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Subject: The usefull-ness of PVS

Author: Michel Langeveld

Date: 07:15:20 01/13/04


Just wanted to share a number.
I tested TSCP with and without PVS.

The difference is : 24.3% - 39.0%

To be precise the TSCP version I used has:
- killers
- history killers
- alfa beta
- no hashtables
- no nullmove

Opening position Gothic Chess:
rnbqckabnr/pppppppppp/10/10/10/10/PPPPPPPPPP/RNBQCKABNR w KQkq -

without PVS

6    215    305037    -10  b1c3 b8c6 i1h3 i8h6 e2e4 e7e5
7   1575   2511295     18  b1c3 b8c6 i1h3 i8h6 e2e4 e7e5 f2f4

with PVS

6    190    261471    -10  b1c3 b8c6 i1h3 i8h6 e2e4 e7e5
7   1192   1889545     18  b1c3 b8c6 i1h3 i8h6 e2e4 e7e5 f2f4

boostup of 24.3%

Tactical position in Gothic Chess (38.4%)
r1q2r2k1/p1p1p3pp/10/5p1p2/2P2P3P/2PC3PK1/P2B1Nc3/1R1Q5R w - -

without PVS
6    595    903139   -486  i3j3 h5h4 d1j7 i8j7 j3i4 g2h2 i4h4 f8d8 j1d1 d8d3
d2d3
7   4065   6253437  -9990  i3j3 h5h4 d1j7 i8j7 j3i4 c8e8 i4i5 g2i2 i5j5 e8h5

with PVS
6    525    817502   -486  i3j3 h5h4 d1j7 i8j7 j3i4 g2h2 i4h4 f8d8 j1d1 d8d3
f2d3
7   2481   3947446  -9990  i3j3 h5h4 d1j7 i8j7 j3i4 c8e8 i4i5 g2i2 i5j5 e8h5

boostup of 39.0%

For the source read next post



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