No. 1781 Nikola Petković
original - 12.11.2023
Solution: (click to show/hide)
(C+ by Popeye 4.89)
• Exchange of functions and mates on the same square (f4) of bBg3 and bRg4.
• Exchange of functions with blocks on the same square (d5) of wRd3 and wBe6.
• Exchange of functions and sacrifices on the same square (f4) of wRh4 and wQh2.
• Exchange of functions of wSb4 and wSd6.
• White/white FML moves (W3)
• Black/white FML moves (W4)
• Grimshow (B1, f4)
• Transformation of white half-battery to black pin.
• Harmonic play with an orthogonal diagonal transformation.
• Model mates.