Starting position

Score: 4.6748 Proof: 47959 Disproof: 391125

Move	Score	Proof	Disproof	Size
e3	4.6748	68098	195444	3601481
c4	2.2000	87438	33696	197254
Nh3	0.9844	87225	31104	73468
g3	0.7408	87203	43453	76739
Na3	0.5553	86814	15511	47661
g4	0.5500	87415	20512	30870
b3	0.5254	87285	16155	61197
a3	0.2214	87462	5818	10667
c3	0.1944	87359	9359	36908
f3	0.1926	87688	2807	67324
a4	0.1777	86834	8845	14620
h3	0.1499	87426	4761	12664
b4	0.0560	47959	3660	22386
h4	LOST	∞	0	2126
f4	LOST	∞	0	1983
Nf3	LOST	∞	0	1261
Nc3	LOST	∞	0	670
d3	LOST	∞	0	1
d4	LOST	∞	0	1
e4	LOST	∞	0	1

About this page

This is Nilatac's opening book. Nilatac is my suicide chess program and you can find more about it at Nilatac's page. Nodes marked as "LOST" without further descendants are solvable (by Nilatac) using a PN search of 2,000,000 nodes or less.

There are several persons I want to thank here for helping me:

• Ben Nye (angrim on FICS) for giving me countless worthy ideas that helped me optimize Nilatac, from endgame tables to alpha-beta to PN search. In particular, he helped me finish the proof for e3 c6 (this particular line). This has literally saved me from insanity.
• Lenny Taelman (lenthep on FICS) for hosting a great collection of suicide openings, as well as a 4-piece endgame browser; also for lending me the graphical images you're seeing.
• Vladica Andrejic (AndrewTheAlmighty on FICS) for sharing his knowledge of openings with me and helping me solve some openings, in particular e3 c6; for beating Nilatac a great number of times, thus giving me material to work with in improving Nilatac; and for asking to see Nilatac's proofs so many times, that I ended up writing this script to make the book browsable online :-)
• and, of course, Dennis Breuker and Victor Allis for developing the proof number search algorithm.

Also, here are other pages on chess and variants that you might want to visit (this list is by no means comprehensive):

• http://wildchess.org/ – a browsable collection of games played by top-rated players on FICS. Made by Siggemannen.
• http://www.matf.bg.ac.yu/~andrew/suicide/ – A suicide chess review page written by AndrewTheAlmighty.