September 16th, 1872 , John Blackburne announced mate-in-16

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rabbits23
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Location: Randwick Australia

Re: September 16th, 1872 , John Blackburne announced mate-in

Post by rabbits23 »

Komodo 9 says mate in 9. It's fairly clever whether it's mate in 5 or 9
Allan
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MikeB
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Location: Pen Argyl, Pennsylvania

Re: September 16th, 1872 , John Blackburne announced mate-in

Post by MikeB »

My bad - mate in 9. From the book "The Art of the Endgame" by GM Jan Timman.
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Dann Corbit
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Location: Redmond, WA USA

Re: September 16th, 1872 , John Blackburne announced mate-in

Post by Dann Corbit »

Not a mate in 5.
Mate in 8 looks like a bug.
Chest says it is a mate in 9.
[d]3R4/B7/8/8/p7/n7/pp5K/k7 w - - acn 4293953; acs 11; bm Rd1+; ce 32750; dm 9; pv Rd1+ Nb1 Rh1 a3 Bg1 Nc3 Bd4+ Nb1 Kg1 Nc3 Kf2+ Nb1 Ke1 Nc3 Bxc3 Kb1 Kd2#;
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.
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Robert Flesher
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Re: September 16th, 1872 , John Blackburne announced mate-in

Post by Robert Flesher »

zullil wrote:
zullil wrote:
MikeB wrote:
Dann Corbit wrote:I admit defeat. I can't find it.
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 it
Crafty-25dev got it almost instantaneously here:

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&#40;1&#41;&#58; st 300
search time set to 300.00.
White&#40;1&#41;&#58; go
        time surplus   0.00  time limit 5&#58;00 &#40;5&#58;00&#41;
        depth     time       score   variation &#40;1&#41;
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&#58;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&#58;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# &#40;s=2&#41;
         17     1.32/5&#58;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# &#40;s=2&#41;
Oops. Sorry for posting a solution...


and to the wrong endgame :)
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