Dmitri: My answer is that nobody forces you to play these small versions. Serious Pente players can play Pente and other users [especially WebTV owners who cannot display THAT big board - 19x19] will be happy with Small Pente.
Please don't forget that you are not the only one who asks me for new games and features. I receive tens of requests each day and I would like to make this site for everyone.
Fencer-- good point about the WEB TV board. I did not realize that they cannot use the large board. But may I make a suggestion? Why not kep the restriction on the small board? The restriction is an integral part of the game and is an official rule of the game. The game could be played on the 13X13 board while still maintaining the restriction, and then all users would be able ot play and everyone would be playing with the correct rules.