Would a multi algo coin protect against a 51% attack better then a single algo?

[Digital Drug Lord]

I'm researching if multi algo vs 1 algo coin and was wondering if it matters if a coin has more then 1 algo would it deflect an attack

[sigtmerchant]

I'm researching if multi algo vs 1 algo coin and was wondering if it matters if a coin has more then 1 algo would it deflect an attack

If you study more about principals of 51% attack you'll realize that algo (any algo) has nothing to do with it at all.

[butka]

It could bring stability and decentralize the network, at least initially, depending on the algo. But preventing 51% attack has nothing to do with the algo. The algo has to do with decentralization and can be more or less ASIC resistant. But in the end, if enough money is involved (like in Bitcoin mining), every algorithm can be ASIC-ed. There are even attempts to incorporate as many as 16 different algorithms into one protocol, as RavenCoin did in its X16c algo:

The X16R hashing algorithm consists of 16 hashing algorithms operating in chain fashion with the ordering dependent on the last 8 bytes (16 nibbles) of the hash of the previous block.
The algorithms are as follows:
0=blake
1=bmw
2=groestl
3=jh
4=keccak
5=skein
6=luffa
7=cubehash
8=shavite
9=simd
A=echo
B=hamsi
C=fugue
D=shabal
E=whirlpool
F=sha512

Source: https://ravencoin.org/wp-content/uploads/2018/01/X16R-Whitepaper-3.pdf

[Vann]

No. The goal of multi POW algorithm coins such as Myriadcoin, Digibyte and Unitus is better decentralization of mining rewards. Since each algorithm has it's own difficulty and blocks, if one of the POW algorithms has a spike in difficulty from an increase in network hash rate, a miner can choose one of the other POW algorithms that has a lower difficulty and thus better profitability.

Since the total hash rate is spread out over different POW blocks that each have their own unique network hash rate instead of a single algorithm blockchain like a standard POW coin, theoretically a 51% attack is easier on a multi POW algo coin.