There is a black queen on the chess board. How many white queens (or how many knights) are needed to take it? No other pieces present, white to move, the black queen is not under attack yet.
Discussion at:
http://lesswrong.com/r/discussion/lw/pa0/open_thread_july_24_july_30_2017/dvo9
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Let’s start with obvious win, 7 queens and move Qg6-g7
https://lichess.org/editor/7q/1Q1Q1Q2/6Q1/6Q1/8/6Q1/8/6Q1_w_-_-
This is a good start. Two questions remain. Is it possible to do it with fewer queens and how to force a centralized black queen into this submissive position?
Let’s just continue with 6 queens and move Qf7-h7
https://lichess.org/editor/7q/Q1Q1QQ2/8/8/6Q1/8/6Q1/8_w_-_-
Nicely put, With thanks.
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