• The expression syntax is similar to C-expressions including the order of evaluation.
• In relational expressions of the form key relop "val" the "val" must be quoted using double quotes.

Below an overview of the expression syntax and operators which can be used in these expressions.

Supported Keys

The key part of relational expressions is a selection of SGF keys (see SGF format) or any of a set of GoBase specific keys:

Sort Modes

The following sort modes are defined on the returned search page:

The secondary key is used when the primary key values match during the search. In some cases one would like to define 3rd and 4th sort keys, but the interface currently doesn't allow this. By default, the lists are sorted reversed by dt so the most recent games come first in the list.

Regarding the Generated Output

By default batches of 25 games maximum will be returned in order to limit network traffic. This number can be adjusted on the returned search page. Another note regarding the listings: if you search for, say Cho Chikun and the listing shows:

black	white	date	place	result	#mn	game
Yoshida Mika	Kobayashi Izumi	1997-12	JP	R	208

Then the game is a pair-go game with one of the players being the player you were looking for (in the example Yoshida Mika, 6p played with Cho Chikun, 9p against Kobayashi Izumi, 2p and Otake Hideo, 9p). The pairgo tournament overview pages will show this game as:

black team	white team	date	place	result	#mn	game
Yoshida Mika Cho Chikun	Kobayashi Izumi Otake Hideo	1997-12	JP	R	208

To achieve this select the bteam and wteam properties on the generated page and request a new listing to make all players in team matches visible. (In that case you might want to turn off Black/White player since they will be included in the team as well.)
From this page you can generate a listing of all games with more than one player with the search expression (just one example):

(pb2 != "" || pw2 != "")

GoBase stores up to 6 players of each team.