Computer opening

[Ras]

Superior tactics flow from a superior position, but you have to earn that first. The minimum is to avoid bad positions and do somewhat useful moves. That is, in real games - as opposed to arbitrary test positions.

The pawn eval is nearly for free even if you put in quite some knowledge. That's what the pawn hash table is for.

[Uri Blass]

If I add more knowledge to evaluation it scores less on the WAC test. That means it would perform worse tactically. And tactics are very important in chess.

WAC test does not measure tactical ability of engines.

a lot of tactics is not about sacrifices and test suites are full of sacrifices.

[Ras]

Something else.. did you profile your engine? What is the percentage of static eval?

Just some numbers here: I ran GCC with gprof, and I got 13.66% for static eval. That has to be corrected because the profiler function itself takes 42.59% of the time, and if I subtract that, static eval takes 24% of the real program time.

Imagine I would put in a lot of additional stuff in static eval, let's say I would double its time, then what? The total program execution would raise by a factor of 1.24, obviously. Assuming 50 ELO per speed doubling, which is reasonable at that playing strength, that would cost 16 ELO points, tactically.

Now with doubling static eval, you certainly can put in more than 16 ELO. Engines don't get to depth by a bean counter static eval, but by cutting down the search tree in sophisticated ways.

[Henk]

Code: Select all

Depth  Value   Time(seconds)   Nodes
280    0.0400      47.22    11859293   b1c3 e7e6 e2e3 g8f6 g1f3 f8b4 f1e2 e8g8 e1g1 b8c6 a2a3 
270    0.1100      32.01     8273101   g1f3 e7e6 e2e3 g8f6 f1b5 a7a6 b5e2 f8b4 a2a3 b4a5 e1g1 
260    0.0700      51.06    12834472   e2e3 e7e6 g1f3 g8f6 f1e2 f8b4 a2a3 b4e7 b1c3 e8g8 e1g1 
250    0.0600      18.87     4816415   e2e3 e7e6 g1f3 g8f6 f1e2 f8b4 a2a3 b4e7 d2d4 e8g8 e1g1 
240    0.0000      25.06     6355205   e2e3 e7e6 b1c3 g8f6 g1f3 f8b4 f1e2 b7b6 e1g1 e8g8 f3g5 
230    0.1100       4.14     1049861   e2e3 e7e6 b1c3 g8f6 g1f3 b8c6 f1b5 f8b4 e1g1 e8g8 f3g5 
220    0.1400      10.73     2182208   b1c3 e7e6 e2e3 g8f6 g1f3 b8c6 f1b5 f8b4 e1g1 e8g8 f3g5 
210    0.0200       4.87     1237332   e2e3 e7e6 b1c3 g8f6 g1f3 b8c6 f1b5 f8e7 a2a3 e8g8 e1g1 
200    0.0800       6.65     1772814   d2d4 e7e6 g1f3 b8c6 e2e3 g8f6 f1d3 f8e7 e1g1 e8g8 
190    0.0500       2.59      592496   g1f3 e7e6 b1c3 g8f6 e2e3 f8b4 a2a3 b4c3 b2c3 e8g8 f3e5 
180    0.1000       2.66      641387   a2a3 e7e6 e2e3 b8c6 b1c3 g8f6 b2b3 b7b6 g1f3 
170    0.0400       0.90      247690   b1c3 e7e6 e2e3 g8f6 g1f3 f8b4 f1c4 d7d5 c4b5 
160    0.0600       0.89      237314   e2e4 e7e6 d2d4 g8f6 c1g5 d7d6 f1b5 c8d7 b5f1 
150    0.0800       0.38       64151   b1c3 e7e6 e2e3 b8c6 g1f3 g8f6 d2d4 b7b6 
140    0.1200       0.10       27097   g1f3 e7e6 e2e3 b8c6 b1c3 g8f6 d2d4 
130    0.0500       0.12       31552   b1c3 e7e6 e2e3 b8c6 g1f3 g8f6 d2d4 
120    0.0600       0.06       17482   d2d4 e7e6 e2e3 b8c6 b1c3 g8f6 
110    0.0800       0.03        8452   b1c3 e7e6 e2e3 b8c6 g1f3 g8f6 
100    0.1200       0.01        4435   g1f3 e7e6 e2e3 b8c6 b1c3 
 90    0.0700       0.02        4398   b1c3 e7e6 e2e3 b8c6 g1f3 
 80    0.0200       0.02        3125   d2d4 e7e6 e2e3 b8c6 
 70    0.0100       0.01        3290   a2a3 g8f6 e2e3 e7e6 
 60    0.1000       0.00         504   e2e3 e7e6 b1c3 
 50    0.1800       0.00         508   b1c3 e7e6 e2e3 
 40    0.0000       0.00         193   e2e3 e7e6 
 30    0.0200       0.01         328   d2d3 e7e6 
 20    0.2400       0.00          51   e2e3 
 10    0.1900       0.04          45   g1f3 

