American Go E-Journal

Your Move/Readers Write: Crosstabs, explained

Saturday August 12, 2017

“I’m looking at the Crosstabs page on the AGA web site but there is insufficient information to make heads or tails of it,” writes Chuck Bell. “Is 2017.08.12_crosstab-screengrabthere an explanation of these tables anywhere? They don’t appear to me to be self-explanatory.”

The AGA Crosstab system is a very odd duck. It was really something that was semi-cobbled together and since then has had very few changes. In the current/existing system the page reads as: Player – ## (this is the number from the TD system), Rounds and results (Try hovering your cursor over the numbers, it will show you the name of their opponent), and overall result for the tournament. In the rounds columns the numbers display as something like “4B+”. This means that the the player’s row you’re looking at played player #4, they played as Black, and they won the game. If you look at player 4, it will show they played player X, played as White, and lost the game. Hovering over the result will again show you the name of the opponent.
The system is far from perfect but the reality is that we’re an all-volunteer organization and often have to settle for “good enough.” That said, we’d welcome anyone who’d like to jump in and help. Most of the software that the AGA uses is on GitHub. This set of code can be found here. Anyone who would like to work on projects like these, please email us at or
- Steve Colburn