ojhPositional64cr function hashes
64-bit Positional ranks only
Implementation
int ojhPositional64cr(Iterable<Rank> ranks) {
int max = 16;
int h = 0;
for (Rank r in ranks) {
max -= 1;
assert(max >= 0);
h <<= 4;
h += (0x0F & r.index);
}
return h;
}