Schaeffer on his long history with Chinook and checkers:
A human playing 64 steps ahead in rollouts?
500 billion billion positions. The number of shotglasses of water in the Pacific Ocean. Around 10^20.
You can milk this for dozens of papers. You know what? I wanted to solve checkers and write one paper.
1989-2005 solving positions, up to 200 computers
250 gb worth of compressed data
The 197 year position
“Over 20 years I can’t have a single bit be wrong…” 9 years of wasted computation because of one corrupted byte.
If neither side makes a mistake, checkers ends in a draw.
Psychic “checkers is done moment.”