Go back to the tent at right side of the cave. Be sure that you already played a dice game and note that the dice are loaded.

Stand by the box at right. Wait until the gambling captain wins and places his winning in his pocket; then immediately take the loaded official dice from the box.

Unload the loaded the dice: Exit the tent.

Right click the dice in inventory. Feodor sees metal in the dice.

Place the dice in the bellows on the ground in front of the cooking pot. The opening is too big.

Insert Juan's smoking pipe on the bellows. Use the loaded dice in the bellows. Automatically Feodor uses the bellows and the metals on the dice are sucked out.

Go back to the tent. Place the unloaded dice back in the box.

Play the game: Talk to the captain. Ask to change sides and then risk a game.

The captain took the unloaded dice from the box.

Play the game. Use the cup at bottom right. Keep any skulls you throw. Eventually win the game.

Talk to the captain. He agrees to support Feodor because the captain is an honest man.