old test position

kgburcham · Post by **kgburcham** » Wed Sep 28, 2011 4:06 am

Rxh7

[D] r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w Q -

Jouni · Post by **Jouni** » Wed Sep 28, 2011 8:40 am

Critter (who else

) with 2 CPU:

Analysis by Critter 1.2 64-bit:

1.Be2 d4 2.Nxc4 b5 3.Nd6 Bxd6 4.exd6 dxe3 5.Kf1 Re8 6.Qd3 Be4 7.Qd4 Bf5 8.Rh4 Re4 9.Qd5 Re6 10.Rd1 Rc8 11.d7 Rc2 12.Qxb5 Rb6 13.Qe5 Bxd7 14.b3 Re6 15.Qd4 Re7 16.Qxa7 Qc8 17.Qa3 Qe8 18.b4
= (-0.25 ++) Depth: 18/44 00:00:44 80870kN
1.Be2 d4 2.Nxc4 b5 3.Nd6 Bxd6 4.exd6 dxe3 5.Kf1 Re8 6.Qd3 Be4 7.Qd4 Bf5 8.Rh4 Re4 9.Qd5 Re6 10.Rd1 Rb8 11.Qd4 Qd7 12.Kg1 Rb6 13.Qc5 Rbxd6 14.Rxd6 Qxd6 15.Qxa7
=/+ (-0.28) Depth: 18/44 00:00:45 82715kN
1.Rxh7 cxd3 2.Kf2 Kxh7 3.Qh1+ Kg8 4.Qh6 Bxg5 5.fxg5 d4 6.Rh1 dxe3+ 7.Kxe3 Bf3 8.gxf3
= (-0.19 ++) Depth: 19/47 00:03:46 477mN
1.Rxh7 cxd3 2.Kf2 Kxh7 3.Qh1+ Kg8 4.Qh6 Bxg5 5.fxg5 d4 6.Rh1 dxe3+ 7.Kxe3 Bf3 8.gxf3
= (-0.11 ++) Depth: 19/47 00:04:38 612mN
1.Rxh7 cxd3 2.Kf2 Kxh7 3.Qh1+ Kg8 4.Qh6 Bxg5 5.fxg5 d4 6.Rh1 dxe3+ 7.Kxe3 Bf3 8.gxf3
= (0.01 ++) Depth: 19/47 00:05:29 746mN
1.Rxh7 cxd3 2.Kf2 Kxh7 3.Qh1+ Kg8 4.Qh6 Bxg5 5.fxg5 d4 6.Rh1 dxe3+ 7.Kxe3 Bf3 8.gxf3
= (0.20 ++) Depth: 19/47 00:06:22 884mN

But seems, that Kf2 is also winning with different move order.

