Move ordering competition

At Talkchess Ed Schroeder launched a not to serious move ordering competition. The idea is to find out which program is most successful in ordering a move that gives a cutoff early in the list.



So basically every time a cutoff happens it is recorded at which move it happens. The sooner the better. Finally a ratio is build using a 30 second search with 10 positions.

iCE did not do so well here. This is not surprising as I spend only little effort in ordering the later moves. In more than 90% I get a cutoff at the first move and I did not care so much about the other 10%. I don't have history tables or a counter move heuristic. But obviously other (and stronger) programs do.

So this is something that makes in onto my todo list.

Engine	Pos 1	Pos 2	Pos 3	Pos 4	Pos 5	Pos 6	Pos 7	Pos 8	Pos 9	Pos 10	Average	Rank
ProDeo 1.85	1.35	1.51	1.22	1.42	1.34	1.26	1.27	1.19	1.35	1.42	1.330	6
Komodo CCT	1.32	1.24	1.25	1.30	1.23	1.28	1.23	1.25	1.25	1.25	1.260	4
Texel 1.02a25	1.20	1.24	1.17	1.32	1.17	1.13	1.16	1.14	1.15	1.16	1.184	2
Nimrod	1.47	1.22	1.20	1.25	1.33	1.42	1.47	1.38	1.33	1.41	1.348	8
Cheese 1.5 beta	1.39	1.30	1.24	1.32	1.40	1.35	1.32	1.32	1.38	1.31	1.333	7
Rookie v3.7	1.32	1.24	1.23	1.25	1.20	1.20	1.27	1.26	1.28	1.19	1.244	3
Crafty 23.6	1.41	1.43	1.30	1.47	1.29	1.23	1.29	1.26	1.28	1.24	1.320	5
WaDuuttie	1.45	1.49	1.33	1.41	1.37	1.37	1.35	1.40	1.37	1.43	1.397	10
Ice 0.4	1.56	1.36	1.25	1.37	1.46	1.42	1.21	1.26	1.58	1.31	1.378	9
Fairy-Max 4.8R	2.20	3.69	2.64	3.93	3.10	2.77	2.27	2.52	3.10	3.16	2.938	12
Troy32 4.46	1.20	1.16	1.15	1.20	1.19	1.17	1.19	1.20	1.15	1.17	1.178	1
Vajolet 2.13	1.44	1.54	1.41	1.66	1.50	1.38	1.39	1.72	1.39	1.40	1.483	11