Like most Pokmon cards, the value of Squirtle depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Team Up)
By contrast, the chess problem must be solved by brute force, and the number of steps this takes increases in proportion to an exponential function of the input
Surprisingly, Charizard doesn't have as high a price tag as some of the other most valuable Dark Pokemon in the TCG
In the early turns, Starting Town is strictly better than Vintage Cube regulars City of Brass and Mana Confluence, and you would often choose it over the other two in a late game with a dwindling life total
The final chapter turns Kumano Faces Kakkazan into Etching of Kumano, a 2/2 enchantment creature with haste that says that exiles your opponents' creatures if they die after being dealt damage by a source you control
is a non-resource based card game, therefore allowing the opponent to add more cards to their hand creates more obstacles for the player