September 4th

Gerardus Hendrik Goethart (04-09-1892 - 17-05-1969) Dutch composer

Gerardus Goethart
[chessnc.com]

Gerardus Goethart was mostly a twomover composer.
24 of his problems were compiled by Max Niemeijer in "Chess Problems of G.H. Goethart" (1962).
He left his name to the following theme, also called "Goethart unpin": White unpins a black piece, taking advantage of an interference of this pinned black piece by another black unit.

Here is a good training for the twomover round of the coming WCSC:

Goethart, Gerardus Hendrik
Hampshire Telegraph and Post, 1915
1^st Prize

#2

9 + 10

Show Solution

1.Rb4! ZZ
and Black cannot avoid the mate on the 2nd move.

Goethart, Gerardus Hendrik
The Problemist, 1952
4^th Prize

#2

6 + 6

Show Solution

1.Qa6! (2.Rb5#)

1...Kc5+ 2.Rb2#
1...Bc4~ 2.Rb4# or 1...Bb5 2.Rc6#
1...Rxa6 2.Rxa6#
1...Rc5 2.Qxa1#

The good key gives a flight and sacrifices the white Queen. Black correction (with the black Bishop).

Goethart, Gerardus Hendrik
Hampshire Telegraph and Post, 1916
3^rd Prize

#2*

8 + 8

Show Solution

Set play:
1...Rc3+[a] 2.Bc3#[A]
1...Rc4+[b] 2.Sc6#[B]
1.Sc5! (2.Se6#)
1...Rc3[a] 2.Be3#[C]
1...Rc4[b] 2.Sxd3#[D]
1...Kxc5 2.Qxa7#
1...Bxc5 2.Qg4#
Changed mates, battery play.