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Redundant knight
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Louis Zulli



Joined: 08 Jan 2007
Posts: 4831
Location: PA USA

PostPost subject: Thanks    Posted: Fri Jun 20, 2014 1:27 pm Reply to topic Reply with quote

I really appreciate your many posts concerning evaluation. Although I haven't read each one---there are quite a few, after all Very Happy ---I've thought about many of them.

Now please don't take this the wrong way, but the main effect of your posts has been to convince me that this is not the way to go. Too many terms, too much hidden overlap (non-orthogonality), too many artifacts of the human approach to chess, motivated by our very limited search abilities.

At a fundamental level, it seems to me that evaluation comes down to mobility and attack. Even the material value of pieces is simply more or less an encapsulation of their mobilities. Admittedly this is overly simplistic (and focused on the opening and midgame), but a position is good for us if we can move to lots of squares and if we attack a lot of enemy material. After all, the goal of the game is to reduce the opponent's mobility to zero while simultaneously attacking his most valuable piece!

You've almost inspired me to revisit my primitive engine and, after improving the basic move generation and search, to focus on an evaluation based on mobility + attacking. Mostly as an academic exercise, since any engine I create would be just for fun (and also pretty weak).
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Subject Author Date/Time
Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 10:38 am
      Re: Redundant knight H.G.Muller Fri Jun 20, 2014 11:03 am
            Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 11:54 am
                  Re: Redundant knight H.G.Muller Fri Jun 20, 2014 4:01 pm
      Re: Redundant knight Lucas Braesch Fri Jun 20, 2014 11:21 am
            Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 12:03 pm
      Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 11:37 am
      Re: Redundant knight Louis Zulli Fri Jun 20, 2014 11:50 am
            Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 12:13 pm
                  Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 12:36 pm
                        Thanks Louis Zulli Fri Jun 20, 2014 1:27 pm
                              Re: Thanks Lyudmil Tsvetkov Fri Jun 20, 2014 2:09 pm
                                    Re: Thanks Arjun Temurnikar Fri Jun 20, 2014 2:32 pm
                                    Re: Thanks Louis Zulli Fri Jun 20, 2014 4:12 pm
                                    Re: Thanks Louis Zulli Fri Jun 20, 2014 4:21 pm
                                          Re: Thanks Lyudmil Tsvetkov Fri Jun 20, 2014 4:30 pm
                                    Re: Thanks Robert Hyatt Sat Jun 21, 2014 2:51 am
                                          Re: Thanks Lyudmil Tsvetkov Sat Jun 21, 2014 6:53 am
      Re: Redundant knight Arjun Temurnikar Fri Jun 20, 2014 1:41 pm
            Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 2:26 pm
                  Re: Redundant knight Arjun Temurnikar Fri Jun 20, 2014 3:03 pm
                        Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 3:40 pm
                              Re: Redundant knight Arjun Temurnikar Fri Jun 20, 2014 4:43 pm
            Re: Redundant knight Joerg Oster Fri Jun 20, 2014 2:33 pm
                  Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 3:12 pm
                        Re: Redundant knight Arjun Temurnikar Fri Jun 20, 2014 3:19 pm
                              Re: Redundant knight Arjun Temurnikar Fri Jun 20, 2014 3:35 pm
                                    Re: Redundant knight Lyudmil Tsvetkov Fri Jun 20, 2014 3:51 pm
                                    Re: Redundant knight Lucas Braesch Fri Jun 20, 2014 6:47 pm
                                          Re: Redundant knight Arjun Temurnikar Fri Jun 20, 2014 7:23 pm
                                                Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 1:31 am
                                                      Re: Redundant knight Bernhard Bauer Sat Jun 21, 2014 5:31 am
                                                            Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 6:57 am
                                                      Re: Redundant knight H.G.Muller Sat Jun 21, 2014 7:54 am
                                                            Re: Redundant knight Matthew R. Brades Sat Jun 21, 2014 8:04 am
                                                                  Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 8:57 am
                                                            Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 8:48 am
                                                                  Re: Redundant knight H.G.Muller Sat Jun 21, 2014 9:19 am
                                                                        Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 10:00 am
      Re: Redundant knight Bernhard Bauer Sat Jun 21, 2014 5:22 am
            Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 7:07 am
                  Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 9:30 am
                        Re: Redundant knight H.G.Muller Sat Jun 21, 2014 9:45 am
                              Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 10:21 am
                                    Re: Redundant knight H.G.Muller Sat Jun 21, 2014 11:31 am
                                          Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 11:38 am
                                          Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 11:38 am
                                                Re: Redundant knight H.G.Muller Sat Jun 21, 2014 11:52 am
                                                      Re: Redundant knight Arjun Temurnikar Sat Jun 21, 2014 2:23 pm
                              Re: Redundant knight Kevin Hearn Sat Jun 21, 2014 10:30 am
                                    Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 11:16 am
                                          Re: Redundant bishop Bernhard Bauer Sat Jun 21, 2014 11:36 am
                                                Re: Redundant bishop Lyudmil Tsvetkov Sat Jun 21, 2014 12:10 pm
                                                      Re: Redundant bishop H.G.Muller Sat Jun 21, 2014 12:16 pm
                                          Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 11:59 am
                                                Re: Redundant knight Lyudmil Tsvetkov Sat Jun 21, 2014 12:58 pm
                                          Re: Redundant knight H.G.Muller Sat Jun 21, 2014 12:11 pm
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