well it just seems to be the hardest
Hardest Mate

Bishop + Knight is (probably!) the hardest basic mate because it's a lot harder to visualize all of the squares controlled by your various pieces. Plus, you both have to drive your opponent's King to the edge of the board, then (if he plays it right!) you must force him to the opposite corner, which has the same color as your Bishop. It's a long and difficult process.
Two Bishops is easier because if you keep them on adjacent diagonals, you know you have an impenetrable wall. The only tricky part with that is to be sure to use waiting moves properly to avoid stalemates.

Bishop + Knight is (probably!) the hardest basic mate because it's a lot harder to visualize all of the squares controlled by your various pieces. Plus, you both have to drive your opponent's King to the edge of the board, then (if he plays it right!) you must force him to the opposite corner, which has the same color as your Bishop. It's a long and difficult process.
Two Bishops is easier because if you keep them on adjacent diagonals, you know you have an impenetrable wall. The only tricky part with that is to be sure to use waiting moves properly to avoid stalemates.
your right!

Also, K vs K+ R is a piece of cake. All you need to do is keep cutting the enemy K off from the file/rank, and make waiting moves to achieve the opposition to push him back. Mating with BB or BN is much harder.
theres also a smothered mate-
B+N vs K is clearly the hardest 'basic' mate - basic being where the side being mated has no material.
Obviously there are harder mates when the other side has material; this thread has already thrown up 500+ move mates and the 2N+P mate.
B+B vs K is much harder to get with 'common sense' than B+N... like someone else said, the bishops just form a barrier and you can pin the king to the side and eventually mate him just by trial and error really.
I've never had to try and force B+N mate before, thankfully, although I came mighty close in one game where my opponent should have sacrificed his rook for my advanced pawn to leave me with B+N, but he blundered and let me fork his rook, so I still had the pawn. That was a *phew* moment!
K+R technique is easy; where a tablebase will take 15 moves, I'll normally do it in 16 or so, sometimes perfectly.

B+N vs K is clearly the hardest 'basic' mate - basic being where the side being mated has no material.
Obviously there are harder mates when the other side has material; this thread has already thrown up 500+ move mates and the 2N+P mate.
B+B vs K is much harder to get with 'common sense' than B+N... like someone else said, the bishops just form a barrier and you can pin the king to the side and eventually mate him just by trial and error really.
I've never had to try and force B+N mate before, thankfully, although I came mighty close in one game where my opponent should have sacrificed his rook for my advanced pawn to leave me with B+N, but he blundered and let me fork his rook, so I still had the pawn. That was a *phew* moment!
K+R technique is easy; where a tablebase will take 15 moves, I'll normally do it in 16 or so, sometimes perfectly.
well i bet it K + N is the hardest but it Rook + King there can be a lot of back and forth moves

Just have white play 3. Kf5 or something followed by Kg6 and Rf7# there.
No offense, but K+R vs. K is almost trivially easy.
If you read the thread, how can anyone say it is?