Fizbo

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Fizbo 2.0 (21.12.2017)

Changes in version 2, released December 21, 2017
1. minor bug fixes: fixed a bug that occasionally crashed the engine, mostly running on multiple CPU cores
2. minor changes to search and evaluation.
3. changes to parallel search, improving performance mostly on >4 CPU cores.
Expected playing strength is approximately 20-30 ELO higher than Fizbo 1.9

Estimated strength with 1 CPU/4 CPU is 3,200/3,280 ELO respectively (#6 on CCRL 40/40 list).

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Add Fizbo 2
2500k@4.5/60+0.3/128Mb/HS440.pgn

   # PLAYER                  :  RATING  ERROR  POINTS  PLAYED   (%)  CFS(%)     W     D     L  D(%)  OppAvg
   1 Stockfish_010118_c15    :    3400      7  3072.0    4400  69.8     100  2056  2032   312  46.2    3242
   2 Houdini_6.02            :    3382      6  2960.0    4400  67.3     100  1924  2072   404  47.1    3246
   3 Komodo_11.2.2           :    3334      6  2648.5    4400  60.2     100  1549  2199   652  50.0    3255
   4 Fire_6.1                :    3182      6  1620.5    4400  36.8     100   623  1995  1782  45.3    3286
   5 Fizbo_2                 :    3161      7  1480.5    4400  33.6      97   623  1715  2062  39.0    3290
   6 Shredder_13             :    3151      6  1418.5    4400  32.2     ---   474  1889  2037  42.9    3292

White advantage = 31.80 +/- 2.25
Draw rate (equal opponents) = 55.91 % +/- 0.54

5) Fizbo_2              3161 :   4400 (+623,=1715,-2062),  33.6 %

   vs.                        :  games (   +,    =,    -),   (%) :   Diff,   SD, CFS (%)
   Stockfish_010118_c15       :    880 (  38,  316,  526),  22.3 :   -239,    5,    0.0
   Houdini_6.02               :    880 (  52,  309,  519),  23.5 :   -221,    5,    0.0
   Komodo_11.2.2              :    880 (  74,  344,  462),  28.0 :   -174,    5,    0.0
   Fire_6.1                   :    880 ( 182,  390,  308),  42.8 :    -22,    5,    0.0
   Shredder_13                :    880 ( 277,  356,  247),  51.7 :    +10,    5,   97.5