To determine the number of chests in the Chaos Shrine in Final Fantasy 1, let’s analyze the available information step by step:

1. Initial Confusion:
– There is some confusion regarding the number of chests in the Chaos Shrine. Some suggest 6 chests, while others mention 13.

2. Correcting Misinformation:
– The most accurate information indicates that there are indeed 6 chests in the Chaos Shrine.

3. Additional Context:
– There is a general guide for the game but it does not specifically mention the number of chests in the Chaos Shrine.

4. Visual Confirmation:
– A visual walkthrough provides information, but it does not specifically highlight the number of chests in the Chaos Shrine.

5. Treasure Chest Locations:
– A detailed map of the Chaos Shrine indicates that there are 6 chests, but it does not provide a detailed list of their locations.

Conclusion:
Based on the most reliable source, there are 6 chests in the Chaos Shrine in Final Fantasy 1.

Step-by-Step Instructions to Access the Chaos Shrine:
1. Ensure You Have the Four Crystals:
– Make sure you have collected all four crystals (Fire, Ice, Earth, and Water) as they are required to proceed through the game’s story, including accessing the Chaos Shrine.

2. Proceed to the Chaos Shrine:
– Once you have the four crystals, you can proceed to the Chaos Shrine. However, you must first talk to the Black Orb, which requires you to have defeated the Four Fiends and lit their respective orbs.

3. Accessing the Black Orb:
– To access the Black Orb, you need to talk to it directly after defeating the Four Fiends and lighting their orbs. You do not need to speak with the sages at Crescent Lake for this specific task.

4. Exploring the Shrine:
– After accessing the Black Orb, you can explore the Chaos Shrine and find the 6 treasure chests. The exact locations of these chests can be found on detailed maps.

By following these steps and ensuring you have the correct information, you should be able to access and explore the Chaos Shrine in Final Fantasy 1, including finding all 6 treasure chests.