Author: Pete Galati
Date: 18:00:23 01/18/01
Go up one level in this thread
On January 18, 2001 at 20:02:12, Paul wrote: >On January 18, 2001 at 19:51:06, Pete Galati wrote: > >>On January 18, 2001 at 19:13:22, Paul wrote: >> >>>On January 18, 2001 at 19:01:08, Pete Galati wrote: >>> >>>>On January 18, 2001 at 18:44:05, leonid wrote: >>>> >>>>>Hi! >>>>> >>>>>If you would like to find a mate here is one position. It is very easy to solve >>>>>but not that simple to find shortest mate. >>>>> >>>>>I failed here even in 3 hours to find shortest mate through brute force search. >>>>>Maybe you will have better chance. >>>>> >>>>> 1k4q1/1pppPr2/PbbP1N1n/QP2rn1R/1q6/1q2RBB1/q1q2PPP/6NK black to go >>>>> >>>>>Leonid. >>>> >>>>Is this the right position? >>>> >>>>[D]1k4q1/1pppPr2/PbbP1N1n/QP2rn1R/1q6/1q2RBB1/q1q2PPP/6NK b - - 0 1 >>> >>>If so, then mine says it's a mate in 10 for black starting with Nxg3+ ... >>>It looks like a daily reverse auction ... Anyone lower, anyone? :) >>> >>>Paul >> >>Crafty seems to say the same thing. I haven't run these moves passed a board to >>check to see if it really IS a forced mate, but I assume it is since Black keeps >>white in check the whole time. Just over 3 minutes. 48mb hashtable fwiw. >> >>Pete >> >> 8 3:13 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5 >> Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6. >> Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+ >> 9. Nxh3 Qf5+ 10. Kg3 Qxe3# >> 8-> 3:40 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5 >> Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6. >> Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+ >> 9. Nxh3 Qf5+ 10. Kg3 Qxe3# >> 9 5:45 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5 >> Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6. >> Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+ >> 9. Nxh3 Qf5+ 10. Kg3 Qxe3# >> 9-> 17:39 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5 >> Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6. >> Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+ >> 9. Nxh3 Qf5+ 10. Kg3 Qxe3# > >Yeah, this was the line 'Pretz' found: > >1... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5 Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ >6. Kh2 Ng4+ 7. Kg3 Qxe3+ 8. fxe3 Qf2+ 9. Kxg4 Qe6+ 10. Kg5 Qff5x > >If it's really a mate in 10 then the matesolvers will have a hard >time proving that I guess. It's quite a beautiful mate I think. > >Paul I suppose there's several ways to do this mate, Junior6 takes a different route than Crafty and Pretz Analysis by Junior 6.0: 1...Nxg3+! 2.hxg3 Rxh5+ 3.Nxh5 Qh4+ 4.gxh4 Qxg2+ 5.Bxg2 Bxg2+ 6.Kh2 Ng4+ 7.Kg3 Qxf2+ 8.Kxg4 Qe6+ 9.Rxe6 Qxe6+ 10.Kg5 Qc5# -+ (-#10) Depth: 11 00:01:53 78724kN Pete
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