Find a way to checkmate Black by placing pieces!
You must use as little material as you can(in points). You cannot place more pieces than allowed in a regular game of chess!
The Position
Good luck! :)
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4
I can do it with
6 points
As follows
2 knights. One knight must be at either c5 or g5, guarding the bishop and the e6 square. The other knight must check[mate] the king. So at d7 works.
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1$\begingroup$ You can prove optimality by showing a single rook clearly cannot check the king AND protect the bishop, 3 and below points trivially does not work, and 4 points does not provide enough material :) $\endgroup$ Jul 27 '19 at 2:37
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$\begingroup$ By the way the knight could go anywhere legal, not just d7. $\endgroup$ Jul 27 '19 at 17:11
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1$\begingroup$ @MakeHellTal (I like the name!) yes, I meant that d7 worked, but so do 7 other spots. $\endgroup$– SteveVJul 27 '19 at 17:25
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$\begingroup$ Thanks! Glad to see someone understanding my username. ;) $\endgroup$ Jul 27 '19 at 17:36