Can you name all special chess notation cases?
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I am not sure it is the longest algebraic notation but I know a special case with 6 characters. for example, if we got a board with black having a King on a8 and a Knight on e8 and white having a Queen on h7 and a Pawn on f7, white could promote the pawn to a Rook by taking the knight on e8 and mate his/her opponent. this would be notated as fxe8R# I think
IcyAvaleigh hat geschrieben:
I am not sure it is the longest algebraic notation but I know a special case with 6 characters. for example, if we got a board with black having a King on a8 and a Knight on e8 and white having a Queen on h7 and a Pawn on f7, white could promote the pawn to a Rook by taking the knight on e8 and mate his/her opponent. this would be notated as fxe8R# I think
Thanks for sharing.
Even longer on chess.com since they use "="
I bet it would be possible to checkmate with a queenside castle, which would be six characters
O-O-O#
If multiple pawns could take than you could say f7×e8=Q#.
No it would just be fxe8Q# or fxe8=Q# depending on which notation you prefer. In this case the file alone is enough to specify which pawn is capturing.
Here’s an idea (sorry I don’t know how to add chess boards)
White king on a1
Black king on c5
White queens on e4, e6, g4, g6
White knight on a5
Black knight on f5
If a queen moves to f5, capturing the knight and checkmating the king, both the column AND row are needed to specify which queen moves there. For instance, if the g6 queen moves to f5, it would be denoted by Qg6xf5#
That’s the only way I can think of to get seven characters.
f×e8=N++
SuperSam1 wrote:
f×e8=N++
Yeaaa 
If it'z valid.. lOOks gud ta' me.. But I dOn't knOw 
Not checkmate, king can move to b8. And anyway I can tie you with Qg6xf5++
Besides, does FIDE use an equals sign for promotions? I’m pretty sure they don’t
Put a rook on h1 and it’s gxf6e.p.++
Aug 7, 2018
0
#15
++ is not commonly used for mate I think, but ok.
Here's another position
@preggo See post #8
++ is double check.
It’s basically the same idea, but with queens
Aug 7, 2018
0
#19
trollbagley43 wrote:
@preggo See post #8
Oh, I see.
Guy in #4 got 7 characters too though.
Usually chess moves in algebraic notation are either 2 characters long (for most pawn moves) or 3 characters long (if anything but a pawn is moved).
e4 = 2 characters long
Ke4 = 3 characters long.
However there are cases where the moves are way longer than that. Take the following example: