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Bosma chess

In 1993, Dutch chess problem composer R. Bosma noted in the FIDE-rules article 9.1, which stated:

The King is in check when the square on which it is standing is attacked by one or two enemy pieces.
Thus from this rule, it appears that a king is not in check when its square is attacked three or more times. This inspired Bosma to the following fairy chess form, called Bosma chess:
A king that is attacked three or more times is not considered to be in check.
The rule is used in some fairy chess problems; in actual games, there would be little difference with standard chess.

A problem

Henk Le Grand, the Netherlands
1st Price 151th Thematoernooi
Probleemblad 1993

K
NRNkpR
p
bPB
N


q

Bosma Chess. White to mate in two moves.

Solution

Comment

The information on Bosma chess and the problem are from the book Probleemcomponisten XIII, Henk Le Grand, Piet le Grand, a book by the Nederlandse Bond van Schaakprobleemvrienden on the two Dutch chess problem composers Henk and Piet Le Grand. It is written there:
The FIDE rules have since been adjusted.

Written by Hans Bodlaender. Web page posted by Hans Bodlaender.
WWW page created: 17 Aug 2000. Last modified on: 17 Aug 2000.