Hinduism,Cosmos ,Sanatan Dharma.Ancient Hinduism science.
The earliest known reference to the knight’s tour problem dates back to the 9th century AD. In Rudraṭa’s Kavyalankara(5.15), a Sanskrit work on Poetics, the pattern of a knight’s tour on a half-board has been presented as an elaborate poetic figure (“citra-alaṅkāra”) called the “turagapadabandha” or ‘arrangement in the steps of a horse.’ The same verse in four lines of eight syllables each can be read from left to right or by following the path of the knight on tour. Since the Indic writing systems used for Sanskrit are syllabic, each syllable can be thought of as representing a square on a chess board. Rudrata’s example is as follows:
से ना ली ली ली ना ना ना ली
ली ना ना ना ना ली ली ली ली
न ली ना ली ली ले ना ली ना
ली ली ली ना ना ना ना ना ली
se nā lī lī lī nā nā lī
lī nā nā nā nā lī lī lī
na lī nā lī le nā lī nā
lī lī lī nā nā nā nā lī
For example, the first line can be read from left to right or by moving from the first square to second line, third syllable (2.3) and then to 1.5 to 2.7 to 4.8 to 3.6 to 4.4 to 3.2.
One of the first mathematicians to investigate the knight’s tour was Leonhard Euler. The first procedure for completing the Knight’s Tour was Warnsdorff’s rule, first described in 1823 by H. C. von Warnsdorff. But Indians solved 600 years before Euler.
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