Bxg2 hxg2 9. Bxg2 Kg8
10. Bd5+ <HT> (s=4)
23 23:18 Mat15 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh7
7. Bfe4+ Kh8 8. Bxg2 <HT> (s=3)
23-> 40:11 Mat15 1. Ke6+ Kg8 2. Ke7 Qc1 3. Bhf3 Qf4
4. Nxe5 Qxf6+ 5. Kxf6 g2 6. Bd5+ Kh7
7. Bfe4+ Kh8 8. Bxg2 hxg2 9. Bxg2 <HT>
(s=4)
time=60:00 mat=-3 n=137859734852 fh=95% nps=38.3M
extensions=1996.2M qchecks=1415.8M reduced=2219.4M pruned=2593.9M
predicted=0 evals=1229.7M 50move=0 EGTBprobes=0 hits=0
SMP-> splits=9318681 aborts=266977 data=68/1024 elap=60:00
terminating SMP processes.
mate in 15 moves.
White(1): Ke6+
time used: 60:00
-
PawnStormZ
- Posts: 880
- Joined: Mon Feb 15, 2010 6:43 am
Interesting mate problem
Spark sees the mate in 15 after 2 1/2 minutes...
Analysis by spark-0.3a:
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Bd5 Qxf6+ 5.Kxf6 g2 6.Nxe5+ Kh7 7.Bfe4+ Kh8 8.Bxg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3#
² (0.34) Depth: 3/8 00:00:00
+- (#15) Depth: 22/47 00:02:29 638mN
Analysis by spark-0.3a:
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Bd5 Qxf6+ 5.Kxf6 g2 6.Nxe5+ Kh7 7.Bfe4+ Kh8 8.Bxg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3#
² (0.34) Depth: 3/8 00:00:00
+- (#15) Depth: 22/47 00:02:29 638mN
-
Jouni
- Posts: 3621
- Joined: Wed Mar 08, 2006 8:15 pm
- Full name: Jouni Uski
Re: Interesting mate problem
I got it much faster:
Analysis by spark-0.3a:
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Nxe5 Qxf6+ 5.Kxf6 g2 6.Bd5+ Kh7 7.Bfe4+ Kh8 8.Bxg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3#
+- (#15) Depth: 19/48 00:01:21 220mN
Chest is again helpless- we need 64 bit SMP version!
Jouni
Analysis by spark-0.3a:
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Nxe5 Qxf6+ 5.Kxf6 g2 6.Bd5+ Kh7 7.Bfe4+ Kh8 8.Bxg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3#
+- (#15) Depth: 19/48 00:01:21 220mN
Chest is again helpless- we need 64 bit SMP version!
Jouni
-
Zagalo
- Posts: 102
- Joined: Tue Jan 12, 2010 9:20 am
Re: Interesting mate problem
Even after 10+ minutes ChestUCI 5.1 cannot find anythingDavid Dahlem wrote: According to ChestUCI, this is a mate in 15 -
1.Ke6+ Kg8 2.Ke7 Qc1 3.Bhf3 Qf4 4.Nxe5 Qxf6+ 5.Kxf6 g2 6.Bed5+ Kh7 7.Bfe4+ Kh8 8.Bexg2 hxg2 9.Bxg2 Kg8 10.Bd5+ Kh7 11.Kf7 h5 12.Be4+ Kh6 13.Kf6 h4 14.Nf7+ Kh5 15.Bf3#
So all those engines that say mate in 13 or mate in 14 are wrong.
Naum 4.1 finds mate in 15 in 3 seconds !