It appears that the configuration of all the variants I added still needs fixing in index.js. I never realized that he AI's evaluation is controlled from there, and always just cloned the same game definition, only changing the build scripts and filenames of visuals and such. But I just found out that the weights of the various evaluation terms are controlled in the property config.model.gameOptions, in a property levelOptions.
It appears that the version I cloned was referring to config_model_gameOptions_2, which is a setting for Shatranj or mini variants, and doesn't award advance of passers very much. Most of the variants would need the settings used for classic-chess.
It appears that the configuration of all the variants I added still needs fixing in index.js. I never realized that he AI's evaluation is controlled from there, and always just cloned the same game definition, only changing the build scripts and filenames of visuals and such. But I just found out that the weights of the various evaluation terms are controlled in the property config.model.gameOptions, in a property levelOptions.
It appears that the version I cloned was referring to config_model_gameOptions_2, which is a setting for Shatranj or mini variants, and doesn't award advance of passers very much. Most of the variants would need the settings used for classic-chess.