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<TD align=middle>4</TD>
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<TD align=right><B>#20</B></TD></TR>
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<TD align=right><B>#30</B></TD></TR></TBODY></TABLE>
<P><BR>
<P><FONT size=+1><B>Measured Peak Speed = 900K nps</B></FONT> <BR>
<P></P>(in position ``8/8/7K/8/6p1/6k1/4R3/8 w - - 0 1'' from ECE3 with timing =
5 sec). <BR>
<P>
<P><BR>
<P></P>
<P><FONT size=+2><B>Test Configuration</B></FONT> </P></DIV>
<P>
<UL>
<P>
<LI>D<SMALL>ARK</SMALL>T<SMALL>HOUGHT</SMALL> as of March 31, 1998 with
8M transposition-table entries (4M per side), 1M King hash-table entries (512K
per side), and 512K Pawn hash-table entries,
<P></P>
<P></P>
<LI>Digital Unix 4.0d program development tools and operating system,
<P></P>
<P></P>
<LI>600MHz AlphaLX164 workstation (600MHz DEC Alpha-21164a EV56 CPU, 8KB/8KB
on-chip I/D L1 caches, 96KB unified on-chip L2 cache, 2MB unified off-chip L3
cache, DEC PC164-LX mainboard, 2x 128MB/100MHz SDRAM-DIMMs = 256MB RAM).
<P></P></LI></UL>
<P><BR>
<HR>
<!--Table of Child-Links--><A name=CHILD_LINKS> </A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node1.html"
name=tex2html73>Acknowledgements
<P></P></A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node2.html"
name=tex2html74>How DarkThought Plays Chess <BR><FONT size=-1>(Preprint of an
article by Ernst A. Heinz in: ICCA Journal, Vol. 20(3), pp. 166-176, Sept.
1997)</FONT></A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node3.html"
name=tex2html75>Abstract</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node4.html"
name=tex2html76>Introduction</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node5.html"
name=tex2html77>Implementation History</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node6.html"
name=tex2html78>Bitboard Engine</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node7.html"
name=tex2html79>Bitboard Infrastructure</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node8.html"
name=tex2html80>Rotated Bitboards</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node9.html"
name=tex2html81>Search Engine</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node10.html"
name=tex2html82>Node Expansion</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node11.html"
name=tex2html83>Extension Heuristics</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node12.html"
name=tex2html84>Search Parameterization</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node13.html"
name=tex2html85>Evaluation Engine</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node14.html"
name=tex2html86>Programmable Evaluation Function</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node15.html"
name=tex2html87>Evaluation Machines</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node16.html"
name=tex2html88>Future Work</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node17.html"
name=tex2html89>Appendix -- Performance on Test Suites
as of July 31, 1997
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node18.html"
name=tex2html90>Extended Futility Pruning <BR><FONT size=-1>(Preprint of an
article by Ernst A. Heinz in: ICCA Journal, Vol. 21(2), pp. 75-83,
June 1998)</FONT></A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node19.html"
name=tex2html91>Abstract</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node20.html"
name=tex2html92>Introduction</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node21.html"
name=tex2html93>Related Work</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node22.html"
name=tex2html94>Futility Pruning at Frontier Nodes</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node23.html"
name=tex2html95>Theory</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node24.html"
name=tex2html96>Practice</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node25.html"
name=tex2html97>Futility Pruning at Pre-Frontier Nodes</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node26.html"
name=tex2html98>Theory</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node27.html"
name=tex2html99>Practice</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node28.html"
name=tex2html100>Limited Razoring at Pre-Pre-Frontier Nodes</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node29.html"
name=tex2html101>Theory</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node30.html"
name=tex2html102>Practice</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node31.html"
name=tex2html103>Conclusion</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node32.html"
name=tex2html104>Appendix -- Experimental Setup
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node33.html"
name=tex2html105>Efficient Interior-Node Recognition <BR><FONT
size=-1>(Preprint of an article by Ernst A. Heinz in: ICCA Journal, Vol.
21(3), pp. 156-167, Sept. 1998)</FONT></A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node34.html"
name=tex2html106>Abstract</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node35.html"
name=tex2html107>Introduction</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node36.html"
name=tex2html108>Fundamentals of Interior-Node Recognition</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node37.html"
name=tex2html109>Recognizers and Transposition Tables</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node38.html"
name=tex2html110>Recognizer Results</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node39.html"
name=tex2html111>Recognizer Scores</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node40.html"
name=tex2html112>Efficient Detection and Selection of Recognizers</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node41.html"
name=tex2html113>Material Signatures</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node42.html"
name=tex2html114>Further Empirical Refinements</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node43.html"
name=tex2html115>Recognizer Functions</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node44.html"
name=tex2html116>Implementation Example</A> </LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node45.html"
name=tex2html117>Discussion and Conclusion
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node46.html"
name=tex2html118>DarkThought Goes Deep <BR><FONT size=-1>(Preprint of an
article by Ernst A. Heinz in: ICCA Journal, Vol. 21(4), pp. 228-244, Dec.
