Appendix  --  Experimental Setup

• Test suites ``Encyclopedia of Chess Middlegames'' (ECM, 879 positions), ``Win at Chess'' (WAC, 300 positions), and ``1001 Winning Chess Sacrifices'' (WCS, 1001 positions) as available on the Internet,

• 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''.