He has introduced a new fairy condition, the KoBul kings. A KoBul king moves and captures like the most recent friendly piece that was captured. It becomes again a normal king when a friendly pawn is captured.
It is a condition with very interesting strategic and tactical implications. The solving software, (example : WinChloe), recognizes the new condition.
A formal composing tourney is announced, see http://kobulchess.com/en/tournaments/anouncements/29-kobulchesscom-tt.html .
I am presenting here two original KoBul compositions, very very simple, with their solutions.
h#2, 2 solutions
1.Qa5 Qxa5(bK=QK) 2.QKf4 Qxf5(bK=K)#
1.Qh4+ Kxh4(bK=QK) 2.QKf4+ Qxg3(bK=K)#
8/2pS1K2/8/2pr4/1P6/3SP3/8/6k1 w (5+4)
h#3, 2 solutions
1.Re5 S3xe5(bK=RK) 2.RKd1 e4 3.RKd6 bxc5(bK=K)#
1.Rd4 exd4(bK=RK) 2.RKg5 Sf4 3.RKf5+ Kg6#