No.834-837 (PH)

No.834-837 by Peter Harris – By author’s words: “Here are 4 problems using UltraPatrol:

• A long time ago (!) I learnt about the UltraPatrol condition and it took my fancy. I sent 5 problems to John Rice and he wrote an article featuring them [The Problemist September 2008]. So No.1 of the problems I have dedicated to him.
• Problem No.2 is dedicated to Erich Bartel for his collection.
• Problem No.3 is dedicated to Georgy Evseev – hoping he will try and solve it.
• No.4 is for the great man himself. The solutions have a connection. A wP comes between Q and P in each solution.”

Enjoy the collection! (JV)

Definitions:

Ultra-Patrol Chess: A piece can move, capture or give check only if it is observed by a piece of its own side.

Super-Circe: When captured, a piece is reborn on any free field on the chess board without causing self-check or selfmate. Possible is also removal of captured piece from the board. The Pawns (white, black, neutrals, half- neutrals) can be reborn on the first or eight row also. When reborn on the first row (for Black) or on the eight row (for White) the promotion is obligatory. When reborn on the first row (for White) or on the eight row (for Black) the Pawns are immovable.

Anti-Andernach: A piece (excluding King) changes its color after any non-capturing move. After capture, the piece retains its color. Rooks on a1, h1, a8 and h8 can be used for castling, provided the usual other rules for that move are satisfied. After castling, Rooks do not change color, If White makes a non-capturing move with neutral or halfneutral piece, that piece becomes black and vice versa.

Sentinels Pion Advers: When a piece (not a Pawn) moves, a Pawn of the colour of the opposite side appears on the vacated square if it is not on the first or the last rank, and if there are less than 8 Pawns of that colour on the board.

Royal Piece: Piece that executes a function of the King on the board.