Jouni

Robert Flesher · Post by **Robert Flesher** » Wed Sep 28, 2011 1:13 pm

New game
r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w Q - 0 1

Analysis by Zappa Mexico II: Dissident Aggressor

1.Bxg6 fxg6 2.Nf3 d4 3.Qxd4 Qxd4 4.Nxd4 Bxg2
-+ (-1.89) Depth: 9/33 00:00:01 897kN
1.Qg4 Bb4 2.Bc2 c3 3.bxc3 Bxc3 4.Qh3 Bxd2+ 5.Kxd2
=/+ (-0.64) Depth: 9/33 00:00:01 1579kN
1.Qg4 Bb4 2.Bc2 c3 3.bxc3 Bxc3 4.Qh3 Bxd2+ 5.Kxd2
=/+ (-0.64) Depth: 9/33 00:00:01 1722kN
1.Qg4 Qc8 2.Qxc8 Raxc8 3.Be2 Bb4 4.a3 Ba5
=/+ (-0.31) Depth: 10/33 00:00:01 2156kN
1.Qg4 Qc8 2.Qxc8 Raxc8 3.Be2 Bb4 4.a3
=/+ (-0.31) Depth: 10/33 00:00:01 2238kN
1.Qg4 cxd3 2.Qh3 h5 3.gxh6 Kh8 4.a3 d4 5.e4 Qc8 6.Qxc8 Raxc8
-+ (-1.76) Depth: 11/33 00:00:01 3084kN
1.Be2 Bc5 2.Kf2 d4 3.Nxc4 Qd5 4.Qg1 dxe3+
-+ (-1.46) Depth: 11/33 00:00:02 6048kN
1.Bf1 d4 2.Nxc4 b5 3.Qxd4 bxc4 4.0-0-0 Qxd4 5.exd4
-/+ (-1.09) Depth: 11/36 00:00:03 9618kN
1.Bf1 d4 2.Nxc4 b5 3.Qxd4 bxc4 4.0-0-0 Qxd4 5.exd4
-/+ (-1.09) Depth: 11/36 00:00:03 10091kN
1.Bf1 d4 2.Nxc4 b5 3.Qxd4 bxc4 4.Qxd8 Raxd8 5.Rd1 Bb4+
-+ (-1.47) Depth: 12/37 00:00:04 11447kN
1.Be2 Bc5 2.Kf2 d4 3.Nxc4 Qd5 4.Qg1 dxe3+ 5.Kf1 Qe4
-+ (-1.46) Depth: 12/37 00:00:05 13689kN
1.Be2 Bc5 2.Kf2 d4 3.Nxc4 Qd5 4.Qg1 dxe3+ 5.Kf1 Qe4
-+ (-1.46) Depth: 12/41 00:00:06 18700kN
1.Be2 Bc5 2.Kf2 d4 3.Nxc4 Qd5 4.Qg1 dxe3+ 5.Kf1 Ba6 6.Rc1 Bxc4 7.Rxc4
-/+ (-1.37) Depth: 13/41 00:00:08 23512kN
1.Be2 Bc5 2.Kf2 d4 3.Nxc4 Qd5 4.Qg1 dxe3+ 5.Kf1 Ba6 6.Rc1 Bxc4 7.Rxc4
-/+ (-1.37) Depth: 13/41 00:00:10 29529kN
1.Be2 Rc8 2.Nf3 c3 3.bxc3 Rxc3 4.Kf2 Bc5 5.Nd4 Bc8 6.Qd2 Bxd4 7.exd4
-/+ (-1.09) Depth: 14/45 00:00:19 62290kN
1.Be2 Rc8 2.Nf3 c3 3.bxc3 Rxc3 4.Kf2 Bc5 5.Nd4 Bc8 6.Qd2 Bxd4 7.exd4
-/+ (-1.09) Depth: 14/47 00:00:23 73707kN
1.Be2 Rc8 2.Nf3 c3 3.bxc3 Rxc3 4.Kf2 Bc5 5.Nd4 Qe7 6.Bd3 Bxd4 7.exd4 Qa3
-/+ (-0.98) Depth: 15/47 00:00:36 121mN
1.Rxh7 Bxg5 2.Bxg6 fxg6 3.Rxb7 Bh4+ 4.Kf1 Qc8 5.Nf3 Qxb7 6.Nxh4 Qh7 7.Qg4 Rae8 8.Qxg6+ Kh8 9.e6 Qxh4
+/= (0.70) Depth: 15/49 00:01:16 247mN
1.Rxh7 Bxg5 2.Bxg6 fxg6 3.Rxb7 Bh4+ 4.Kf1 Qc8 5.Nf3 Qxb7 6.Nxh4 Qh7 7.Qg4 Rae8 8.Qxg6+ Kh8 9.e6 Qxh4
+/= (0.70) Depth: 15/49 00:01:16 249mN

(, Microsoft 28.09.2011)

zullil · Post by **zullil** » Wed Sep 28, 2011 3:27 pm

kgburcham wrote:Rxh7

[D] r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w Q -

Crafty does it:

Code: Select all

Crafty v23.4 &#40;8 cpus&#41;

