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Limit to forced checkmate detection?

Is there a limit to the number of moves that a forced checkmate sequence can be, in which the analysis board can detect the forced checkmate?
Computers only look so many moves ahead. It is something known as the "horizon effect". For Stockfish, I don't know what that is, but yes, the computer won't see every forced mating pattern.
The most forced mating series of moves I have seen in my games analysed on Stockfish is 11.
I think I saw a "Mate in 58" once, but that was probably read off a tablebase rather than evaluated by the AI...
There is a nice chess rule stating that if 50 moves have been played without a capture or a pawn advance, the game is drawn. Perhaps the number of moves should go down because it is quite annoying to sit over the board with an opponent who does not want a draw, has no ability to win the position or flag me and just making some random moves waiting for me to make a stupid mistake.
Personally I think the 50 moves rule should only apply when there is either no forced checkmate or the forced checkmate does not require more than 50 moves without a capture or pawn move. I think positions that have a checkmate that requires more than 50 moves without a capture or pawn move should be made an exception to the 50 move rule provided the player knows the combination.
http://tb7.chessok.com/probe/3/61

Checkmate in 549!

If the checkmate detection in the analysis board is taken from tablebases, then the only limitation should depend only on the tablebase size (5, 6 or 7 men). Otherwise, as mentioned earlier, it should depend on the Stockfish analysis depth.

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