Evin and Jerry are playing a game with a pile of marbles. On each players' turn, they can remove $2$, $3$, $7$, or $8$
marbles. If they can’t make a move, because there's $0$ or $1$ marble left, they lose the game. Given that Evin goes first and both players play optimally, for how many values of $n$ from $1$ to $1434$ does Evin lose the game?

[i]Proposed by Evin Liang[/i]

[hide=Solution][i]Solution.[/i] $\boxed{573}$
Observe that no matter how many marbles a one of them removes, the next player can always remove marbles such
that the total number of marbles removed is $10$. Thus, when the number of marbles is a multiple of $10$, the first player loses the game. We analyse this game based on the number of marbles modulo $10$:

If the number of marbles is $0$ modulo $10$, the first player loses the game 

If the number of marbles is $2$, $3$, $7$, or $8$ modulo $10$, the first player wins the game by moving to $0$ modulo 10 

If the number of marbles is $5$ modulo $10$, the first player loses the game because every move leads to $2$, $3$, $7$, or $8$ modulo $10$

In summary, the first player loses if it is $0$ mod 5, and wins if it is $2$ or $3$ mod $5$. Now we solve the remaining cases by induction. The first player loses when it is $1$ modulo $5$ and wins when it is $4$ modulo $5$. The base case is when there is $1$ marble, where the first player loses because there is no move. When it is $4$ modulo $5$, then the first player can always remove $3$ marbles and win by the inductive hypothesis. When it is $1$ modulo $5$, every move results in $3$ or $4$ modulo $5$, which allows the other player to win by the inductive hypothesis.
Thus, Evin loses the game if n is $0$ or $1$ modulo $5$. There are $\boxed{573}$ such values of $n$ from $1$ to $1434$.[/hide]
To determine for how many values of \( n \) from \( 1 \) to \( 1434 \) Evin loses the game, we need to analyze the game based on the number of marbles modulo \( 5 \).

1. **Initial Analysis**:
   - If \( n \equiv 0 \pmod{10} \), the first player loses the game. This is because no matter how many marbles the first player removes (2, 3, 7, or 8), the second player can always remove marbles such that the total number of marbles removed is \( 10 \). Thus, the second player can always force the game back to a multiple of \( 10 \), eventually leading to the first player losing.
   - If \( n \equiv 2, 3, 7, \) or \( 8 \pmod{10} \), the first player wins the game by moving to \( n \equiv 0 \pmod{10} \).
   - If \( n \equiv 5 \pmod{10} \), the first player loses the game because every move leads to \( n \equiv 2, 3, 7, \) or \( 8 \pmod{10} \), which are winning positions for the second player.

2. **Further Analysis**:
   - If \( n \equiv 1 \pmod{5} \), the first player loses the game. This is because every move results in \( n \equiv 3 \) or \( 4 \pmod{5} \), which allows the second player to win by the inductive hypothesis.
   - If \( n \equiv 4 \pmod{5} \), the first player wins the game. This is because the first player can always remove \( 3 \) marbles and move to \( n \equiv 1 \pmod{5} \), which is a losing position for the second player.

3. **Summary**:
   - Evin loses the game if \( n \equiv 0 \) or \( 1 \pmod{5} \).
   - We need to count the number of values of \( n \) from \( 1 \) to \( 1434 \) that satisfy \( n \equiv 0 \) or \( 1 \pmod{5} \).

4. **Counting the Values**:
   - The sequence of numbers that are \( 0 \pmod{5} \) within the range \( 1 \) to \( 1434 \) is \( 5, 10, 15, \ldots, 1430 \). This is an arithmetic sequence with the first term \( a = 5 \) and common difference \( d = 5 \).
   - The number of terms in this sequence is given by:
     \[
     n = \frac{1430 - 5}{5} + 1 = 286
     \]
   - The sequence of numbers that are \( 1 \pmod{5} \) within the range \( 1 \) to \( 1434 \) is \( 1, 6, 11, \ldots, 1431 \). This is an arithmetic sequence with the first term \( a = 1 \) and common difference \( d = 5 \).
   - The number of terms in this sequence is given by:
     \[
     n = \frac{1431 - 1}{5} + 1 = 287
     \]
   - Therefore, the total number of values of \( n \) from \( 1 \) to \( 1434 \) for which Evin loses the game is:
     \[
     286 + 287 = 573
     \]

The final answer is \(\boxed{573}\)