White&#40;1&#41;&#58; setboard r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w Q - 0 1 
White&#40;1&#41;&#58; hash 2048M
Warning--  xboard 'memory' option disabled
hash table memory = 2048M bytes &#40;128M entries&#41;.
White&#40;1&#41;&#58; st 300
search time set to 300.00.
White&#40;1&#41;&#58; display stats
display statistics at end of each search.
White&#40;1&#41;&#58; disp

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

White&#40;1&#41;&#58; go
              time limit 5&#58;00 (+0.00&#41; &#40;5&#58;00&#41;
              depth   time  score   variation &#40;1&#41;
starting thread 1 2 3 4 5 6 7 <done>
                8     0.07  -0.80   1. Be2 Bc5 2. Rh3 a5 3. g4 Re8 4. Qc2
                                    Qd7
                8->   0.07  -0.80   1. Be2 Bc5 2. Rh3 a5 3. g4 Re8 4. Qc2
                                    Qd7
                9     0.09  -0.88   1. Be2 Bc5 2. Kf2 Re8 3. Qc2 Qd7 4.
                                    b3 Qc6 5. Nf3
                9->   0.10  -0.88   1. Be2 Bc5 2. Kf2 Re8 3. Qc2 Qd7 4.
                                    b3 Qc6 5. Nf3
               10     0.12  -1.20   1. Be2 Bc5 2. Nf1 b5 3. Bf3 a5 4. g4
                                    Re8 5. Qd2 Qd7
               10     0.14  -0.96   1. Bc2 Rc8 2. Nf3 c3 3. Rb1 cxb2 4.
                                    Rxb2 Ba3 5. Rb3 Qe7
               10     0.17  -0.86   1. Bf1 Qc8 2. Kf2 Qc5 3. Be2 Qb4 4.
                                    Qc2 Bc5 5. a3 Qb5
               10->   0.17  -0.86   1. Bf1 Qc8 2. Kf2 Qc5 3. Be2 Qb4 4.
                                    Qc2 Bc5 5. a3 Qb5 &#40;s=2&#41;
               11     0.19  -0.83   1. Bf1 Qc8 2. Kf2 Bb4 3. Be2 Re8 4.
                                    Bg4 Qc5 5. Qe2 Bc6 6. b3
               11->   0.20  -0.83   1. Bf1 Qc8 2. Kf2 Bb4 3. Be2 Re8 4.
                                    Bg4 Qc5 5. Qe2 Bc6 6. b3
               12     0.27  -0.76   1. Bf1 Qc8 2. Kf2 Qc5 3. Nf3 Qb4 4.
                                    Qc2 Rac8 5. Nd4 c3 6. Rb1 cxb2 7. Qxb2
               12->   0.28  -0.76   1. Bf1 Qc8 2. Kf2 Qc5 3. Nf3 Qb4 4.
                                    Qc2 Rac8 5. Nd4 c3 6. Rb1 cxb2 7. Qxb2
               13     0.36  -0.76   1. Bf1 a5 2. Qf3 Qc8 3. O-O-O c3 4.
                                    Nb3 cxb2+ 5. Kxb2 d4 6. e4 Qc3+ 7.
                                    Qxc3 dxc3+ 8. Kxc3 Bxe4
               13->   0.40  -0.76   1. Bf1 a5 2. Qf3 Qc8 3. O-O-O c3 4.
                                    Nb3 cxb2+ 5. Kxb2 d4 6. e4 Qc3+ 7.
                                    Qxc3 dxc3+ 8. Kxc3 Bxe4 &#40;s=2&#41;
               14     0.75  -0.69   1. Bf1 a5 2. Nf3 Rc8 3. Nd4 c3 4. bxc3
                                    Rxc3 5. Bd3 Qd7 6. Kf2 Rfc8 7. a4 Bc5
               14->   0.79  -0.69   1. Bf1 a5 2. Nf3 Rc8 3. Nd4 c3 4. bxc3
                                    Rxc3 5. Bd3 Qd7 6. Kf2 Rfc8 7. a4 Bc5
               15     1.18  -0.67   1. Bf1 a6 2. Qf3 Qc8 3. Rc1 Rd8 4.
