Swami Deshikan's Return to Sri Rangam

After the threat of the Muslim invaders receded, Swami Deshikan returned to Sri Rangam. After returning to Sri Rangam, Swami Deshikan reinstated the procedure of performing Adyayana Utsavam and composed the magnum opus known as Paaduka Sahasram.

Reestablishing the practice of Adyayana Utsavam:

When some of the orthodox people objected to the recital of Divya Prabandam in the temple because they included the works of Non-Brāhmaṇa Āzhwārs, written in Dravida Baasha (Tamizh), and Tiruvoimozhi in particular dealt with Kaama, which was taboo for them.

Swami Deshikan argued with them and convinced them that the holy collects were equal to the Vedas since they contained all that was in the Vedas, that since they were in praise of the Lord, the language did not matter, and that the Kaama spoken of was nothing but absolute devotion to the Lord. He re-instituted the practice of 'Adhyayana Utsavam'- the ceremonial honoring of the Āzhwārs.

Composition of Paaduka Sahasram:

Azhagiya Manavaala Naayanaar, brother of Pillai Lokachaarya and our Swami Deshikan, went to worship Lord Ranganatha. The Naayanaar was captivated by the Lord's feet and wanted to compose a Stotra praising the same. Our Swami felt that the Divya Mani Paadukaas of the Lord were equally captivating and offered to write a Stotram on the Sandals of the Lord before daybreak the next day. But he had slept almost till the wee hours of the morning of the appointed day.

When there were hardly a couple of hours to go before sunrise, the agitated disciples woke him up to remind him of his promise. Instantly, he commenced pouring out with bewildering rapidity an epic 'Paaduka Sahasram' and completed it well before daybreak. The 1,000 verses of this epic are examples of literary excellence and lofty thoughts- an incredible masterpiece of how a single subject like the Divya-Paadukai of the Lord could be expressed in so many different ways and yet hold up the audience's imagination and interest!

The Chitra Paddhati section of Swami Vedānta Desika's Pādukā Sahasram is a stunning fusion of devotional poetry and mathematical brilliance. Among its most remarkable feats is a 64-syllable Sanskrit verse (no. 929) that solves the Knight's Tour Problem, wherein a knight must visit every square on a chessboard exactly once without repeating.

Each syllable in Desika's verse corresponds to a square on the 8×8 board, and their sequence traces a valid knight's tour—crafted not merely as an intellectual exercise, but as a hymn in praise of Lord Ranganatha's divine sandals (pādukās). This composition is an early example of algorithmic thinking expressed in poetic form, blending bhakti, kāvya, and gaṇita in a way few thinkers have ever achieved.

What makes this even more extraordinary is that Desika composed this work in the 13th century, nearly four centuries before Leonhard Euler and other European mathematicians began studying the Knight's Tour in the 18th century. While Euler approached the problem through formal mathematical inquiry, Desika embedded the same solution within a lyrical, devotional framework—demonstrating that sophisticated combinatorial reasoning was already alive in India, articulated through culturally rich and spiritually meaningful expressions.

His poetic solution stands as a powerful testament to the interdisciplinary genius of pre-modern Indian scholars, where devotion, aesthetics, and logic seamlessly converged.