Author: Miguel A. Ballicora
Date: 13:35:09 03/02/01
Go up one level in this thread
On March 02, 2001 at 14:39:10, Sune Larsson wrote:
>
> [D]1k3b1q/pP2p1p1/P1K1P1Pp/7P/2B5/8/8/8 w - - 0 1
>
> Horwitz,B 1885
>
> This one might prove as mission impossible. Black is totally paralysed
> from start and white is winning - but how?? Maybe more amusing for
> humans than for silicons. One could characterize black's position
> as slightly passive ;) but how could white make progress. Looks hard...
>
> Test: Win it! Draw scores like 0.00 are not trusted...
>
> Sune
My humble Gaviota (experimental version) sees the winning line giving and
advantage at ply 13 after 1.7 seconds.
+-----------------+
| . k . . . b . q |
| x o . . x . x . |
| o . K . o . o x |
| . . . . . . . o |
| . . B . . . . . |
| . . . . . . . . |
| . . . . . . . . |
| . . . . . . . . |
+-----------------+
Ply: 12
Bc4-d3 Qh8-g8 Bd3-c4 Qg8xe6 Bc4xe6
Score: 0.00 (0) Evals: 9473 Time: 0.2s nps: 161868 Q/all: 0.04
nodes cutoffs missed tree_exp
path 34339 8610 229 1.03
quies 1272 784 70 1.09
all 35611 9394 299 1.03
hashtable= attempts: 34102 hits: 55.6% perfect: 38.5%
Accum. TOTAL--> Time: 0.44s Nodes: 69129 nps: 157111
Ply: 13
Kc6-d5 Qh8-g8 Bc4-b5 Kb8-c7 Bb5-e8 Qg8-h8 Be8-f7 Kc7-b6
b7-b8=Q8 Kb6xa6 Qb8-f4
Score: 0.15 (39) Evals: 23721 Time: 0.5s nps: 162469 Q/all: 0.05
nodes cutoffs missed tree_exp
path 77529 19390 773 1.04
quies 3868 2209 39 1.02
all 81397 21599 812 1.04
hashtable= attempts: 76836 hits: 52.2% perfect: 37.0%
Accum. TOTAL--> Time: 0.94s Nodes: 150526 nps: 159964
FAILED HIGH...
Ply: 13
Kc6-d5
Score: 0.93 (239) Evals: 7532 Time: 0.1s nps: 140569 Q/all: 0.09
nodes cutoffs missed tree_exp
path 16688 4571 346 1.08
quies 1586 945 26 1.03
all 18274 5516 372 1.07
hashtable= attempts: 16632 hits: 39.7% perfect: 24.4%
Accum. TOTAL--> Time: 1.07s Nodes: 168800 nps: 157610
FAILED LOW...
Ply: 13
Score: 0.93 (238) Evals: 32777 Time: 0.7s nps: 165908 Q/all: 0.04
nodes cutoffs missed tree_exp
path 114663 27483 791 1.03
quies 4957 2665 97 1.04
all 119620 30148 888 1.03
hashtable= attempts: 113941 hits: 55.8% perfect: 39.2%
Accum. TOTAL--> Time: 1.79s Nodes: 288420 nps: 160949
Ply: 14
Kc6-d5 Qh8-g8 Bc4-b5 Qg8-h8 Bb5-e8 Qh8-g8 Be8-f7 Qg8xf7
e6xf7 Kb8-c7 Kd5-e5 Kc7-b8
Score: 0.59 (151) Evals: 582554 Time: 9.2s nps: 148486 Q/all: 0.10
nodes cutoffs missed tree_exp
path 1237269 269770 54631 1.20
quies 133698 61305 3180 1.05
all 1370967 331075 57811 1.17
hashtable= attempts: 1232493 hits: 48.7% perfect: 31.9%
Accum. TOTAL--> Time: 11.03s Nodes: 1659387 nps: 150511
Ply: 15
Kc6-d5 Qh8-g8 Bc4-b5 Qg8-h8 Bb5-e8 Qh8-g8 Be8-f7 Qg8xf7
g6xf7 Kb8-c7 Kd5-c5 g7-g5 h5xg6ep h6-h5 Kc5-d5 Bf8-g7
Score: 0.89 (228) Evals: 48019 Time: 1.0s nps: 173134 Q/all: 0.06
nodes cutoffs missed tree_exp
path 163716 37549 1564 1.04
quies 9764 5007 54 1.01
all 173480 42556 1618 1.04
hashtable= attempts: 162287 hits: 59.8% perfect: 41.0%
Accum. TOTAL--> Time: 12.03s Nodes: 1832867 nps: 152396
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