                                    Qg3 Qc5 5. Qh3 Kf8 6. Kf2 Qb4 7. Rc2
                                    Qa4 8. Qh6+ Ke8
               15->   1.24  -0.67   1. Bf1 a6 2. Qf3 Qc8 3. Rc1 Rd8 4.
                                    Qg3 Qc5 5. Qh3 Kf8 6. Kf2 Qb4 7. Rc2
                                    Qa4 8. Qh6+ Ke8
               16     1.89  -0.91   1. Bf1 Rc8 2. Qg4 c3 3. bxc3 Rxc3 4.
                                    Qh3 h5 5. gxh6 Bc5 6. Be2 Bxe3 7. h7+
                                    Kh8 8. Qh6 Rc2 9. Nf3
               16     3.02  -0.68   1. Bc2 Rc8 2. Nf3 c3 3. b3 a5 4. Nd4
                                    Qd7 5. Kf2 Ba6 6. Qf3 Rfe8 7. Rad1
                                    Bb4 8. Kg3 Bb7
               16->   3.02  -0.68   1. Bc2 Rc8 2. Nf3 c3 3. b3 a5 4. Nd4
                                    Qd7 5. Kf2 Ba6 6. Qf3 Rfe8 7. Rad1
                                    Bb4 8. Kg3 Bb7 &#40;s=2&#41;
               17     3.83  -0.64   1. Bc2 Rc8 2. Nf3 c3 3. b3 a5 4. Nd4
                                    Qd7 5. Kf2 Ba6 6. Qf3 Rfe8 7. Rad1
                                    Bb4 8. Kg3 Bb7 9. a4
               17->   4.03  -0.64   1. Bc2 Rc8 2. Nf3 c3 3. b3 a5 4. Nd4
                                    Qd7 5. Kf2 Ba6 6. Qf3 Rfe8 7. Rad1
                                    Bb4 8. Kg3 Bb7 9. a4
               18     4.78  -0.70   1. Bc2 Rc8 2. Nf3 c3 3. b3 Re8 4. Nd4
                                    Bxg5 5. fxg5 Qxg5 6. Qe2 Rxe5 7. Rh3
                                    Rce8 8. e4 dxe4 9. Rxc3 Rd8
               18->   5.23  -0.70   1. Bc2 Rc8 2. Nf3 c3 3. b3 Re8 4. Nd4
                                    Bxg5 5. fxg5 Qxg5 6. Qe2 Rxe5 7. Rh3
                                    Rce8 8. e4 dxe4 9. Rxc3 Rd8
               19     8.10  -0.58   1. Bc2 Rc8 2. Nf3 c3 3. b3 Ba3 4. Nd4
                                    Bb2 5. Rb1 Qd7 6. Kf2 Rfe8 7. Qe2 Kh8
                                    8. a4 a6 9. Rbd1 Ba3 10. g4
               19->   8.81  -0.58   1. Bc2 Rc8 2. Nf3 c3 3. b3 Ba3 4. Nd4
                                    Bb2 5. Rb1 Qd7 6. Kf2 Rfe8 7. Qe2 Kh8
                                    8. a4 a6 9. Rbd1 Ba3 10. g4
               20    35.03  -0.70   1. Bc2 d4 2. Be4 dxe3 3. Bxb7 Bb4 4.
                                    Bxa8 Bxd2+ 5. Kf1 Qd3+ 6. Qe2 Rxa8
                                    7. Rh4 Qc2 8. Rd1 Qxb2 9. e6 Qxa2 10.
                                    exf7+ Kxf7 11. Rxh7+ Ke6 12. Rc7
               20    42.43  -0.57   1. Bf1 Rc8 2. Kf2 c3 3. bxc3 Rxc3 4.
                                    Nf3 a6 5. Nd4 b5 6. Bd3 Qd7 7. Qd2
                                    Rfc8 8. Rac1 Bb4 9. Rxc3 Bxc3 10. Qe2
                                    Bb4
               20->  42.43  -0.57   1. Bf1 Rc8 2. Kf2 c3 3. bxc3 Rxc3 4.
                                    Nf3 a6 5. Nd4 b5 6. Bd3 Qd7 7. Qd2
                                    Rfc8 8. Rac1 Bb4 9. Rxc3 Bxc3 10. Qe2
                                    Bb4 &#40;s=2&#41;
