#29
"supercomputer"
"easily"
"one or two hours".
#31 ok, maybe that was very less, 5-6 days?
lol , after doing some little research , I discovered that in the original puzzle , the white queen is in the g4 and the black king in f8, and it's white to move, after Qc8, Kg8 is forced then we reached our position here.
Sorry for this historical inaccuracy