[Daniel Anulliero]

Pretty good depth but very strange pv , and strange moves choix : d3 e3 a3 lol

[Henk]

Code: Select all

Depth  Value   Time(seconds)   Nodes
380    0.0700     122.14    64252425   d2d4 g8f6 e2e3 e7e6 b1c3 d7d5 
370    0.1200      59.89    34444240   d2d4 d7d5 e2e3 e7e6 g1f3 f8b4 c2c3 b4d6 
360    0.0400      34.21    22272496   e2e3 e7e6 d2d4 g8f6 b1c3 d7d6 
350    0.1200       8.37     5601124   e2e4 e7e5 b1c3 d7d6 d2d4 e5d4 d1d4 b8c6 
340    0.2200      19.02    13348820   e2e4 d7d5 e4d5 d8d5 b1c3 d5e5 f1e2 e5g5 c3b5 b8a6 
330    0.0900       9.37     5669038   d2d4 d7d5 e2e3 e7e6 f1b5 c8d7 b5d7 b8d7 g1h3 f8b4 b1c3 b4c3 b2c3 c7c6 
320    0.0300       4.00     2815710   e2e4 d7d5 e4d5 d8d5 b1c3 d5e5 f1e2 e5g5 c3b5 
310    0.1000       1.50     1178743   e2e4 d7d5 e4d5 d8d5 b1c3 d5e5 f1e2 e5g5 e2b5 b8c6 b5f1 g5f4 
300    0.2400       5.72     3873470   e2e4 d7d5 e4d5 d8d5 b1c3 d5e5 f1e2 e7e6 d2d4 e5d6 
290    0.1000       0.61      441762   e2e3 e7e6 a2a4 d7d5 b2b3 f8c5 
280    0.0200       1.46     1046600   e2e3 e7e6 a2a4 d7d6 d2d4 d6d5 
270    0.1600       0.11       76580   d2d4 d7d5 e2e3 e7e6 f1b5 c8d7 b1a3 d7b5 a3b5 a7a6 
260    0.1600       0.10       76028   d2d4 d7d5 e2e3 e7e6 f1b5 c8d7 b1a3 d7b5 a3b5 a7a6 
250    0.1600       0.20      165191   d2d4 d7d5 e2e3 e7e6 f1b5 c8d7 b1a3 d7b5 a3b5 a7a6 
240    0.3400       0.24      196862   d2d4 e7e6 e2e4 f8b4 c2c3 b4a5 b1d2 c7c6 
230    0.3400       0.08       59637   d2d4 e7e6 e2e4 f8b4 c2c3 b4a5 b1d2 c7c6 
220    0.0000       0.21      109326   d2d4 d7d5 e2e3 e7e6 b1d2 a7a6 
210    0.0300       0.08       52156   d2d4 d7d5 e2e3 e7e6 b1d2 a7a6 
200    0.0500       0.13      117942   e2e3 e7e6 d2d4 d7d5 b1d2 a7a6 
190    0.3600       0.02        9521   d2d4 d7d5 e2e3 c7c6 b1d2 a7a6 
180    0.3600       0.02       13563   d2d4 d7d5 e2e3 c7c6 b1d2 a7a6 
170    0.3600       0.03       19722   d2d4 d7d5 e2e3 c7c6 b1d2 a7a6 
160    0.0000       0.01        9137   d2d4 d7d5 b1c3 c7c6 a1b1 a7a6 
150    0.0200       0.01        8150   e2e3 d7d5 b1a3 d5d4 e3d4 d8d4 a1b1 
140    0.0900       0.02       13916   d2d4 d7d5 b1c3 c7c6 a1b1 
130    1.0200       0.00        1086   e2e3 a7a6 b1a3 a6a5 a1b1 
120    1.0800       0.00        1003   e2e4 a7a6 b1a3 a6a5 
110    0.9600       0.00        1983   e2e3 a7a6 b1a3 a6a5 
100    0.0900       0.00        1055   h2h3 a7a6 b1a3 a6a5 
 90    0.0800       0.00         614   b2b3 a7a6 b1a3 
 80    0.0900       0.00         737   d2d3 a7a6 b1d2 
 70    0.0900       0.00         444   a2a3 a7a6 a1a2 
 60    0.0900       0.00         374   f2f4 a7a6 
 50    0.0700       0.00         259   b2b3 a7a6 
 40    0.0800       0.00         162   b1a3 a7a6 
 30    0.0900       0.00          88   c2c3 
 20    0.0900       0.01          49   a2a4 
 10    0.0900       0.04          45   a2a3 