               21    44.93  -0.57   1. Bf1 Rc8 2. Kf2 c3 3. bxc3 Rxc3 4.
                                    Nf3 a6 5. Nd4 b5 6. Bd3 Qd7 7. Qe2
                                    Rfc8 8. Rab1 Ba3 9. Kg3 Bc5 10. Qd2
                                    b4 11. f5
               21->  50.93  -0.57   1. Bf1 Rc8 2. Kf2 c3 3. bxc3 Rxc3 4.
                                    Nf3 a6 5. Nd4 b5 6. Bd3 Qd7 7. Qe2
                                    Rfc8 8. Rab1 Ba3 9. Kg3 Bc5 10. Qd2
                                    b4 11. f5 &#40;s=4&#41;
               22     1&#58;18  -0.43   1. Bf1 Rc8 2. Nf3 Bb4+ 3. Kf2 c3 4.
                                    bxc3 Bxc3 5. Rb1 Qe7 6. Nd4 Qa3 7.
                                    Qb3 Qxb3 8. axb3 Bxd4 9. exd4 Rc2+
                                    10. Kg3 Rc3+ 11. Kf2 Rfc8 12. g4 Rc2+
                                    13. Be2 Kg7 &#40;s=3&#41;
               22->   1&#58;44  -0.43   1. Bf1 Rc8 2. Nf3 Bb4+ 3. Kf2 c3 4.
                                    bxc3 Bxc3 5. Rb1 Qe7 6. Nd4 Qa3 7.
                                    Qb3 Qxb3 8. axb3 Bxd4 9. exd4 Rc2+
                                    10. Kg3 Rc3+ 11. Kf2 Rfc8 12. g4 Rc2+
                                    13. Be2 Kg7 &#40;s=2&#41;
               23     1&#58;55  -0.48   1. Bf1 Rc8 2. Nf3 Bb4+ 3. Kf2 c3 4.
                                    bxc3 Bxc3 5. Rb1 Qe7 6. Nd4 Qa3 7.
                                    Qb3 Qa5 8. Nb5 Rc5 9. Nd6 Bc6 10. Bd3
                                    d4 11. e4 Bd2 12. e6 Be3+ 13. Kg3
               23     2&#58;48  -0.14   1. Rxh7 Qe8 2. Kf2 Kxh7 3. Qh1+ Kg8
                                    4. Qh6 Bxg5 5. Qxg5 f6 6. exf6 Qf7
                                    7. Bxg6 Qxf6 8. Qh5 Rfd8 9. Qh7+ Kf8
                                    10. Rh1 Bc6 11. g4 d4 12. Qh6+ Qg7
                                    13. Qxg7+ Kxg7
               23->   2&#58;48  -0.14   1. Rxh7 Qe8 2. Kf2 Kxh7 3. Qh1+ Kg8
                                    4. Qh6 Bxg5 5. Qxg5 f6 6. exf6 Qf7
                                    7. Bxg6 Qxf6 8. Qh5 Rfd8 9. Qh7+ Kf8
                                    10. Rh1 Bc6 11. g4 d4 12. Qh6+ Qg7
                                    13. Qxg7+ Kxg7 &#40;s=3&#41;
               24     3&#58;02  -0.05   1. Rxh7 Qe8 2. Kf2 Kxh7 3. Qh1+ Kg8
                                    4. Qh6 Bxg5 5. Qxg5 f6 6. exf6 Qf7
                                    7. Bxg6 Qxf6 8. Qh5 Qh8 9. g4 Qxh5
                                    10. Bxh5 Rac8 11. g5 Kg7 12. Rh1 c3
                                    13. bxc3 Rxc3 &#40;s=2&#41;
              time=5&#58;00  mat=0  n=6606575926  fh=90%  nps=22.0M       
              extensions=106.8M qchecks=226.2M reduced=787.5M pruned=1935.9M
              predicted=0  evals=2101.7M  50move=0  EGTBprobes=0  hits=0
              SMP->  splits=72712  aborts=10714  data=36/512  elap=5&#58;00
terminating SMP processes.
White&#40;1&#41;&#58; Rxh7
              time used&#58;   5&#58;00

