François Antoine de Legall de Kermeur (1702–92) was a French chess player.
His name is variously written Kermur, Sire de Legalle, by Twiss, and Kermur and Kermuy, Sire de Legal, by others.
I have not only had the honour of contending "on the checquer'd field" with M.
Philidor, but I have frequently played at the Cafe de la Regence with M.
de Legalle, the master of that distinguished Professor, who, in my younger days, was a better player than his celebrated pupil.
There is no man of whose person and deportment I retain a more vivid recollection than M.
de Legalle; he was a thin, pale old gentleman, who had sat in the same seat at the Cafe, and worn the same green coat for a great number of years when I first visited Paris.
While he played at chess, he took snuffs in such profusion that his chitterling frill was literally saturated with stray particles of the powder, and he was, moreover, in the habit of enlivening the company during the progress of the game, by a variety of remarks, which every body admired for their brilliancy, and which struck me perhaps the more forcibly, as I was at that time but indifferently acquainted with the French tongue.
In the book The life of Philidor, the following considerations, which can give us an idea about de Legall's strength at the chessboard are reported:
M.
de Kermur, Sire de Legal, at that time about forty years old, reigned supreme in that famous Cafe, and was undoubtedly a player of extraordinary strength; for Philidor alone was ever able to beat him, and that, too, not until he had developed his entire force by playing with Sir Abraham Janssen and the Syrian Stamma(*).
The "first player of the band" found it necessary to accept the Rook from M.
Allen refers that Legal was of the same opinion of Philidor regarding the skills of Janssen over the board.
This could indicate that, at even terms, Janssen won approximately only one fourth of the games played with Legal as he did with Philidor, but this is not completely clear from Allen's text if this interpretation is correct.
The chess encounter between Legal and Janssen happened, according to aforementioned author, after the match between Philidor and Janssen and, thus, must be collocated after 1747.
It is also very likely, as also suggested by Allen, that Legall played Stamma, since the latter lived for a certain period in Paris where he published the Essai sur le jeu des echecs in 1737.