Blunder checking using just opening books

[giovanni]

On a somewhat related topic to engine book construction, I was wondering, if I would blunder-check a pgn file just using opening books, is there any tool that would help me in doing this task? I mean, I would like to see if any major mistake was made in the opening without using engines, just book evaluation. Thanks in advance.
Giovanni

[hgm]

This seems impossible in principle. Opening books usually contain no scores, just moves it wants you to play. And if a move is not in the book, it doesn't necessarily mean it is a blunder. Just that you are out of book.

[giovanni]

This seems impossible in principle. Opening books usually contain no scores, just moves it wants you to play. And if a move is not in the book, it doesn't necessarily mean it is a blunder. Just that you are out of book.

Thanks for your answer and for clarifying matters. Then, is there any resource like the ChessOK Opening Tree that could be used for this purpose:

http://chessok.com/?page_id=352

[Ozymandias]

This seems impossible in principle. Opening books usually contain no scores, just moves it wants you to play. And if a move is not in the book, it doesn't necessarily mean it is a blunder. Just that you are out of book.

The only book format I'm familiar with, that doesn't contain scores, is Polyglot.

[hgm]

Ctg books do not contain scores.

I don't know which other books have known format.

[Ozymandias]

This seems impossible in principle. Opening books usually contain no scores, just moves it wants you to play. And if a move is not in the book, it doesn't necessarily mean it is a blunder. Just that you are out of book.

Thanks for your answer and for clarifying matters. Then, is there any resource like the ChessOK Opening Tree that could be used for this purpose:

http://chessok.com/?page_id=352

That's just a database statistics presentation, there's a good number of GUIs that will allow you to browse as a tree, whatever DB you want.

The problem is twofold, however:
1- You need a world-class DB, to obtain from it better info than the one an engine will give you.
2- You need awful amounts of time to manually check a PGN, unless it only contains a few games. Automatic blunder check should be available, but I don't recall any GUI offering it.

[Ozymandias]

Ctg books do not contain scores.

I don't know which other books have known format.

Of course they do, it's the info in the second column (%).

[hgm]

You seem tomean something different with scores than I do. The data you refer to is just statistics derived from the number of wins, draws and losses in the game database on which the book is based. They are not centi-Pawns calculated by an engine.

[Ozymandias]

You seem tomean something different with scores than I do. The data you refer to is just statistics derived from the number of wins, draws and losses in the game database on which the book is based. They are not centi-Pawns calculated by an engine.

If I'm interpreting the OT's meaning correctly, that's what he wants ("book evaluation"). That's certainly the most popular way, to blunder-check a game or PGN, using a book.

[hgm]

Usually you would not incorporate blunders in the book, however. So you are left only with moves that do slightly better or slightly worse, and playing a blunder would just get you out of book.