for 9, it's not that hard to explain
Let's say white has a light squared bishop and rook.
Then white's strategy is to move the king to h8, stick the bishop on h7, and stick the rook on g8
(If the bishop is dark squared, move the king to a8, stick the bishop on a7, and stick the rook on b8)
If i dont win this i will be disappointed bc im 2200 in atomic.
1. to explode or checkmate the enemy king (though checkmates are rare)
2. All PIECES in the surrounding squares explode, as well as the piece that captured. (pawns only explode when being taken or taking)
3. Yes, the 2 move checkmate like in regular chess
4. 1
5. There is some debate against this, but usually Nf3 is considered the best move. (With Nh3 in second)
6. f6
7. It depends. Beginning: knight Middle game: bishop Endgame: Usually knight because if you need to push a pawn with the enemy king stopping it, you can check it to move, but bishops can only check on certain squares. I would say generally the knight since many games never make it out of the beginning.
, 8. Ne5 and Ng5, namely Ne5 because that threatens both f7 and d7, which would explode the enemy king. (wow these questions are obsessed with the first move)
9. No. It is actually a win for the Rook and bishop. It is very hard to explain, but i could play you to show you.
10. e3
9/10
question 4 you said 1 and the explosion radius is 9 because it is the center of the explosion plus the surrounding squares
Nice try! you got a good score.
and also, yes! I know that Rook, King and Bishop Vs, King is a win (you make the enemy king follow your king to the corner and then block the squares adjacent with the rook and bishop, then keep trapping the king with the rook and go to a square where the king has only 2 squares. And finally... welp here is an example:
imagine the queens are kings because normally in that is impossible to put king adjacent
Um do you know what a radius is?
The radius is clearly one square
this is what I mean
If i dont win this i will be disappointed bc im 2200 in atomic.
1. to explode or checkmate the enemy king (though checkmates are rare)
2. All PIECES in the surrounding squares explode, as well as the piece that captured. (pawns only explode when being taken or taking)
3. Yes, the 2 move checkmate like in regular chess
4. 1
5. There is some debate against this, but usually Nf3 is considered the best move. (With Nh3 in second)
6. f6
7. It depends. Beginning: knight Middle game: bishop Endgame: Usually knight because if you need to push a pawn with the enemy king stopping it, you can check it to move, but bishops can only check on certain squares. I would say generally the knight since many games never make it out of the beginning.
, 8. Ne5 and Ng5, namely Ne5 because that threatens both f7 and d7, which would explode the enemy king. (wow these questions are obsessed with the first move)
9. No. It is actually a win for the Rook and bishop. It is very hard to explain, but i could play you to show you.
10. e3
9/10
question 4 you said 1 and the explosion radius is 9 because it is the center of the explosion plus the surrounding squares
Nice try! you got a good score.
radius is 1.5
I'm answering only the questions where I feel I can add something more than TheFluffyKoala did.
5. 1. Nf3, 1. Nh3, and 1. e3 are all considered to be winning from a theoretical point of view currently. 1. Nf3 is currently considered strongest theoretically, but 1. Nh3 may be the best move practically. It's very hard to say which is the best of these three moves though.
6. 1... f6 is black's only try to argue a theoretical draw after 1. Nf3. 1... h6, is black's best try after 1. Nh3, and 1... e6 is black's best response to 1. e3, although 1... Nf6 can be a little tricky as well if the player knows what he/she is doing.
7. This is very hard to say, and it entirely depends on the type of position. Bishops can get pawnitized, while knights can't. In an ending where both kings are blocking pawns and one side has a bishop blockading a pawn, the bishop can triangulate to gain some extra tempo while the pawn advances. Knights can't. Stockfish gives bishops a higher value than knights currently, but it's not uncommon to see a knight that has entered into the opponent's position that is worth more than a rook. This is much less common for bishops as they generally have a harder time entering the opponent's position early on. In general I like to think of it as bishops being very slightly better in most of the game, but with far less dynamic potential than a knight.
8. 1. Nf3 threatens 2. Ng5 and 2. Ne5. 1. Nh3 threatens 2. Ng5. 1. e3 threatens 2. Qh5.
9. The side with rook and bishop can force a mate. If you want to know more about pawnless atomic endgames and their best results you can look here: http://nicklong.net/chess/lite/atomic/mates.htm
Also there is no explosion radius because it's not a circle and is instead a square, meaning it doesn't have a radius 
.
interesting about. the pawnless endgames.
after 1 e3, i was checking the database and it looked like 1...f5 has decent results. is that a bad mode?
It's bad but people suck so people get away with it.
You weren't asked what the radius IS but how many squares are IN it, and the answer is 9.
1. What is the goal? To blow up your opponent's king or check your opponent where he can't escape.
2. What happens when you capture? The piece that captures, the piece that is captured, and anything surrounding the square other than pawns "blow up".
3. Can you win in 2 moves? Fools mate would still be checkmate thus 1 g4 e3 2 f4 Qh5. So yes.
4. How many squares is an explosion radius? 9 squares (though the radius is 1)
5. What is the first best move for white? e3 and Nf3 are both good first moves, and so is Nh3. Nf3 is most commonly the first played move.
6. What is the forcing response of black against white's best first move? If white plays Nf3 you normally respond f6 but there are some other responses that doesn't instantly lose.
7. Which is better, knight or bishop? Knight
8. What is white threatening after the best first move? After Nf3 the main threat is to go to e5 and forking the pawns on d7 and f7. Going to g5 works too if the pawn is still on f7, and even if the player now moves that pawn Nf7 may trap the queen next to the king.
9. When 2 kings are adjacent and one team has Rook and Bishop, is that an ABSOLUTE draw? Normally you want your opponent to have another piece that you can capture if the king moves next to it, but if you can get your king into the corner, rook in one square next to it and bishop in the other and your opponent must leave the diagonal square you will win.
10. With the forcing 1st move of black after white's best move, Which is the best 2nd move for white? After Nf3 f6, e3 is normally recommended.
Y'all already know how this works if you saw the first part so if you don't know yet look at notes and there you will find the link I posted so here we go with Atomic
1. What is the goal?
2. What happens when you capture?
3. Can you win in 2 moves?
4. How many squares is an explosion radius?
5. What is the first best move for white?
6. What is the forcing response of black against white's best first move?
7. Which is better, knight or bishop?
8. What is white threatening after the best first move?
9. When 2 kings are adjacent and one team has Rook and Bishop, is that an ABSOLUTE draw?
10. With the forcing 1st move of black after white's best move, Which is the best 2nd move for white?
Winner gets 1 trophie because this one was easier.