Jouni · Post by **Jouni** » Thu Sep 29, 2011 10:56 am

Critter in 2 best mode after 2 hours and 25 plies:

Analysis by Critter 1.2 64-bit:

1. +/= (0.45): 1.Kf2 Bxg5 2.fxg5 d4 3.Nxc4 Qxg5 4.Rh2 b5 5.Na5 Qxe3+ 6.Kf1 Bd5 7.Qe2 Qf4+ 8.Kg1 Rac8 9.Re1 Rc1 10.Rh4 Qxh4 11.Rxc1 Qg5 12.Rc5 Bxg2 13.Qxg2 Qe3+ 14.Kh2 Qxd3 15.Nb3 Rd8 16.Qd2 Qxd2+ 17.Nxd2 a6 18.Kg3 Kg7 19.Rc7
2. +/= (0.41): 1.Rxh7 Bxg5 2.Bxg6 fxg6 3.Rxb7 Bh4+ 4.Kf1 Qc8 5.Nf3 Qxb7 6.Nxh4 Rf7 7.Nxg6 Qd7 8.Kg1 d4 9.Qh5 Rh7 10.Qg5 dxe3 11.Ne7+ Kh8 12.Qf6+ Rg7 13.Nf5 Rag8 14.Nxg7 Rxg7 15.Re1 Qg4 16.Qc6 Qxf4 17.Qc8+ Kh7 18.Qh3+ Kg8 19.Rxe3 Qg4 20.Qf3 Qxf3 21.Rxf3 Rd7 22.e6

Is there really winning move at all?!

Jouni

zullil · Post by **zullil** » Thu Sep 29, 2011 12:01 pm

kgburcham wrote:Rxh7

[D] r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w Q -

According to the FEN string, White cannot castle on the kingside. Did you intend this, or is it a typo? I wonder how changing the FEN string to

r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w KQ -

will affect engine's analyses.

zullil · Post by **zullil** » Thu Sep 29, 2011 1:08 pm

Critter-1.2.1 (8 threads, 2 GB hash, MultiPV=2) on the version of the position in which White is allowed to castle kingside:

Code: Select all

25/87  60&#58;47 40305746881 11048824  +0.83 Rxh7 Bxg5 Bxg6 fxg6 Rxb7 Bh4+ Kf1 Qc8 Nf3 Qxb7 Nxh4 g5 Ng6 gxf4 exf4 Rf7 Qg4 c3 bxc3 Qc7 Rd1 Qc4+ Kg1 Qxc3 Ne7+ Kf8 Nxd5 Qc5+ Kf1 Qc4+ Qe2 Rc8 Kf2 Rh7 Qxc4 Rxc4 Kf3 Rh2

25/87  60&#58;47 40305746881 11048824  +0.43 Kf2 d4 Nxc4 dxe3+ Kg3 Rc8 Qe2 b5 Nxe3 Bxg5 Rad1 Bxf4+ Kxf4 Qd4+ Kg3 Qxe5+ Kf2 Rc5 Ng4 Qd4+ Kf1 Rd8 Nf2 Qf4 Rh3 Rg5 g3 Rxg3 Rxg3 Qxg3 Bxb5 Rxd1+ Qxd1 h5 Qd8+ Kh7

kgburcham · Post by **kgburcham** » Thu Sep 29, 2011 2:12 pm

zullil wrote:
kgburcham wrote:Rxh7

[D] r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w Q -
According to the FEN string, White cannot castle on the kingside. Did you intend this, or is it a typo? I wonder how changing the FEN string to
r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w KQ -
will affect engine's analyses.

