Unless you know what I am responding to, just skip this post as it is a bit off-topicwhat tobe and tbest say just doesn't make sense, I would like to hear what do they define as "skill"
I think what we said made sense, but maybe it was presented in a confusing way, I am going to try again.
The point was that Chess and tic-tac-toe is the same kind of game. The ones that are solvable, and a player can memorize the perfect way to play it. They can know how to DO something, while not knowing WHY it works. (In chess they know how to play an opening, but not why the other player can't just take the "free" pawn.)
An unskilled (or less skilled) player can therefore use chessbase* and find a weakness in the GM opening, and thus beating him, while the GM clearly is the most skilled chess player. This happens regularly.
Back to what skill is. Generally skill is the ability to excel at something. Therefore, simplified, it is whoever wins the game that has the most skill. In realty it is more complicated. Broken down skill relates to WHY the player made the moves he did. This can be very hard to measure, because you need the player to explain his reasoning. To illustrate here are a few examples.
1. A player sacrifices a Knight on h6. Either he is skilled a has seen a forced mate. Or he is unskilled and forgot about the pawn on g7.
2. Carlsen v. Topalov in Norway chess. Carlsen lost on time in a won position (he din't know the time was non- default.) In the game Carlsen has the most skill, but he still lost.
If you can't tell about a players skill over moves made or points scored then how do you do it? You could look on more games, more moves and investigate a long term trend/result. But that still doesn't tell you what skill is, only who has skill. You could say skill in chess is about tactics, calculations, evaluation of position like king safety, activity, pawn structure, knowledge of openings , middelgames and endgames. But at the same time skill somehow includes so much more. So I can't really find a good definition... and I have to stick to one that I know is wrong . Skill is the ability to excel at something. Or even simpler, Skill= Winning.
*Chessbase, if you are not familiar with it, is a program that contains many millions of games from many players, tourneys etc. and the tools to analyze them.
EDIT: Another point is that since chess is a solvable game, and starts in the same position evrytime any player can just copy any other players. That is anyone can play Carlsens opening, and moves while not having his skill. Or what a computer would do.
Edited 6/24/2015 19:10:11