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Subject: Re: Junior 6 has an enormous bug, you are right

Author: jonas cohonas

Date: 10:43:30 03/17/01

Go up one level in this thread


On March 17, 2001 at 13:04:29, Antonio Senatore wrote:

>It seems incredible that a top chess program like Junior 6 (without the KPPKB
>tablebase but with the KBK and the KBKP tables) CAN'T SEE MATE IN ONE in the
>next position:
>
>7k/4pK1p/7B/8/8/8/8/8 w - -
>
>Junior neither can see mate in one in the following positions (without KNNKP
>tablebase):
>
>8/8/8/8/6N1/5NK1/7p/7k w - -
>
>8/8/8/8/8/6NK/3N1p2/6k1 w - -
>
>
>In the next position, he can't see mate in two:
>
>7k/3N4/6KN/8/8/8/7p/8 w - -
>
>Let's hope in the next update this problem is resolved.
>
>Regards.
>
>Antonio

New position
7k/4pK1p/7B/8/8/8/8/8 w - - 0 1

Analysis by Junior 6.0:

1.Bf8 e5
  =  (-0.07)   Depth: 3   00:00:00
1.Bg7#
  +-  (#1)   Depth: 3   00:00:00
1.Bg7#
  +-  (#1)   Depth: 3   00:00:00

(, MyTown 18.03.2001)

New position
8/8/8/8/6N1/5NK1/7p/7k w - - 0 1

Analysis by Junior 6.0:

1.Ngxh2
  =  (0.00)   Depth: 3   00:00:00
1.Ngxh2
  =  (0.00)   Depth: 6   00:00:00, tb=1
1.Ngxh2
  =  (0.00)   Depth: 9   00:00:00, tb=3
1.Ngxh2
  =  (0.00)   Depth: 12   00:00:00, tb=5
1.Ngxh2
  =  (0.00)   Depth: 15   00:00:00, tb=7
1.Ngxh2
  =  (0.00)   Depth: 18   00:00:00, tb=9
1.Ngxh2
  =  (0.00)   Depth: 21   00:00:00, tb=11
1.Ngxh2
  =  (0.00)   Depth: 24   00:00:00  1kN, tb=13
1.Ngxh2
  =  (0.00)   Depth: 27   00:00:00  1kN, tb=15
1.Ngxh2
  =  (0.00)   Depth: 30   00:00:00  1kN, tb=17
1.Ngxh2
  =  (0.00)   Depth: 33   00:00:00  1kN, tb=19
1.Ngxh2
  =  (0.00)   Depth: 36   00:00:00  2kN, tb=21
1.Ngxh2
  =  (0.00)   Depth: 39   00:00:00  2kN, tb=23
1.Ngxh2
  =  (0.00)   Depth: 42   00:00:00  2kN, tb=25
1.Ngxh2
  =  (0.00)   Depth: 45   00:00:00  3kN, tb=27
1.Ngxh2
  =  (0.00)   Depth: 48   00:00:00  3kN, tb=29
1.Ngxh2
  =  (0.00)   Depth: 51   00:00:00  3kN, tb=31
1.Ngxh2
  =  (0.00)   Depth: 54   00:00:00  4kN, tb=33
1.Ngxh2
  =  (0.00)   Depth: 57   00:00:00  4kN, tb=35
1.Ngxh2
  =  (0.00)   Depth: 60   00:00:00  5kN, tb=37
1.Ngxh2
  =  (0.00)   Depth: 63   00:00:00  5kN, tb=39
1.Ngxh2
  =  (0.00)   Depth: 63   00:00:00  5kN, tb=40

(, MyTown 18.03.2001)

New position
8/8/8/8/8/6NK/3N1p2/6k1 w - - 0 1

Analysis by Junior 6.0:

1.Nh1
  =  (0.00)   Depth: 3   00:00:00
1.Nh1
  =  (0.00)   Depth: 6   00:00:00
1.Nh1
  =  (0.00)   Depth: 9   00:00:00, tb=5
1.Nh1
  =  (0.00)   Depth: 12   00:00:00, tb=18
1.Nh1
  =  (0.00)   Depth: 15   00:00:00  1kN, tb=32
1.Nh1
  =  (0.00)   Depth: 18   00:00:00  1kN, tb=46
1.Nh1
  =  (0.00)   Depth: 21   00:00:00  2kN, tb=60
1.Nh1
  =  (0.00)   Depth: 24   00:00:00  2kN, tb=74
1.Nh1
  =  (0.00)   Depth: 27   00:00:00  3kN, tb=88
1.Nh1
  =  (0.00)   Depth: 30   00:00:00  3kN, tb=102
1.Nh1
  =  (0.00)   Depth: 33   00:00:00  4kN, tb=116
1.Nh1
  =  (0.00)   Depth: 36   00:00:00  4kN, tb=130
1.Nh1
  =  (0.00)   Depth: 39   00:00:00  5kN, tb=144
1.Nh1
  =  (0.00)   Depth: 42   00:00:00  5kN, tb=158
1.Nh1
  =  (0.00)   Depth: 45   00:00:00  6kN, tb=172
1.Nh1
  =  (0.00)   Depth: 48   00:00:00  7kN, tb=186
1.Nh1
  =  (0.00)   Depth: 51   00:00:00  7kN, tb=200
1.Nh1
  =  (0.00)   Depth: 54   00:00:00  8kN, tb=214
1.Nh1
  =  (0.00)   Depth: 57   00:00:00  9kN, tb=228
1.Nh1
  =  (0.00)   Depth: 60   00:00:00  9kN, tb=242
1.Nh1
  =  (0.00)   Depth: 63   00:00:00  10kN, tb=256
1.Nh1
  =  (0.00)   Depth: 63   00:00:00  10kN, tb=256

(, MyTown 18.03.2001)

New position
7k/3N4/6KN/8/8/8/7p/8 w - - 0 1

Analysis by Junior 6.0:

1.Ne5 h1Q
  ³  (-0.70)   Depth: 3   00:00:00
1.Nf7+
  =  (0.00)   Depth: 3   00:00:00
1.Nf7+
  =  (0.00)   Depth: 6   00:00:00
1.Nf7+
  =  (0.00)   Depth: 9   00:00:00
1.Nf7+
  =  (0.00)   Depth: 12   00:00:00
1.Nf7+
  =  (0.00)   Depth: 15   00:00:00
1.Nf7+
  =  (0.00)   Depth: 18   00:00:00  1kN
1.Nf7+
  =  (0.00)   Depth: 21   00:00:00  1kN
1.Nf7+
  =  (0.00)   Depth: 24   00:00:00  2kN
1.Nf7+
  =  (0.00)   Depth: 27   00:00:00  3kN
1.Nf7+
  =  (0.00)   Depth: 30   00:00:00  3kN
1.Nf7+
  =  (0.00)   Depth: 33   00:00:03  5221kN, tb=8986

(, MyTown 18.03.2001)

You are right that is unacceptable from a top program, it seems in general that
the chessbase products have a problem reading tb's or maby the tb's are not as
perfect as one would think.


Regards
Jonas



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