X went first. I'm making the assumption that
1. Both will complete your 3-in-a-line if they can (and hence win)
2. Both will play to prevent the other from getting a 3-in-the-line (and hence not lose immediately)
3. Other than that, you are allowed to play in any way.

If O went first, then by his second turn he must have obtained 2 in a row (since any 2 of the 3 O's are in a line). This means that X will need to block it (since X cannot win in the 2nd turn), thus the first 2 O's placed must be in the middle column (the order doesn't matter), and the 2nd X placed must be the top middle one. Hence, the third O placed must be in the bottom left corner, after which X will need to play in either the top right or bottom right to prevent the 3-in-a-line.

Hence, we are left with the case that X went first. We also need to verify that a sequence of moves is possible. See Aditya's comment.
–
Calvin Lin
Staff
·
4 years, 1 month ago

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It is "x's" turn.
I tried most of the moves that would lead to this and I could narrow down to one solution, where X first plays In the 1st row 2nd column, then zero is made in the centre. Next, x is made in the 2nd row 1st column and zer0 in the 3rd row 2nd column. Finally, x is played in the 1st box and the zero in the 3rd row 1st column. This might not be the perfect solution though.
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Aditya Parson
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4 years, 1 month ago

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@Aditya Parson
–
If this is a classical tic-tac-toe,I think the moves that you have suggested in your solution is a bit illogical .They are not looking for a chance to get themselves in a row of 3 same symboles.
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Jia Zheng Chai
·
4 years, 1 month ago

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@Jia Zheng Chai
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Then any two players playing rationally would never arrive at this situation. Though it is important to note that sometimes negligence can lead to this pattern. Methinks.
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Aditya Parson
·
4 years, 1 month ago

it seems 0 has made a riddle 2 win the game becuz next is of X but unfortunately X may win hence next turn is of X
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Anubhav Singh
·
4 years ago

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next turn is of X bcuz he is not a fool to loose such an easy game
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Anubhav Singh
·
4 years ago

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arent we assuming that the players dont do a one move blunder??
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Shourya Pandey
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4 years, 1 month ago

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whoever went first - it's his turn
now we have to decide who went first
if we assume that x was not dumb 0 cannot possibly go first - i tried every possible move with 0 starting first and every time got to a situation where the THIRD move of x must be to block 0's next move which is obviously not the case here so we can safely assume that x went first and it's his turn
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Snehdeep Arora
·
4 years, 1 month ago

0 in that game fist user can be enered in a squre box first so enter 0 in next
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Aba Shinde
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4 years, 1 month ago

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its X turn as it the player of X will not let the O player to get both ways to win without closing one path (diagonal or horizontal). Logically its X's turn
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Billy S.
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4 years, 1 month ago

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@Billy S.
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Well talking about logic...X gave a chance to O for wining.. :)
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Arushit Mudgal
·
4 years, 1 month ago

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Well see,game starts with X,then O and again X and so on...
At any instant of the game Number of O CAN NEVER BE MORE THAN X,here number of X and O is same so it has to be X's turn
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Soham Chanda
·
4 years, 1 month ago

calvin sir can you help us with this?
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Harsh Mohan
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4 years, 1 month ago

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think about it like this x has one position from where he can win but but 0 has two winning positions.........so if 0 had to win he would have until now......but its not.....so naturally it is 0's turn....aye?
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Harsh Mohan
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4 years, 1 month ago

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X's turn. I tried to simulate it as if O had started but if that was the case O's moves would not be logical.
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Mustafa Özçiçek
·
4 years, 1 month ago

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the person who played first
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Beakal Tiliksew
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4 years, 1 month ago

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@Beakal Tiliksew
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you have to either answer zero or cross. state your reason as well.
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Harsh Mohan
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4 years, 1 month ago

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i hv read a similar prob in a puzzle book...
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Nikhil Gupta
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4 years, 1 month ago

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its turn of player using 0 symbol
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Srijan Baranwal
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4 years, 1 month ago

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Case chase ! , I will scan and give you my solution today !
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Shivang Jindal
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4 years, 1 month ago

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actually in both the players playing have made the blunder because 1 of the two players actually had a chance to win the game but refuse to do so. So, both x and o can the next turn
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Tejas Kasetty
·
4 years, 1 month ago

I guess 0 because starting with the middle is usually the best first move in tic-tac-toe. Just based on common strategies used in this game.
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Anton Than Trong
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4 years, 1 month ago

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cross, my moves... 1st cross of second row, then zero of third row & second column, then cross of 1st row & 2nd column, then zero of middle one, then cross then zero ...so, next chance cross....too lazy to type reason
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Advitiya Brijesh
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4 years, 1 month ago

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It has to be 'x' simply because any two of the three circles force the 'x' player to respond to it, assuming both players are playing 'reasonably' and not just filling up squares randomly - thus after the circle player's second move, 'x' must respond; after the circle player's third move, the X player must respond again; looking at the board, X has only responded once by blocking a line of three; its thus his turn again

(Was wrong initially; edited)
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Gabriel Wong
·
4 years, 1 month ago

## Comments

Sort by:

TopNewestX went first. I'm making the assumption that 1. Both will complete your 3-in-a-line if they can (and hence win) 2. Both will play to prevent the other from getting a 3-in-the-line (and hence not lose immediately) 3. Other than that, you are allowed to play in any way.

