No. 185, October 2000
10914 - Andrei Frolkin & Andrei Kornilov
Die Schwalbe Heft 185, Oct. 2000
9+12. Release the position
12+14. Add a white bishop and release the position
0+0+13. Colour the pieces so a #6 is possible for one of the sides.
11+15. Proof game in 10.5 moves
16+12. Proof game in 17.5 moves
16+13. Proof game in 21.5 moves
13+14. Find a move order with 31 directly consecutive checks.
6+1. Add as economically as possible pieces, so a #1 is possible. (Monochromatic chess)
In a legal position, a black piece Y, which isn't attacked, and which
doesn't attack any white piece, makes a move. After that, it can be
captured by X white pieces.
What is the maximal value of X, when promoted pieces are
With which pieces Y is this possible?
8+10. Proof game in 15.5 moves
12+15. Proof game in 18.0 moves