Author: martin fierz
Date: 22:58:00 08/28/04
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On August 28, 2004 at 19:40:50, Robert Hyatt wrote: >On August 28, 2004 at 18:40:43, martin fierz wrote: > >>aloha! >> >>after all the cloning talk, here's something to test your favorite engine with: >>i played a weakish IM today and got the following position after 56...Qg6+ >>57.Kf2: >> >>[D] 8/6kp/8/3p4/1P4q1/P4p2/5K2/4Q3 b - - 0 57 >> >>it took me a couple of seconds to see that after 57...Qh4+ 58. Kf1 Qxe1+ 59. >>Kxe1 Kf6 black is completely winning due to the floating square (it's nice to >>see that reading dvoretzky is some good!) and so i played that and won :-) >> >>interestingly, when i entered this game in chessbase running fritz7 in the >>background, fritz didn't seem to see this at all within a minute or so. so >>question to all: how long does your favorite engine need to see the line ...Qh4+ >>Kf1 Qxe1+ with a HUGE plus score (i.e. +9 or so - that is what my assessment of >>the position was after a couple of seconds...)? >> >>i don't want to claim that this is the only win, but it is by far the easiest >>one, and fritz 7 misses it completely. >> >>cheers >> martin > > >Crafty instantly says Qg2+ is +6 here, it sees the queen trade in a different >way than your check. > > 6 0.13 -5.61 1. ... Qg2+ 2. Ke3 f2 3. Qxf2 d4+ 4. > Ke2 d3+ 5. Ke3 Qxf2+ 6. Kxf2 Kf6 7. > a4 > 6-> 0.13 -5.61 1. ... Qg2+ 2. Ke3 f2 3. Qxf2 d4+ 4. > Ke2 d3+ 5. Ke3 Qxf2+ 6. Kxf2 Kf6 7. > a4 hi bob, in the above line of crafty it does indeed see a queen trade in a different way, but i must add the line given there is in fact a win for white! perhaps you should check your split passer vs connected passer eval for this case :-) > 7 0.18 -5.53 1. ... Qg2+ 2. Ke3 Kf8 3. Qb1 Qe2+ > 4. Kf4 Qe4+ 5. Qxe4 dxe4 6. Ke3 h5 > 7. Kxe4 ...while this time it's working, and this is an alternative win, as are the other lines given later. cheers martin
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