Logic Masters Deutschland e.V.

Normal 8x8 sudoku rules apply. Place 1 of each digit, 1-8, into each row, column, and box.

Digits on an arrow must sum to the digit on that arrow's circle. (The long arrow starting in R1C3 branches at the end, representing two 5-digit arrows, not one large 6-digit arrow combined.)

If a digit is on the cell of a major chess piece (rook, knight, queen, king, bishop), then all cells containing that same digit cannot be allowed to attack another of the same digit according to that chess piece's rules. (If a digit is on 2 major chess pieces then it must follow both pieces' restrictions.) This means that digits under a queen or bishop restriction cannot see each other diagonally, digits under a king restriction cannot be diagonally adjacent to the same digit, and digits under a knight restriction cannot move 2 squares horizontal and 1 square vertical, or 2 squares vertical and 1 square horizontal, to see the same digit.

If a digit is on the cell of a pawn, then that particular cell cannot be allowed to attack another of the same digit, one space diagonally in the direction it is facing. White pawns face upwards, and black pawns face downwards. In this case, the restriction is not applied to all cells containing that digit.

f-puzzles: https://f-puzzles.com/?id=ylf6wlaz

CTC: https://sudokupad.app/7tcrml18ar