Author: Robert Hyatt
Date: 10:54:44 11/09/05
Go up one level in this thread
On November 08, 2005 at 03:04:55, Renze Steenhuisen wrote: >On November 08, 2005 at 01:21:03, Will Singleton wrote: > >>On November 07, 2005 at 17:14:45, Rob Basham wrote: >> >>>[D]6r1/p1pq1p1p/1p1p1Qnk/3PrR2/2n1P1PP/P1P5/4R3/6K1 w - - 0 1 >>> >>>Well, it is easy for Fidelity Mach 3.....:-) >>> >>>Mach 3 at level one finds all the correct moves to this mate in 11....! >>> >>>Beginning with....Rh5+ >>> >>>How does your machine do on this one...? >>> >>>Rob >> >>Oddly, Crafty 20.0 bh cannot solve this. Bug? does it happen in the latest >>crafty? > >Can someone elaborate on what the +1, +3, and +M mean? I have no time to look >into it in the source code. Just too lazy ... > >Cheers, Renze! > 8-> 1.29 -5.31 1. h5 Rxf5 2. exf5 Qd8 3. Qxd8 Rxd8 > 4. hxg6 fxg6 5. fxg6 Kxg6 > 9 2.25 +1 1. h5!! > 9 3.34 +3 1. h5!! > 9 4.81 +M 1. h5!! > 9 9.68 0.01 1. h5 Rxf5 2. exf5 Qd8 3. g5+ Kxh5 > 4. Rh2+ Kg4 5. Rg2+ Kf3 6. Rf2+ Kg3 > 7. Rg2+ Kf3 > 9-> 10.74 0.01 1. h5 Rxf5 2. exf5 Qd8 3. g5+ Kxh5 > 4. Rh2+ Kg4 5. Rg2+ Kf3 6. Rf2+ Kg3 > 7. Rg2+ Kf3 > 10 13.59 0.01 1. h5 Rxf5 2. exf5 Qd8 3. g5+ Kxh5 > 4. Rh2+ Kg4 5. Rg2+ Kf3 6. Rf2+ Kg3 > 7. Rg2+ Kf3 > 10-> 15.45 0.01 1. h5 Rxf5 2. exf5 Qd8 3. g5+ Kxh5 > 4. Rh2+ Kg4 5. Rg2+ Kf3 6. Rf2+ Kg3 > 7. Rg2+ Kf3 > 11 20.39 0.01 1. h5 Rxf5 2. exf5 Qd8 3. g5+ Kxh5 > 4. Rh2+ Kg4 5. Rg2+ Kf3 6. Rf2+ Kg3 > 7. Rg2+ Kf3 > 11-> 22.78 0.01 1. h5 Rxf5 2. exf5 Qd8 3. g5+ Kxh5 > 4. Rh2+ Kg4 5. Rg2+ Kf3 6. Rf2+ Kg3 > 7. Rg2+ Kf3 > 12 30.26 0.01 1. h5 Rxf5 2. exf5 Qd8 3. g5+ Kxh5 > 4. Rh2+ Kg4 5. Rg2+ Kf3 6. Rf2+ Kg3 > 7. Rg2+ Kf3 > 12 1:14 +1 1. Rg5!! > 12 1:18 +3 1. Rg5!! > 12 1:42 +M 1. Rg5!! > 12 2:12 3.96 1. Rg5 Qxg4+ 2. Rxg4 Rge8 3. Rh2 Ne3 > 4. h5 Nxg4 5. hxg6+ Nxh2 6. gxf7+ Kh5 > 7. fxe8=Q+ Rxe8 8. Qf7+ Kg4 9. Qd7+ > Kg3 10. Qxe8 Nf3+ 11. Kf1 > 12-> 2:14 3.96 1. Rg5 Qxg4+ 2. Rxg4 Rge8 3. Rh2 Ne3 > 4. h5 Nxg4 5. hxg6+ Nxh2 6. gxf7+ Kh5 > 7. fxe8=Q+ Rxe8 8. Qf7+ Kg4 9. Qd7+ > Kg3 10. Qxe8 Nf3+ 11. Kf1 > 13 2:34 4.15 1. Rg5 Qxg4+ 2. Rxg4 Rge8 3. Rh2 Ne3 > 4. h5 Nxg4 5. hxg6+ Rh5 6. Rxh5+ Kxh5 > 7. Qf5+ Kh6 8. gxf7 Rf8 9. Qe6+ Kg7 > 10. Qxg4+ Kxf7 11. Qd7+ Kg6 12. Qxc7 > 13 2:37 +1 1. Rh5+!! > 13 2:41 +3 1. Rh5+!! > 13 2:45 +M 1. Rh5+!! > 13 4:38 Mat11 1. Rh5+ Rxh5 2. g5+ Rxg5+ 3. hxg5+ > Kh5 4. Rh2+ Nh4 5. Qh6+ Kg4 6. Qxh4+ > Kf3 7. Rf2+ Ke3 8. Qg3+ Kxe4 9. Qf3+ > Ke5 10. Re2+ Ne3 11. Rxe3# > 13-> 4:40 Mat11 1. Rh5+ Rxh5 2. g5+ Rxg5+ 3. hxg5+ > Kh5 4. Rh2+ Nh4 5. Qh6+ Kg4 6. Qxh4+ > Kf3 7. Rf2+ Ke3 8. Qg3+ Kxe4 9. Qf3+ > Ke5 10. Re2+ Ne3 11. Rxe3# Sure. +1 means that the score was above the fairly narrow aspiration window used at the root of the tree. Normally iteration N+1 uses score +/- .4 or so, where score comes from iteration N. The +1 means we are adding +1.0 to the upper bound and re-searching, which means at least the score is +.4 better than expected. The +3 means that the +1.0 search failed high as well, meaning the real score is greater than previous best score +1.0, so now we add another +2.0 to it. The +M means that the search failed high on the score+3.0 search, so we are winning a piece or more. So we set the upper bount to +Mate and this time we are going to get a good score back. :)
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