If O went first, then by his second turn he must have obtained 2 in a row (since any 2 of the 3 O's are in a line). This means that X will need to block it (since X cannot win in the 2nd turn), thus the first 2 O's placed must be in the middle column (the order doesn't matter), and the 2nd X placed must be the top middle one. Hence, the third O placed must be in the bottom left corner, after which X will need to play in either the top right or bottom right to prevent the 3-in-a-line.

Hence, we are left with the case that X went first. We also need to verify that a sequence of moves is possible. See Aditya's comment. – Calvin Lin Staff · 4 years, 1 month ago

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It is "x's" turn. I tried most of the moves that would lead to this and I could narrow down to one solution, where X first plays In the 1st row 2nd column, then zero is made in the centre. Next, x is made in the 2nd row 1st column and zer0 in the 3rd row 2nd column. Finally, x is played in the 1st box and the zero in the 3rd row 1st column. This might not be the perfect solution though. – Aditya Parson · 4 years, 1 month ago

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– Jia Zheng Chai · 4 years, 1 month ago

If this is a classical tic-tac-toe,I think the moves that you have suggested in your solution is a bit illogical .They are not looking for a chance to get themselves in a row of 3 same symboles.Log in to reply

– Aditya Parson · 4 years, 1 month ago

Then any two players playing rationally would never arrive at this situation. Though it is important to note that sometimes negligence can lead to this pattern. Methinks.Log in to reply

– Jia Zheng Chai · 4 years, 1 month ago

Ok,got it.Log in to reply

X – Anubhav Singh · 4 years, 1 month ago

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it seems 0 has made a riddle 2 win the game becuz next is of X but unfortunately X may win hence next turn is of X – Anubhav Singh · 4 years ago

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next turn is of X bcuz he is not a fool to loose such an easy game – Anubhav Singh · 4 years ago

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arent we assuming that the players dont do a one move blunder?? – Shourya Pandey · 4 years, 1 month ago

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whoever went first - it's his turn now we have to decide who went first if we assume that x was not dumb 0 cannot possibly go first - i tried every possible move with 0 starting first and every time got to a situation where the THIRD move of x must be to block 0's next move which is obviously not the case here so we can safely assume that x went first and it's his turn – Snehdeep Arora · 4 years, 1 month ago

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its x's turn – Ashish Kumar Singh · 4 years, 1 month ago

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0 in that game fist user can be enered in a squre box first so enter 0 in next – Aba Shinde · 4 years, 1 month ago

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its X turn as it the player of X will not let the O player to get both ways to win without closing one path (diagonal or horizontal). Logically its X's turn – Billy S. · 4 years, 1 month ago

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– Arushit Mudgal · 4 years, 1 month ago

Well talking about logic...X gave a chance to O for wining.. :)Log in to reply

Well see,game starts with X,then O and again X and so on... At any instant of the game Number of O CAN NEVER BE MORE THAN X,here number of X and O is same so it has to be X's turn – Soham Chanda · 4 years, 1 month ago

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– Sanjay Ambadi · 4 years, 1 month ago

Dude, 'x' need not be first.Log in to reply

– Soham Chanda · 4 years, 1 month ago

yes..the game stars with X..Log in to reply

of 0 one – Vaibhav Singhal · 4 years, 1 month ago

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calvin sir can you help us with this? – Harsh Mohan · 4 years, 1 month ago

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think about it like this x has one position from where he can win but but 0 has two winning positions.........so if 0 had to win he would have until now......but its not.....so naturally it is 0's turn....aye? – Harsh Mohan · 4 years, 1 month ago

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X's turn. I tried to simulate it as if O had started but if that was the case O's moves would not be logical. – Mustafa Özçiçek · 4 years, 1 month ago

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the person who played first – Beakal Tiliksew · 4 years, 1 month ago

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– Harsh Mohan · 4 years, 1 month ago

you have to either answer zero or cross. state your reason as well.Log in to reply

i hv read a similar prob in a puzzle book... – Nikhil Gupta · 4 years, 1 month ago

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its turn of player using 0 symbol – Srijan Baranwal · 4 years, 1 month ago

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Case chase ! , I will scan and give you my solution today ! – Shivang Jindal · 4 years, 1 month ago

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actually in both the players playing have made the blunder because 1 of the two players actually had a chance to win the game but refuse to do so. So, both x and o can the next turn – Tejas Kasetty · 4 years, 1 month ago

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– Tejas Kasetty · 4 years, 1 month ago

They refused to do so in the previous stepsLog in to reply

– Maddy B · 4 years, 1 month ago

I agree. Got the same answer.Log in to reply

I guess 0 because starting with the middle is usually the best first move in tic-tac-toe. Just based on common strategies used in this game. – Anton Than Trong · 4 years, 1 month ago

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cross, my moves... 1st cross of second row, then zero of third row & second column, then cross of 1st row & 2nd column, then zero of middle one, then cross then zero ...so, next chance cross....too lazy to type reason – Advitiya Brijesh · 4 years, 1 month ago

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It has to be 'x' simply because any two of the three circles force the 'x' player to respond to it, assuming both players are playing 'reasonably' and not just filling up squares randomly - thus after the circle player's second move, 'x' must respond; after the circle player's third move, the X player must respond again; looking at the board, X has only responded once by blocking a line of three; its thus his turn again

(Was wrong initially; edited) – Gabriel Wong · 4 years, 1 month ago

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– Aditya Parson · 4 years, 1 month ago

What if it is the opposite way round??Log in to reply

x as usually x starts and they have 3 turns each – Yash Khandelwal · 4 years, 1 month ago

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