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Subject: Crafty 8.11 (circa 1995) vs Crafty 19.19 (2005)

Author: Mike Byrne

Date: 02:29:57 02/26/05


[d]R5Nk/7p/4pbpP/n1p4n/2p1b3/K1p3pq/8/8 w - - 0 1

Crafty 18.11 on an Opteron (DOS bootup disk)

White(1): move  ->  now the command is go
middle-game phase
clearing transposition table
clearing pawn hash tables
              time surplus   0.0s  time limit  10:00
              depth   time   value    variation (1)
                3     1.0s      ++    Re8
                3     1.0s -18.724    Re8 Bc6 Nxf6+ Bxe8 Nxe8 ...
                3     1.0s      ++    Rf8
                3     1.0s      ++    Rf8
                3     1.0s -17.692    Rf8 Bg7 hxg7+ Kxg7 Re8
                3->   1.0s -17.692    Rf8 Bg7 hxg7+ Kxg7 Re8
                4     1.0s -17.896    Rf8 Bg7 hxg7+ Kxg7 Re8 Nb3
                4->   1.0s -17.896    Rf8 Bg7 hxg7+ Kxg7 Re8 Nb3
                5     1.0s      ++    Rf8
                5     1.0s -17.088    Rf8 Bg7 Rc8 Bb7 hxg7+ Nxg7 Rxc5 Kxg8
                                      Rxa5
                5->   1.0s -17.088    Rf8 Bg7 Rc8 Bb7 hxg7+ Nxg7 Rxc5 Kxg8
                                      Rxa5
                6     1.0s -17.276    Rf8 Bg7 Rc8 Bb7 hxg7+ Nxg7 Rxc5 h5
                6->   1.0s -17.276    Rf8 Bg7 Rc8 Bb7 hxg7+ Nxg7 Rxc5 h5
                7     1.0s      --    Rf8
                7     2.0s -17.776    Rf8 Bg7 Rc8 Bxh6 Nxh6+ Kg7 Rxc5 g2
                                      Nf5+ gxf5 Rxa5
                7     2.0s      ++    Re8
                7     2.0s -17.694    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Bb7
                                      hxg7+ ...
                7->   2.0s -17.694    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Bb7
                                      hxg7+ ...
                8     2.0s -17.694    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Nb3
                                      ...
                8->   2.0s -17.694    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Nb3
                                      ...
                9     2.0s -17.694    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Bxh6
                                      Nxh6+ Kg7
                9->   3.0s -17.694    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Bxh6
                                      Nxh6+ Kg7
               10     3.0s -17.696    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Bxh6
                                      Ne7+ Kg7 Nxc6 Nxc6 Rxc6
               10->   4.0s -17.696    Re8 Bc6 Rb8 Be5 Rf8 Bg7 Rc8 Bxh6
                                      Ne7+ Kg7 Nxc6 Nxc6 Rxc6
               11     6.0s -17.660    Re8 Bc6 Rb8 Be5 Rd8 Nb7 Rf8 Bg7
                                      Rc8 Bxh6 ...
               11     9.0s      ++    Rb8
               11     9.0s      ++    Rb8
               11    12.0s   Mat06    Rb8 Be5 Rc8 Bb7 Rd8 Nc6 Re8 Bg7
                                      Nf6+ Bf8 Rxf8+
               11->  12.0s   Mat06    Rb8 Be5 Rc8 Bb7 Rd8 Nc6 Re8 Bg7
                                      Nf6+ Bf8 Rxf8+
              time: 12.0s  cpu:97%  mat:-16  n:4521745/2653471  maxd:30
nps:386473
              ext-> checks:309281 recaps:6488 pawns:74612
              hashing-> trans/ref:12%  pawn:99%  king:0%  evals:1%
              hashing-> value:0%  bound:3%  cutoff:7%  used:w99% b99%
              nulls used[287897/1874400] wasted[256486/1772751]

Crafty will mate in 6 moves.


White(1): Rb8
              time used:  13.0s


===========================================

Crafty vSE/64 19.19 (2 cpus)

White(1): mt 1
max threads set to 1
White(1): st 60
search time set to 60.00.
White(1): R5Nk/7p/4pbpP/n1p4n/2p1b3/K1p3pq/8/8 w - - 0 1

       +---+---+---+---+---+---+---+---+
    8  |-R-| . |   | . |   | . |-N-|<K>|
       +---+---+---+---+---+---+---+---+
    7  | . |   | . |   | . |   | . |<P>|
       +---+---+---+---+---+---+---+---+
    6  |   | . |   | . |<P>|<B>|<P>|-P-|
       +---+---+---+---+---+---+---+---+
    5  |<N>|   |<P>|   | . |   | . |<N>|
       +---+---+---+---+---+---+---+---+
    4  |   | . |<P>| . |<B>| . |   | . |
       +---+---+---+---+---+---+---+---+
    3  |-K-|   |<P>|   | . |   |<P>|<Q>|
       +---+---+---+---+---+---+---+---+
    2  |   | . |   | . |   | . |   | . |
       +---+---+---+---+---+---+---+---+
    1  | . |   | . |   | . |   | . |   |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