[Henk]

Code: Select all

Depth  Value   Time(seconds)   Nodes
 10    0.0200      90.13     4776753   d2d4 d7d5 e2e3 e7e6 a2a3 a7a6 c2c4 g8h6 g1h3 f8d6 
  9    0.1300      47.69     2444762   e2e4 d7d5 e4d5 d8d5 d2d4 e7e5 g1f3 d5a5 c2c3 
  8    0.0200      11.20      553280   d2d4 d7d5 e2e3 e7e6 a2a3 a7a6 c2c4 f8d6 
  7    0.1100       4.21      230557   e2e4 e7e6 d2d4 d7d5 e4e5 a7a6 a2a3 
  6    0.0100       0.56       32834   e2e4 e7e6 d2d4 d7d5 
  5    0.1000       0.20       11387   d2d4 d7d5 e2e3 e7e6 a2a3 
  4    0.0000       0.10        4962   d2d4 d7d5 e2e3 e7e6 
  3    0.2200       0.03        1309   d2d4 d7d5 e2e3 
  2    0.0000       0.02         521   e2e3 e7e6 
  1    0.3900       0.04          51   e2e3 

[Henk]

Fine positional play: Nc3 Nb1 c3

Code: Select all

Depth  Value   Time(seconds)   Nodes
 18    0.0000      23.05     7795318   b1a3 a7a6 g1h3 b7b6 b2b3 g7g6 c2c3 c7c6 g2g3 g8h6 f1g2 b6b5 c1b2 f8g7 e1g1 e8g8 e2e3 e7e6 
 17    0.0000      75.51    31265394   g1h3 b7b6 b1a3 g8h6 b2b3 a7a6 c1b2 c7c6 g2g3 a6a5 d1b1 h6g4 a3c4 c8b7 b1c1 b6b5 c4a3 
 16    0.0000       0.93      355529   b1c3 c7c6 c3b1 a7a6 c2c3 a6a5 a2a4 g8h6 b2b3 b7b6 d1c2 g7g6 g2g3 c8b7 c1b2 b6b5 
 15    0.0000       2.28     1035368   b1c3 c7c6 c3b1 a7a6 c2c3 a6a5 a2a4 g8h6 b2b3 b7b6 d1c2 g7g6 g2g3 c8b7 c1b2 
 14    0.0000       0.03       19766   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 a6b7 
 13    0.0000       0.05       22008   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 
 12    0.0000       0.03       13809   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 g1f3 b7b6 
 11    0.0000       0.03       12541   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 g1f3 
 10    0.0000       0.01        6443   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 
  9    0.0000       0.02        3712   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 
  8    0.0000       0.01        2337   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 
  7    0.0000       0.00         620   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 
  6    0.0000       0.00         567   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 
  5    0.0000       0.00         539   b1a3 c7c6 c2c3 g7g6 g2g3 
  4    0.0000       0.00         355   c2c3 c7c6 g2g3 g7g6 
  3    0.1200       0.01         296   c2c3 c7c6 g2g3 
  2    0.0000       0.00         244   c2c3 c7c6 
  1    0.1200       0.04          43   c2c3 

[Henk]

Code: Select all

Depth  Value   Time(seconds)   Nodes
 28    0.0000       0.53      218101   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 f8h6 g1f3 g8f6 a1b1 b7b6 e1g1 e8g8 c3c4 h6g7 e2e3 e7e6 f3g5 a5a4 b1a1 f6g4 g5f3 c6c5 a1b1 g4f6 
 27    0.0000       0.29      154916   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 f8h6 g1f3 g8f6 a1b1 b7b6 e1g1 e8g8 c3c4 h6g7 e2e3 e7e6 f3g5 a5a4 b1a1 f6g4 g5f3 c6c5 a1b1 
 26    0.0000      50.70    20874111   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 f8h6 g1f3 g8f6 a1b1 b7b6 e1g1 e8g8 c3c4 h6g7 e2e3 e7e6 f3g5 a5a4 b1a1 f6g4 g5f3 c6c5 
 25    0.0000       0.09       60718   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 f8g7 b2c1 h6h5 c1b2 g7f6 b2c1 f6g7 c1b2 g7f6 b2c1 f6g7 
 24    0.0000       0.50      302009   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 f8g7 b2c1 h6h5 c1b2 g7f6 b2c1 f6g7 c1b2 g7f6 b2c1 
 23    0.0000       0.09       32054   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 c7d6 b2c1 d6c5 c1b2 
 22    0.0000       0.09       29663   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 c7d6 b2c1 a6b7 
 21    0.0000       0.06       21695   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 c7d6 b2c1 
 20    0.0000       0.04       15295   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 a6b7 
 19    0.0000       0.03       19461   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 
 18    0.0000       0.02       11379   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 a6b7 
 17    0.0000       0.03       16312   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 
 16    0.0000       0.01        7267   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 a6b7 
 15    0.0000       0.01        5126   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 
 14    0.0000       0.01        3206   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 a6b7 
 13    0.0000       0.02        3666   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 
 12    0.0000       0.00        1073   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 g1f3 b7b6 
 11    0.0000       0.00         762   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 g1f3 
 10    0.0000       0.00         588   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 
  9    0.0000       0.00         453   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 
  8    0.0000       0.00         421   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 
  7    0.0000       0.00         466   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 
  6    0.0000       0.00         627   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 
  5    0.0000       0.00         539   b1a3 c7c6 c2c3 g7g6 g2g3 
  4    0.0000       0.00        1427   c2c3 c7c6 g2g3 g7g6 
  3    0.1200       0.01         296   c2c3 c7c6 g2g3 
  2    0.0000       0.00         244   c2c3 c7c6 
  1    0.1200       0.04          43   c2c3 

[Daniel Anulliero]

Code: Select all

Depth  Value   Time(seconds)   Nodes
 28    0.0000       0.53      218101   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 f8h6 g1f3 g8f6 a1b1 b7b6 e1g1 e8g8 c3c4 h6g7 e2e3 e7e6 f3g5 a5a4 b1a1 f6g4 g5f3 c6c5 a1b1 g4f6 
 27    0.0000       0.29      154916   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 f8h6 g1f3 g8f6 a1b1 b7b6 e1g1 e8g8 c3c4 h6g7 e2e3 e7e6 f3g5 a5a4 b1a1 f6g4 g5f3 c6c5 a1b1 
 26    0.0000      50.70    20874111   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 f8h6 g1f3 g8f6 a1b1 b7b6 e1g1 e8g8 c3c4 h6g7 e2e3 e7e6 f3g5 a5a4 b1a1 f6g4 g5f3 c6c5 
 25    0.0000       0.09       60718   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 f8g7 b2c1 h6h5 c1b2 g7f6 b2c1 f6g7 c1b2 g7f6 b2c1 f6g7 
 24    0.0000       0.50      302009   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 f8g7 b2c1 h6h5 c1b2 g7f6 b2c1 f6g7 c1b2 g7f6 b2c1 
 23    0.0000       0.09       32054   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 c7d6 b2c1 d6c5 c1b2 
 22    0.0000       0.09       29663   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 c7d6 b2c1 a6b7 
 21    0.0000       0.06       21695   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 c7d6 b2c1 
 20    0.0000       0.04       15295   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 a6b7 
 19    0.0000       0.03       19461   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 d8c7 c1b2 
 18    0.0000       0.02       11379   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 a6b7 
 17    0.0000       0.03       16312   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 h6h5 b2c1 
 16    0.0000       0.01        7267   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 a6b7 
 15    0.0000       0.01        5126   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 h7h6 c1b2 
 14    0.0000       0.01        3206   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 a6b7 
 13    0.0000       0.02        3666   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 b7b6 g1f3 c8a6 b2b3 
 12    0.0000       0.00        1073   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 g1f3 b7b6 
 11    0.0000       0.00         762   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 g1f3 
 10    0.0000       0.00         588   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 a5a4 
  9    0.0000       0.00         453   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 f1g2 
  8    0.0000       0.00         421   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 a6a5 
  7    0.0000       0.00         466   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 d1c2 
  6    0.0000       0.00         627   b1a3 c7c6 c2c3 g7g6 g2g3 a7a6 
  5    0.0000       0.00         539   b1a3 c7c6 c2c3 g7g6 g2g3 
  4    0.0000       0.00        1427   c2c3 c7c6 g2g3 g7g6 
  3    0.1200       0.01         296   c2c3 c7c6 g2g3 
  2    0.0000       0.00         244   c2c3 c7c6 
  1    0.1200       0.04          43   c2c3 

Na3 the best move ? WTF ?
Lol let's try to add some center knowledges in poor skipper!