Trimagic 12x12-Squares  
Walter Trump
TXT-list of all mentioned trimagic squares

2002-06-08
1a
First known trimagic square of order 12
The square was first published in the local newspaper 'Schwabacher Tagblatt'.
2003-03
1b
Second known trimagic 12x12-square derived from 1a by permutations of rows and columns
Found by Pan Fengchu and Gao Zhiyuan, China
2018-01-28
2
A present for the 60th anniversary of LEGO, with 60 ... 28 1 19 58 in the first row.
Additionally several aspects of the square have bimagic semi diagonals.
2018-02-05
3a-d
Existence of non-symmetric trimagic squares of order 12
Certain axially symmetric squares can be transformed into squares which are not symmetric.
2018-02-06
4a-b
Nearly equal trimagic squares of order 12
There are essentially different trimagic squares where only 8 digits are different.
2018-02-10
5a-c
From a semi-trimagic square of order 12 with 3 pairs of possible diagonals
we can derive three essentially different trimagic squares.
2018-02-18
6a-d
From a semi-trimagic square of order 12 with two specially arranged pairs of possible diagonals
we can obtain two axially symmetric and two non-symmetric trimagic squares.

Walter Trump, Nürnberg, Germany, ms(at)trump.de, © 2018-01-28 (last modified: 2018-02-19)