Performance on Test Suites as of October 31, 1997

Test Configuration

• DARKTHOUGHT as of October 31, 1997 with 8M transposition-table entries (4M per side), 1M King hash-table entries (512K per side), and 512K Pawn hash-table entries,

• Digital Unix 4.0b program development tools and operating system,

• 500MHz AlphaPC164 workstation (500MHz DEC Alpha-21164a EV56 CPU, 8KB/8KB on-chip I/D L1 caches, 96KB unified on-chip L2 cache, 1MB unified off-chip L3 cache, DEC PC164 mainboard, 8x16MB PS/2 SIMMs = 128MB RAM) as provided by Digital Equipment Corp. under external technology research contract DE-0032-97 entitled ``Optimization and Fine-Tuning of a Sophisticated Tree-Searching Application for 64-bit Alpha CPUs''.

Test-Suite Results

Test Suite	Time	Result	Speed
BS-2830   ( DARKTHOUGHT rating = 2659)	15 min.	15 / 27	231K nps
BT-2630   ( DARKTHOUGHT rating = 2510)	15 min.	27 / 30	270K nps
LCT-II     ( DARKTHOUGHT rating = 2530)	10 min.	26 / 35	257K nps
Bratko / Kopec	1 min.	18 / 24	217K nps
Encyclopedia of Chess Middlegames	20 sec.	605 / 879	253K nps
Win at Chess	5 sec.	286 / 300	269K nps
World's Greatest Chess Games	10 sec.	22 / 50	229K nps
1001 Brilliant Ways to Checkmate	5 sec.	947 / 1001	319K nps
1001 Winning Chess Sacrifices	5 sec.	827 / 1001	264K nps
Nolot Positions   (#1 Nxh6! 16:04 min. -	60 min.	3 / 11	215K nps
#10 Rxf7! 39:52 min. - #11 Rxh6! 2:14 min.)

Solution Times for BS-2830

#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	(in sec.)
240	18	-	10	-	151	22	-	24	228	#00
-	262	27	-	-	-	-	-	813	-	#10
353	200	131	20	-	-	36				#20

Solution Times for BT-2630

#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	(in sec.)
0	2	4	39	0	0	0	0	-	5	#00
1	7	315	2	7	-	13	0	49	4	#10
79	2	0	5	12	-	2	90	206	43	#20

Solution Times for LCT-II

#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	(in sec.)
13	0	491	-	73	35	280	-	13	-	#00
44	-	445	0	6	0	11	88	13	9	#10
14	11	-	15	-	-	0	0	3	35	#20
5	1	21	-	-						#30

Measured Peak Speed = 725K nps

(in position ``8/8/7K/8/6p1/6k1/4R3/8 w - - 0 1'' from ECE3 with timing = 5 sec).