You might be correct Louis.
I will try to find the position.

kgburcham

zullil · Post by **zullil** » Thu Sep 29, 2011 2:32 pm

zullil wrote:Critter-1.2.1 (8 threads, 2 GB hash, MultiPV=2) on the version of the position in which White is allowed to castle kingside:

Code: Select all

25/87  60&#58;47 40305746881 11048824  +0.83 Rxh7 Bxg5 Bxg6 fxg6 Rxb7 Bh4+ Kf1 Qc8 Nf3 Qxb7 Nxh4 g5 Ng6 gxf4 exf4 Rf7 Qg4 c3 bxc3 Qc7 Rd1 Qc4+ Kg1 Qxc3 Ne7+ Kf8 Nxd5 Qc5+ Kf1 Qc4+ Qe2 Rc8 Kf2 Rh7 Qxc4 Rxc4 Kf3 Rh2

25/87  60&#58;47 40305746881 11048824  +0.43 Kf2 d4 Nxc4 dxe3+ Kg3 Rc8 Qe2 b5 Nxe3 Bxg5 Rad1 Bxf4+ Kxf4 Qd4+ Kg3 Qxe5+ Kf2 Rc5 Ng4 Qd4+ Kf1 Rd8 Nf2 Qf4 Rh3 Rg5 g3 Rxg3 Rxg3 Qxg3 Bxb5 Rxd1+ Qxd1 h5 Qd8+ Kh7

A bit more:

Code: Select all

26/88  145&#58;25 98620392081 11302676  +0.94 Rxh7 Bxg5 Bxg6 fxg6 Rxb7 Bh4+ Kf1 Qc8 Nf3 Qxb7 Nxh4 g5 Ng6 gxf4 exf4 Rf7 Qg4 c3 bxc3 Re8 f5 Rg7 Qh4 Rxg6 fxg6 Qe7 Qh5 Qg7 Re1 Re6 Kg1 Rxg6 Qh3 Qc7 Re3 Qe7 e6

26/88  145&#58;25 98620392081 11302676  +0.47 Kf2 d4 Nxc4 dxe3+ Kg3 Rc8 Qe2 b5 Nxe3 Bxg5 Rad1 Bxf4+ Kxf4 Qd4+ Kg3 Qxe5+ Kf2 Rc5 Ng4 Qd4+ Kf1 Rd8 Nf2 Qf4 Rh3 Rg5 g3 Rxg3 Rxg3 Qxg3 Bxb5 Rxd1+ Qxd1 Bg2+ Ke1 h5

zullil · Post by **zullil** » Thu Sep 29, 2011 2:33 pm

kgburcham wrote:
zullil wrote:
kgburcham wrote:Rxh7

[D] r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w Q -
According to the FEN string, White cannot castle on the kingside. Did you intend this, or is it a typo? I wonder how changing the FEN string to
r2q1rk1/pb2bp1p/1p4p1/3pP1P1/2p2P2/3BP3/PP1N2P1/R2QK2R w KQ -
will affect engine's analyses.
You might be correct Louis.
I will try to find the position.

kgburcham

Doesn't seem to matter in the end, though at lower depths Critter had several PVs that included O-O.

old test position

old test position

Re: old test position

Re: old test position

Re: old test position

Re: old test position

Re: old test position

Re: old test position

Re: old test position

Re: old test position

Re: old test position