Use separated research counters in root_search()
authorMarco Costalba <mcostalba@gmail.com>
Sun, 7 Mar 2010 08:02:34 +0000 (10:02 +0200)
committerMarco Costalba <mcostalba@gmail.com>
Sat, 13 Mar 2010 10:00:12 +0000 (11:00 +0100)
One for failing highs and one for failing lows, this
should reduce average window size in case of positions
that fail first high and then low (or the contrary).

After ~2000 games on Joona's quad we have:

Mod - Orig: 1012- 975 (+6 elo)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

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