I am using the Automatic Analysis function of Arena Chess. A great way to analyze many positions without human interaction. Arena produces an log-file with the result of an analysis. In the first line of a new position being analyzed there are three numbers, the middle one is a puzzle for me. Here an example output:
1 - 0 1 Avoid move: Best move (SF16): Ng1-f3 Not found in: 00:00 1/1 00:00.001 247 247k +0.02 1.Nf3
In the first row, the leftmost 1 refers to the position count, the last number 1 is the move number, what is the 0 in the middle? The number in the middle is not always 0, other values are often seen too.