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Subject: Re: Endgame test position

Author: Dann Corbit

Date: 09:52:26 05/15/02

Go up one level in this thread


On May 15, 2002 at 07:46:27, Andrew Williams wrote:

>How long does it take your program to see Rxe7! here?
>
>[D]4r1k1/2R1N1b1/8/p7/1p6/6PK/7P/8 b - - bm Rxe7

Amy has a tough time:

White(1): level 1/10
Timecontrol is 1 moves in 10 mins
White(1): test rxe7.epd
Problem 1:
best move is Rxe7
        +---+---+---+---+---+---+---+---+
      8 |   |   |   |   |*R*|   |*K*|   |
        +---+---+---+---+---+---+---+---+
      7 |   |   | R |   | N |   |*B*|   |   Hashkey: 41c2286b
        +---+---+---+---+---+---+---+---+
      6 |   |   |   |   |   |   |   |   |
        +---+---+---+---+---+---+---+---+
      5 |*P*|   |   |   |   |   |   |   |   Black (10000,  8000)  P.BR.
        +---+---+---+---+---+---+---+---+
      4 |   |*P*|   |   |   |   |   |   |   White (10000,  8000)  PN.R.
        +---+---+---+---+---+---+---+---+
      3 |   |   |   |   |   |   | P | K |
        +---+---+---+---+---+---+---+---+
      2 |   |   |   |   |   |   |   | P |   Index: 47
        +---+---+---+---+---+---+---+---+
      1 |   |   |   |   |   |   |   |   |   MateThreat: 0 0
        +---+---+---+---+---+---+---+---+
          a   b   c   d   e   f   g   h
TC: 1 moves in 600 secs
TL: 200/300
GamePhase: Middlegame
It    Time   Score  principal Variation
11     1.4  +0.000  1. .. Kf8 2. Ng6+ Kg8 3. Ne7+
11     3.1     +++  1. .. Kh8
11     8.4  +0.048  1. .. Kh8 2. Rb7 a4 3. Ng6+ Kh7 4. Ne7 b3 5. Nf5 Rg8 6.
                    Kg2 Kh8 7. Kf3
11     8.4  +0.048  1. .. Kh8 2. Rb7 a4 3. Ng6+ Kh7 4. Ne7 b3 5. Nf5 Rg8 6.
                    Kg2 Kh8 7. Kf3
12    15.0  -0.144  1. .. Kh8 2. Rb7 Ra8 3. Rb5 Ra6 4. Kg4 Bf6 5. Rb7 Re6 6.
                    Ng6+ Kg8 7. Kf5 Rd6
12    16.3     +++  1. .. Kf8
12    31.6  +0.000  1. .. Kf8 2. Ng6+ Kg8 3. Ne7+ Kf8 4. Ng6+ Kg8 5. Ne7+ Kf8
                    6. Ng6+ Kg8 7. Ne7+
12    32.4  +0.000  1. .. Kf8 2. Ng6+ Kg8 3. Ne7+ Kf8 4. Ng6+ Kg8 5. Ne7+ Kf8
                    6. Ng6+ Kg8 7. Ne7+
13    35.8  +0.000  1. .. Kf8 2. Ng6+ Kg8 3. Ne7+ Kf8 4. Ng6+ Kg8 5. Ne7+ Kf8
                    6. Ng6+ Kg8 7. Ne7+
13    43.4  +0.000  1. .. Kf8 2. Ng6+ Kg8 3. Ne7+ Kf8 4. Ng6+ Kg8 5. Ne7+ Kf8
                    6. Ng6+ Kg8 7. Ne7+
14    51.0  +0.000  1. .. Kf8 2. Ng6+ Kg8 3. Ne7+ Kf8 4. Ng6+ Kg8 5. Ne7+ Kf8
                    6. Ng6+ Kg8 7. Ne7+
14    1:49     +++  1. .. Kh8
14    2:43  +0.976  1. .. Kh8 2. Rb7 a4 3. Nf5 Bc3 4. Kg4 b3 5. Nd6 Re1 6.
                    Nb5 Be5 7. Kf5 b2 8. Na3
14    2:43  +0.976  1. .. Kh8 2. Rb7 a4 3. Nf5 Bc3 4. Kg4 b3 5. Nd6 Re1 6.
                    Nb5 Be5 7. Kf5 b2 8. Na3
15    4:10  +0.992  1. .. Kh8 2. Rb7 a4 3. Nf5 Bc3 4. Nh6 Re2 5. g4 a3 6. g5
                    Bg7 7. Nf7+ Kh7 8. Rb6 Re3+ 9. Kg4 a2 10. g6+
Nodes = 74882528, QPerc: 60 %, time = 250.49 secs, 298.9 kN/s
Extensions: Check: 4463340  DblChk: 12813  DiscChk: 159514  SingReply: 205194
            Recapture: 95621   Passed Pawn: 1821409   Zugzwang: 15
Hashing: Trans: 3673498/29244986 = 12 %   Pawn: 25294939/25296904 = -69 %
         Eval: 20310482/45607386 = 44 %
EGTB Hits/Probes = 4533/5892
Hashtable 1:  entries = 8388608, use = 4085188
not solved!
solved 0 out of 1  (BT2630 = 1730, LCT2 = 1900, BS2830 = 2830)
-----------------------------------------------



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