Author: KarinsDad
Date: 11:45:01 07/24/00
Go up one level in this thread
On July 24, 2000 at 14:23:19, KarinsDad wrote: >On July 24, 2000 at 13:30:06, Jari Huikari wrote: > >>On July 24, 2000 at 13:01:36, John Coffey wrote: >> >>>Only slightly related to the GUI is having a range of abilities from beginner >>>up to the top level that can be fine tuned. >> >>>I tried it on Chessmaster 6000, all the levels 1600 and below were dropping >>>pieces, and the next level up was smashing me at speed chess (my quick rating >>>is 1978.) >> >>I have thought about how this could be done. One idea that came into my >>mind was simply to put some delay routine into search to make it slower >>and thus playing weaker. >> >> Jari > > >I do not think those types of solutions work, i.e. less time, fewer nodes, lower >depth, etc. The program will still play relatively strong until some other >algorithm takes over (i.e. the below 1600 drop piece problem that John noted). > >What you need is a chess engine that generates multiple ply 1 PVs. Then, it >could randomly pick a different PV each move. > >So, for example, if it had 5 PVs that it could choose from, at 2600 setting it >would always pick PV 1 each time. At 2400 setting, it would occasionally pick >the PV 2 move. At 2200, it would pick PV 1 45%, PV 2 45%, PV 3 10%. At 1600, it >might pick PV 1 20%, PV 2 20%, PV 3 20%, PV 4 20%, PV 5 20%. > >Then, the computer would not be dropping pieces, even at a 1000 setting (even >though 1000 players often do drop a piece). But, it would rarely be playing the >best move in those positions at the lower settings. > >Of course, you would have to add in some logic that the scores of the PVs could >not be that drastically different. For example, NxB would normally result in PxN >as PV 1. If PV 2 did not have a similar PV score to PV 1 (i.e. there were no >waiting moves that do not lose the bishop), then the program would still make >the PV 1 move, regardless of setting. > >KarinsDad :) I forgot to mention that lowering the depth in conjunction with this type of solution would be optimal. It doesn't make sense to pick a PV 5 move that avoids a capture 14 ply down that is also avoided by PV 1 through 4. If the setting is 1200 rating, then the program should not generally be seeing more than 4 to 6 ply down before deciding on it's PVs. KarinsDad :)
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