Bad move ordering at low plies
Matthies opened this issue · 0 comments
Matthies commented
I did some statistics about how many moves need to be played in average in different plies:
2020-06-11 13:20:38,153<--1:(ST) ply: 1 quiets-nonpv: --- tactics-nonpv: --- quiets-pv: 11.03 tactics-pv: 0.65
2020-06-11 13:20:38,155<--1:(ST) ply: 2 quiets-nonpv: 0.93 tactics-nonpv: 0.12 quiets-pv: 11.56 tactics-pv: 0.86
2020-06-11 13:20:38,158<--1:(ST) ply: 3 quiets-nonpv: 2.13 tactics-nonpv: 0.23 quiets-pv: 8.87 tactics-pv: 0.72
2020-06-11 13:20:38,160<--1:(ST) ply: 4 quiets-nonpv: 0.99 tactics-nonpv: 0.15 quiets-pv: 9.51 tactics-pv: 0.74
2020-06-11 13:20:38,161<--1:(ST) ply: 5 quiets-nonpv: 1.41 tactics-nonpv: 0.22 quiets-pv: 7.81 tactics-pv: 0.63
2020-06-11 13:20:38,164<--1:(ST) ply: 6 quiets-nonpv: 0.92 tactics-nonpv: 0.18 quiets-pv: 7.74 tactics-pv: 0.66
2020-06-11 13:20:38,168<--1:(ST) ply: 7 quiets-nonpv: 1.01 tactics-nonpv: 0.20 quiets-pv: 6.92 tactics-pv: 0.62
2020-06-11 13:20:38,171<--1:(ST) ply: 8 quiets-nonpv: 0.84 tactics-nonpv: 0.19 quiets-pv: 6.74 tactics-pv: 0.63
2020-06-11 13:20:38,174<--1:(ST) ply: 9 quiets-nonpv: 0.86 tactics-nonpv: 0.20 quiets-pv: 6.26 tactics-pv: 0.58
2020-06-11 13:20:38,176<--1:(ST) ply: 10 quiets-nonpv: 0.76 tactics-nonpv: 0.20 quiets-pv: 5.77 tactics-pv: 0.59
2020-06-11 13:20:38,177<--1:(ST) ply: 11 quiets-nonpv: 0.78 tactics-nonpv: 0.19 quiets-pv: 5.46 tactics-pv: 0.52
2020-06-11 13:20:38,180<--1:(ST) ply: 12 quiets-nonpv: 0.71 tactics-nonpv: 0.19 quiets-pv: 5.00 tactics-pv: 0.58
2020-06-11 13:20:38,183<--1:(ST) ply: 13 quiets-nonpv: 0.72 tactics-nonpv: 0.18 quiets-pv: 4.69 tactics-pv: 0.49
2020-06-11 13:20:38,186<--1:(ST) ply: 14 quiets-nonpv: 0.67 tactics-nonpv: 0.18 quiets-pv: 4.28 tactics-pv: 0.53
2020-06-11 13:20:38,188<--1:(ST) ply: 15 quiets-nonpv: 0.68 tactics-nonpv: 0.17 quiets-pv: 3.97 tactics-pv: 0.45
2020-06-11 13:20:38,191<--1:(ST) ply: 16 quiets-nonpv: 0.64 tactics-nonpv: 0.17 quiets-pv: 3.74 tactics-pv: 0.48
2020-06-11 13:20:38,193<--1:(ST) ply: 17 quiets-nonpv: 0.65 tactics-nonpv: 0.16 quiets-pv: 3.44 tactics-pv: 0.43
2020-06-11 13:20:38,194<--1:(ST) ply: 18 quiets-nonpv: 0.62 tactics-nonpv: 0.15 quiets-pv: 3.34 tactics-pv: 0.43
2020-06-11 13:20:38,197<--1:(ST) ply: 19 quiets-nonpv: 0.62 tactics-nonpv: 0.15 quiets-pv: 2.97 tactics-pv: 0.38
Shows that move ordering in low plies especially for quiet moves and in odd plies doesn't work very well.
Odd/even difference may have to do with cut nodes.