White to move...
Bulldog Chess - Cat & Mouse - Fly-Eagles-Fly vs captaintugwash

Me too, and I'm glad you do too. The cat was less active than I hoped in our previous game, let's hope this one is different in that regard.
1... e6

Obviously that's not a blunder, but I wonder if on a slightly wider board the bishop is worth slightly more than the knight. Also it allows me to develop the mouse easily.
5... hxg6
Rules - same as classic chess, with the following exceptions...
Mouse - moves like a rook, can only capture the enemy mouse, and only then if it's on an adjacent square, ie captures like a king.
The mouse "scares" enemy pieces next to it, with the exception of the cat and mouse.
A piece that is "scared" (ie next to an enemy mouse) cannot capture, and cannot deliver check. It can move but only to a vacant square (eek a mouse, run away!).
Circles represent capture squares, arrows represent squares the mouse can move to.
Cat - moves by jumping two squares or like a knight.
Captures like a king. The cat can capture any enemy piece, and can deliver check. The cat is not afraid of the mouse, and as such is unaffected being next to it.
The cat cannot capture when jumping, and cannot move to a vacant adjacent square.
The cat has been tweaked to allow it to move like a knight as well as jump two, this is to allow it to be more active (it was previously restricted to one colour when jumping, and even then only half of the available squares of that colour, ie one quarter of the board).
Circles represent capture squares, arrows represent jump squares.
Castling - same, except king moves three whichever way it goes. King cannot move through check, but a "scared" piece cannot deliver check, and therefore cannot stop castling (unless it's directly in the way).
En passant - same as classic chess.
Promotion - pawns can promote to cat or mouse if desired.
@Fly-Eagles-Fly
You're white this time, good luck.