[d]r5r1/p4p2/2ppb1kp/7N/qp2RPB1/7P/PP1Q1B2/n5K1 w - - 0 1
But later it was discovered to be mate-in-8 with best play. Solution not posted so you can try the brain teaser yourself. If you want the solution, almost any engine will provide it in less than second, so please, let others enjoy the puzzle as you did.
September 16th, 1872 , John Blackburne announced mate-in-16
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Re: September 16th, 1872 , John Blackburne announced mate-in
Here's an end game composition by GM Jan Timman - I like it because it is instructive as well as its natural look.
[d] 3R4/B7/8/8/p7/n7/pp5K/k7 w - - 0 1
one clue - it's a mate-in-5.
Again, please don't post the solution so others may enjoy it as well.
[d] 3R4/B7/8/8/p7/n7/pp5K/k7 w - - 0 1
one clue - it's a mate-in-5.
Again, please don't post the solution so others may enjoy it as well.
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Re: September 16th, 1872 , John Blackburne announced mate-in
What do you want me to do, PM my proposed solution .MikeB wrote:Here's an end game composition by GM Jan Timman - I like it because it is instructive as well as its natural look.
[d] 3R4/B7/8/8/p7/n7/pp5K/k7 w - - 0 1
one clue - it's a mate-in-5.
Again, please don't post the solution so others may enjoy it as well.
There is players' forum, I think it is more appropriate if this is posted there.
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Re: September 16th, 1872 , John Blackburne announced mate-in
I admit defeat. I can't find it.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Re: September 16th, 1872 , John Blackburne announced mate-in
The trick is to use the bishop and the king in a series of blocking moves , blocking the check from the black's rook ,and walk the black king over to the white King ensnare the mate. Don't feel bad , crafty could not find it either in the couple of minutes I allowed itDann Corbit wrote:I admit defeat. I can't find it.
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Re: September 16th, 1872 , John Blackburne announced mate-in
Take an old version of crafty and turn off null move - "null 0" at the command line
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Re: September 16th, 1872 , John Blackburne announced mate-in
I will do a few more tries myself before I ask the computer for help.
I am reinvigorated to try it.
I am reinvigorated to try it.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Re: September 16th, 1872 , John Blackburne announced mate-in
Crafty-25dev got it almost instantaneously here:MikeB wrote:The trick is to use the bishop and the king in a series of blocking moves , blocking the check from the black's rook ,and walk the black king over to the white King ensnare the mate. Don't feel bad , crafty could not find it either in the couple of minutes I allowed itDann Corbit wrote:I admit defeat. I can't find it.
Code: Select all
Crafty v25.0 (20 cpus)
White(1): setb r5r1/p4p2/2ppb1kp/7N/qp2RPB1/7P/PP1Q1B2/n5K1 w - - 0 1
White(1): d
+---+---+---+---+---+---+---+---+
8 |<R>| . | | . | | . |<R>| . |
+---+---+---+---+---+---+---+---+
7 |<P>| | . | | . |<P>| . | |
+---+---+---+---+---+---+---+---+
6 | | . |<P>|<P>|<B>| . |<K>|<P>|
+---+---+---+---+---+---+---+---+
5 | . | | . | | . | | . |-N-|
+---+---+---+---+---+---+---+---+
4 |<Q>|<P>| | . |-R-|-P-|-B-| . |
+---+---+---+---+---+---+---+---+
3 | . | | . | | . | | . |-P-|
+---+---+---+---+---+---+---+---+
2 |-P-|-P-| |-Q-| |-B-| | . |
+---+---+---+---+---+---+---+---+
1 |<N>| | . | | . | |-K-| |
+---+---+---+---+---+---+---+---+
a b c d e f g h
White(1): st 300
search time set to 300.00.
White(1): go
time surplus 0.00 time limit 5:00 (5:00)
depth time score variation (1)
starting thread 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 <done>
16 1.11/5:00 Mat09 1. Rxe6+ Kh7 2. Qd3+ Rg6 3. Rxg6 fxg6
4. Qxd6 Qd1+ 5. Bxd1 gxh5 6. Qd7+ Kg8
7. Bd4 Kf8 8. Bxh5 Nc2 9. Qf7#
16-> 1.11/5:00 Mat09 1. Rxe6+ Kh7 2. Qd3+ Rg6 3. Rxg6 fxg6
4. Qxd6 Qd1+ 5. Bxd1 gxh5 6. Qd7+ Kg8
7. Bd4 Kf8 8. Bxh5 Nc2 9. Qf7# (s=2)
17 1.32/5:00 Mat08 1. Rxe6+ Kh7 2. Qd3+ Rg6 3. Rxg6 fxg6
4. Qxd6 Qd1+ 5. Bxd1 gxh5 6. Qe7+ Kg6
7. Bxh5+ Kxh5 8. Qf7# (s=2)
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Re: September 16th, 1872 , John Blackburne announced mate-in
MikeB wrote:Here's an end game composition by GM Jan Timman - I like it because it is instructive as well as its natural look.
[d] 3R4/B7/8/8/p7/n7/pp5K/k7 w - - 0 1
one clue - it's a mate-in-5.
Again, please don't post the solution so others may enjoy it as well.
Mate in 5 or 9 ?
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Re: September 16th, 1872 , John Blackburne announced mate-in
Oops. Sorry for posting a solution...zullil wrote:Crafty-25dev got it almost instantaneously here:MikeB wrote:The trick is to use the bishop and the king in a series of blocking moves , blocking the check from the black's rook ,and walk the black king over to the white King ensnare the mate. Don't feel bad , crafty could not find it either in the couple of minutes I allowed itDann Corbit wrote:I admit defeat. I can't find it.
Code: Select all
Crafty v25.0 (20 cpus) White(1): setb r5r1/p4p2/2ppb1kp/7N/qp2RPB1/7P/PP1Q1B2/n5K1 w - - 0 1 White(1): d +---+---+---+---+---+---+---+---+ 8 |<R>| . | | . | | . |<R>| . | +---+---+---+---+---+---+---+---+ 7 |<P>| | . | | . |<P>| . | | +---+---+---+---+---+---+---+---+ 6 | | . |<P>|<P>|<B>| . |<K>|<P>| +---+---+---+---+---+---+---+---+ 5 | . | | . | | . | | . |-N-| +---+---+---+---+---+---+---+---+ 4 |<Q>|<P>| | . |-R-|-P-|-B-| . | +---+---+---+---+---+---+---+---+ 3 | . | | . | | . | | . |-P-| +---+---+---+---+---+---+---+---+ 2 |-P-|-P-| |-Q-| |-B-| | . | +---+---+---+---+---+---+---+---+ 1 |<N>| | . | | . | |-K-| | +---+---+---+---+---+---+---+---+ a b c d e f g h White(1): st 300 search time set to 300.00. White(1): go time surplus 0.00 time limit 5:00 (5:00) depth time score variation (1) starting thread 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 <done> 16 1.11/5:00 Mat09 1. Rxe6+ Kh7 2. Qd3+ Rg6 3. Rxg6 fxg6 4. Qxd6 Qd1+ 5. Bxd1 gxh5 6. Qd7+ Kg8 7. Bd4 Kf8 8. Bxh5 Nc2 9. Qf7# 16-> 1.11/5:00 Mat09 1. Rxe6+ Kh7 2. Qd3+ Rg6 3. Rxg6 fxg6 4. Qxd6 Qd1+ 5. Bxd1 gxh5 6. Qd7+ Kg8 7. Bd4 Kf8 8. Bxh5 Nc2 9. Qf7# (s=2) 17 1.32/5:00 Mat08 1. Rxe6+ Kh7 2. Qd3+ Rg6 3. Rxg6 fxg6 4. Qxd6 Qd1+ 5. Bxd1 gxh5 6. Qe7+ Kg6 7. Bxh5+ Kxh5 8. Qf7# (s=2)