HOW do you deliver checkmate with a king???

i hav killer king

castling is basically a king move, and if the resulting swap of positions results in the enemy king placed in checkmate, it counts as a king mate.

Ask Chess.com, not us. We didn't program it.

Except it's not. The piece that puts the king in check, for the checkmate is the piece that checkmates. The pawn is not checking the king, it's not putting the king in check, and is no immediate threat to the king.

If that pawn were a rook, and the rook were to move to d8, THEN it would be a checkmating piece. But in this case it's actually the bishop that is "delivering" the checkmate, not the pawn. Deliver is the key word. To test this and see which piece is actually checkmating all we have to do is exchange the bishop for a knight. Every other piece remains in their identical spot.

Now, if the exact same pawn moves, would it still result in checkmate? No, because the pawn is not the delivering piece, the bishop is.

Yes. The pawn is the piece that moved, not the piece that checks the king or puts it in checkmate. Which is why if the bishop were a knight, the pawn move would have different notation.

its definitely possible

not possible

possible

No need corner, just need ur king in next column/row and bring ur queen to that column/row

https://www.chessgames.com/perl/chessgame?gid=1259009

It's not possible.

Checkmate is given by the piece that is checking the king. The piece that would capture the king on the next move if it were allowed. A king cannot capture the other king. So, it's impossible.

It makes no difference HOW that checking piece came to be the checkmating piece. It could be a promotion, it could be a simple move, it could be en passant, it could be a discovered check. But in all cases, it's not the king that delivers the checkmate, it's another piece. One that could capture the king.

No. The king moved to reveal the checkmating piece. A checkmate is given by a piece that can take the king, hence the name, checkmate.

If the moved piece cannot take the king, it is not the checkmating piece.

To use your notation example, how would you put into notation a pawn that promotes to a rook and checkmates? Is it a pawn move, or is it a rook move? What if it was a bishop or knight? The notation would change, depending on what the pawn becomes, right?

It's a pawn move, right? But it's not the pawn that checkmates, is it? Only the piece that can take the king is the checkmating piece. It doesn't matter HOW that piece came to be the checkmating piece.

if castling counts as a king move

You could be right, lots of people might disagree. But I'm just going by the rules of chess. In the example given, is the pawn attacking the king, or is the bishop attacking the king? This is a quote from the USCF rulebook, I added the emphasis.

4. Objective and Scoring 
4A. Checkmate.
The objective of each of the two players in a game of chess is to win the game by checkmating the opponent’s king. 
A player’s king is CHECKMATED when the square it occupies is ATTACKED by one or more of the opponent’s pieces and 
the player has no move that escapes such attack. See also Rule 12, Check; 12C, Responding to check; and 13A,

"90% of people would disagree with he."

But

"99% of geniuses would disagree with you."

Check this score sheet from the 1800's:

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQdM0H05j4JG_KT8bN2Ku9ICyOBM29gQ_ZAEJphefjbRZ1nyL_ll12ZBVFItjGFrPqukWs&usqp=CAU

Notice how they wrote # next to a mating move. Take in point some game with a final move Kxe5#. King takes on e5 mate -> King mate! Kings can mate, though only through specific kinds of tactics involving at least some mating material such as a bishop, rook, or queen. But the move itself is still a King mate, though requiring mating materials to be on the board for it to qualify as a King mate.

Kings cannot mate. The notation just shows it was the king that moved, not the piece that gave checkmate. A few examples were already given of other pieces that moved, to deliver a discovered checkmate. Unless the moving pieces also checks (which a king cannot) then it's the discovered piece that checkmates, not the piece that moved.

I think they call it killer king or king checkmate because it's a rare and fun way to checkmate. But it's never the king that mates, that would be impossible, it's always the piece that is revealed by the king moving that checkmates.

Yes, basically you deliver checkmate, by moving your king