weight[pos - first_pos] = 1000 * (uint32)entry->count;
if(option_get_bool(Option,"BookLearn")) // [HGM] improvised use of learn info
- weight[pos - first_pos] *= ((uint32)entry->n + 10.) /((uint32)entry->sum + 1.);
+ weight[pos - first_pos] *= ((uint32)entry->sum + 4.) / (2.*(uint32)entry->n - (uint32)entry->sum + 4.);
sum += weight[pos - first_pos];
}