No.981 by Krassimir Gandev – A combination of two series surprisingly ended with a New Year tree. (JV)

Definitions:

n→Ser-s=N: Black makes n serial moves and than goes Ser-s=N.

Berolina Super Pawn(BS): It is Berolina-Pawn but its moves and captures are respectively extended to the entire diagonal and the entire column.

Berolina-Pawn(BP): Walk and capture are swapped relative to the orthodox Pawn. The Berolina-Pawn moves without capturing diagonally (possibly two squares if it is on the second row of its side) and captures vertically.

Super Pawn(SP): Moves straight forwards and captures diagonally forwards through as many empty squares as desired. Promotion is normal.