1998)</FONT></A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node47.html"
name=tex2html119>Abstract</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node48.html"
name=tex2html120>Introduction</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node49.html"
name=tex2html121>Relating Search Depth to the Strength of Chess Programs</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node50.html"
name=tex2html122>Newborn's Hypothesis Concerning the Strength of Chess
Programs</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node51.html"
name=tex2html123>Corrected Test Positions</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node52.html"
name=tex2html124>Experimental Results</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node53.html"
name=tex2html125>``Best Change'' Rates for All Test Positions</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node54.html"
name=tex2html126>Experimental Results for All Test Positions</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node55.html"
name=tex2html127>Experimental Results for the Opening Positions</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node56.html"
name=tex2html128>Experimental Results for the Middle-Game Positions</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node57.html"
name=tex2html129>Experimental Results for the Remaining Positions</A>
</LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node58.html"
name=tex2html130>Conclusion</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node59.html"
name=tex2html131>Acknowledgements</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node60.html"
name=tex2html132>Appendix A -- Experimental Setup</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node61.html"
name=tex2html133>Appendix B -- Bounds on the ``Best
Change'' Probabilities</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node62.html"
name=tex2html134>Appendix C -- Experimental Results of
Crafty in 1997
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node63.html"
name=tex2html135>DarkThought at Test Games (1998-1999)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node64.html"
name=tex2html136>Games Played by DarkThought from Nunn Position #2 (ECO
B89)</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node65.html"
name=tex2html137>Games Played by DarkThought from Nunn Position #3 (ECO
C19)</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node66.html"
name=tex2html138>Games Played by DarkThought from Nunn Position #4 (ECO
C97)</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node67.html"
name=tex2html139>Games Played by DarkThought from Nunn Position #5 (ECO
D36)</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node68.html"
name=tex2html140>Games Played by DarkThought from Nunn Position #7 (ECO
E15)</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node69.html"
name=tex2html141>Games Played by DarkThought from Nunn Position #8 (ECO
E98)</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node70.html"
name=tex2html142>Games Played by DarkThought from Nunn Position #9 (ECO A25)
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node71.html"
name=tex2html143>DarkThought at 1st Match vs. XXXX-II (January 1998)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node72.html"
name=tex2html144>Games Played by DarkThought at 1st Match vs. XXXX-II
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node73.html"
name=tex2html145>DarkThought at 15th WMCC (October 1997)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node74.html"
name=tex2html146>Final Standings of 15th WMCC</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node75.html"
name=tex2html147>Games Played by DarkThought at 15th WMCC
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node76.html"
name=tex2html148>DarkThought at 1st Karlsruher UniSchau (June 1997)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node77.html"
name=tex2html149>Games Played by DarkThought at 1st Karlsruher UniSchau
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node78.html"
name=tex2html150>DarkThought at 12th AEGON Man-Machine (April 1997)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node79.html"
name=tex2html151>Games Played by DarkThought at 12th AEGON Man-Machine
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node80.html"
name=tex2html152>DarkThought at 14th WMCC (October 1996)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node81.html"
name=tex2html153>Final Standings of 14th WMCC</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node82.html"
name=tex2html154>Games Played by DarkThought at 14th WMCC
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node83.html"
name=tex2html155>DarkThought at 11th AEGON Man-Machine (April 1996)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node84.html"
name=tex2html156>Games Played by DarkThought at 11th AEGON Man-Machine
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node85.html"
name=tex2html157>DarkThought at 13th WMCC (October 1995)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node86.html"
name=tex2html158>Final Standings of 13th WMCC</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node87.html"
name=tex2html159>Games Played by DarkThought at 13th WMCC
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node88.html"
name=tex2html160>DarkThought at 8th WCCC (May 1995)</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node89.html"
name=tex2html161>Final Standings of 8th WCCC</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node90.html"
name=tex2html162>Games Played by DarkThought at 8th WCCC
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node91.html"
name=tex2html163>Previous Performance on Test Suites</A>
<UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node92.html"
name=tex2html164>Performance on Test Suites as of October 31, 1997</A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node93.html"
name=tex2html165>Performance on Test Suites as of July 31, 1997
<P></P></A></LI></UL>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node94.html"
name=tex2html166>Selected References of DarkThought
<P></P></A>
<LI><A href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node95.html"
name=tex2html167>Bibliography</A>
</LI></UL><!--End of Table of Child-Links--><BR>
<HR>
<ADDRESS>Created by <A href="mailto:heinze@ira.uka.de">Ernst A. Heinz</A>, Thu
Feb 4 14:12:12 MET 1999 </ADDRESS></BODY></HTML>
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