fmars is Fast Memory Array Redcode Simulator A specialized simulator for the game of Corewars. It's designed to be of particular use in automated redcode optimizers and evolvers. fmars borrows the idea from Martin Ankerl's qmars and pushes it to the extreme. It generates source code with special case for every possible opcode/addressing mode combination. This allows some optimizations that aren't possible in other simulators. fmars is compatible with pMARS with an exception for p-space, which is not yet implemented.