White(1): g
              clearing hash tables
              time surplus   0.00  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                8     0.08 -18.63   1. Rf8 Bg7 2. Rd8 Nb7 3. Rc8 Nd6 4.
                                    hxg7+ Kxg7 5. Rd8
                8     0.17 -18.26   1. Rb8 Be5 2. Re8 Bc6 3. Rf8 Bg7 4.
                                    Rd8 Bxh6 5. Nxh6+ Kg7 6. Ng8
                8->   0.17 -18.26   1. Rb8 Be5 2. Re8 Bc6 3. Rf8 Bg7 4.
                                    Rd8 Bxh6 5. Nxh6+ Kg7 6. Ng8
                9     0.34 -18.26   1. Rb8 Be5 2. Re8 Bc6 3. Rf8 Bg7 4.
                                    Rd8 Bxh6 5. Nxh6+ Kg7 6. Ng8
                9->   0.36 -18.26   1. Rb8 Be5 2. Re8 Bc6 3. Rf8 Bg7 4.
                                    Rd8 Bxh6 5. Nxh6+ Kg7 6. Ng8
               10     1.15     +1   1. Rb8!!
               10     1.17 -17.99   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Rf8 Bg7 5. Re8 Bxh6 6. Nxh6+ Kg7 7.
                                    Ng8
               10->   1.34 -17.99   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Rf8 Bg7 5. Re8 Bxh6 6. Nxh6+ Kg7 7.
                                    Ng8
               11     3.37 -18.10   1. Rb8 Be5 2. Rc8 Bb7 3. Re8 Bc6 4.
                                    Rd8 Nb7 5. Rf8 Bg7 6. Rc8 Bd7 7. Rb8
                                    Na5 <HT>
               11->   3.58 -18.10   1. Rb8 Be5 2. Rc8 Bb7 3. Re8 Bc6 4.
                                    Rd8 Nb7 5. Rf8 Bg7 6. Rc8 Bd7 7. Rb8
                                    Na5 <HT>
               12    11.47     +1   1. Rb8!!
               12    12.89     +3   1. Rb8!!
               12    13.72     +M   1. Rb8!!
               12    13.76  Mat06   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Re8 Ng7 5. Rf8 Nd8 6. Ne7#
               12->  13.78  Mat06   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Re8 Ng7 5. Rf8 Nd8 6. Ne7#
              time=13.78  cpu=99%  mat=-19  n=28851175  fh=90%  nps=2.09M
              ext-> chk=2089406 cap=14776 pp=1361114 1rep=170653 mate=7412
              predicted=0  nodes=28851175  evals=12238511  50move=0
              endgame tablebase-> probes=0  hits=0
              SMP->  split=0  stop=0  data=0/64  cpu=13.73  elap=13.78

mate in 6 moves.

slower!  - I suspected node move

so....


White(1): sel 0 0
null move disabled.


Black(1): R5Nk/7p/4pbpP/n1p4n/2p1b3/K1p3pq/8/8 w - - 0 1

       +---+---+---+---+---+---+---+---+
    8  |-R-| . |   | . |   | . |-N-|<K>|
       +---+---+---+---+---+---+---+---+
    7  | . |   | . |   | . |   | . |<P>|
       +---+---+---+---+---+---+---+---+
    6  |   | . |   | . |<P>|<B>|<P>|-P-|
       +---+---+---+---+---+---+---+---+
    5  |<N>|   |<P>|   | . |   | . |<N>|
       +---+---+---+---+---+---+---+---+
    4  |   | . |<P>| . |<B>| . |   | . |
       +---+---+---+---+---+---+---+---+
    3  |-K-|   |<P>|   | . |   |<P>|<Q>|
       +---+---+---+---+---+---+---+---+
    2  |   | . |   | . |   | . |   | . |
       +---+---+---+---+---+---+---+---+
    1  | . |   | . |   | . |   | . |   |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

White(1): g
              time surplus  29.94  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                8     0.05 -18.44   1. Rf8 Bg7 2. Rb8 Bxh6 3. Nf6+ Bf8
                                    4. Nxe4 c2 5. Kb2 Qf5
                8     0.07 -18.09   1. Rb8 Be5 2. Rc8 Bb7 3. Rf8 Bg7 4.
                                    hxg7+ Kxg7 5. Re8
                8->   0.07 -18.09   1. Rb8 Be5 2. Rc8 Bb7 3. Rf8 Bg7 4.
                                    hxg7+ Kxg7 5. Re8
                9     0.10 -18.09   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Rf8 Bg7 5. hxg7+ Kxg7
                9->   0.14 -18.09   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Rf8 Bg7 5. hxg7+ Kxg7
               10     0.24 -17.99   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Rf8 Bg7 5. hxg7+ Kxg7 6. Re8
               10->   0.33 -17.99   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Rf8 Bg7 5. hxg7+ Kxg7 6. Re8
               11     0.58     +1   1. Rb8!!
               11     0.82     +3   1. Rb8!!
               11     0.96     +M   1. Rb8!!
               11     1.42  Mat06   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Re8 Ng7 5. Rf8 g2 6. Ne7#
               11->   1.74  Mat06   1. Rb8 Be5 2. Rc8 Bb7 3. Rd8 Nc6 4.
                                    Re8 Ng7 5. Rf8 g2 6. Ne7#
              time=1.74  cpu=100%  mat=-19  n=4322538  fh=96%  nps=2.48M
              ext-> chk=269263 cap=3222 pp=258583 1rep=30650 mate=0
              predicted=1  nodes=4322538  evals=242457  50move=0
              endgame tablebase-> probes=0  hits=0
              SMP->  split=0  stop=0  data=0/64  cpu=1.74  elap=1.74

mate in 6 moves.






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