Author: leonid
Date: 15:03:10 11/15/01
Go up one level in this thread
On November 15, 2001 at 12:05:46, Paul wrote: >On November 15, 2001 at 11:45:39, leonid wrote: > >>On November 15, 2001 at 09:44:55, Paul wrote: >> >>>On November 15, 2001 at 09:09:08, leonid wrote: >>> >>>>[D]2nkN3/2nqN3/2rrbb2/RBqQQqQQ/RBqNPqPQ/2qpqp2/3B4/3K4 w - - >>>> >>>>Please indicate your result. >>>> >>>>Thanks, >>>>Leonid. >>> >>>Hi Leonid, >> >>Hi! >> >>>Haha! .. that was a surprise when I saw what Pretz came up with: >>> >>>1. Nexc6+ Qcxc6 2. Qgxf6+ Qxf6 3. Qexf6+ Qxf6 4. Qxf6+ Qe7 5. Qxe7+ Nxe7 6. >>>Nxe6+ Nxe6 7. Ra8+ Nc8 8. Rxc8+ Kxc8 9. Nxd6+ Kd8 10. Ra8+ Qxa8 11. Qxa8+ Qc8 >>>12. Qe8+ Kc7 13. Qexc8+ Kb6 14. Qa5# >>> >>>So a mate in 14! I think I must have a bug ... >> >>I don't think so. It is mate in 13. Verified it 12 moves deep by brute force to >>be sure. Easy branching factor. Found mate in 13 by selective. Your, probably, >>went just one move deper to find its mate. Good result. > >Just after I posted my message mine also found a mate in 13 ... I was just too >quick, but I had to laugh out loud because I know you don't post mates over 13 >moves deep! I thought maybe you had changed your solver. No still my solver goes only 13 moves deep. Only when I will start rewriting it that I expect to push it somehow farther. With all wonderful machines that came and still been coming, next few levels in mate solving will be natural. I expect that very soon 64 bits machine from Intel and AMD will speed everything around but will be reduced to dimension of our pocket-book. >>I see that you have almost no competition here. Your selective look like to be >>very effective. I still hope that somebody will come with Chess Master solution >>to see better your and mine position. >> >>What was your time here? > >07:28 WM13 13 Nexc6+ Qcxc6 Qgxf6+ Qxf6 Qexf6+ Qxf6 Qxf6+ Ne7 Ra8+ Nxa8 Rxa8+ >Qxa8 Qxa8+ Qcc8 Ba5+ Qcc7 Bxc7+ Qxc7 Nxe6+ Rxe6 Qhd5+ Rd6 Qfxd6+ Qxd6 Qxd6# > >So no bug, mine just took the long way home first ... Even when selective find mate in 14 when shortest mate is in 13, result is good. >>Mine by brute force took 1 hour and 50 min for 12 moves to say "No". Selective >>in 13, took 9 seconds. > >That's pretty fast ... :) Cheers, Leonid. >>Cheers, >>Leonid. > >Paul
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