White:
King: Link
Queen: Zelda
Bishop#1: Ruto
Bishop#2: Saria
Knight#1: Impa
Knight#2: Nabooru
Rook#1: Rauru
Rook#2: Darunia
All Pawns: Knights of Hyrule

That's easy to figure out. Give Impa the white Royal Horse and give Nabooru Epona or the average brown horse. If you make Link a knight then give him Epona.
For the Rooks and Bishops always give them the same poses so that you know what is what.
Give the knights the pose of marching with a short spear, since a long spear would be too long and would obstruct the pieces on the board. In other words, nothing longer than the square on the board and still have the pole close to their bodies.

Black:
King: Ganondorf
Queen: Veran
Bishop#1: Komue
Bishop#2: Kotake
Knight#1: Phantom Ganon, for sure.
Knight#2: The Gerudo woman who gave Link the membership card.
Rook#1: Onyx
Rook#2: Iron Knuckle
All Pawns: Moblins

This ones a little harder to figure out, but split Twinrova up to fill in the chracters. Give the Gerudo woman a brown horse, give her and Phantom Ganon the same pose, and give Phantom Ganon the black Gerudo Steed. Make Onyx gold and the Iron Knuckle blackish silver, with Onyx holding his mace and the Knuckle holding an axe. Give the Moblins the same pose as the knights and also give them their own spears that have jagged edges with red spots on them. Also make all the higher pieces opposites, like Komue holding her broom with her left and her right arm out and Kotake holding her broom with her right and her left arm out. Also have them floating by putting flame and frost under them and have their bases be their symbols seen in the Spirit Temple battle.

Do the same with the all the pieces, have them opposites but with the same pose.
Also on the bottoms of their bases you should label them as King, Queen, bishop, knight, rook and pawn.

You're also forgetting the most important thing in the game. THAT BOARD!!!! I would use a Hyrule Castle/Ganon's tower type board. White squares are gray stone from the castle and black squares are dark gold ones, like the ones in the room where Link fights Ganondorf. Either that or black stone like what is used to make Ganon's tower.
On one side have the edge made out of Ganon's tower brick, which would be black. Along the edge have black spikes sticking up. Then in the middle have it change to white stone like Hyrule castle and white brick instead of black spikes. Then on the back edge have green tiles like Hyrule Castle.
On one side of the wall have green tiles and the other have black, but then it gets to the middle where the king and queen are have windows like Hyrule Castle and stained glass on the other side like Ganon's Tower.

Also, on the playing surface draw a Triforce in the middle of the board in special ink so that when it's put under a black light it lights up. Do the same with each character's space and draw their symbol.
Link's: The "Q" Kokiri symbol.
Zelda's: The Red Phoenix.
The Sages': Their Symbols.
The Knights': The symbol that is on the pillar of the castle in OoT.

Ganondorf's: The Eyes of Ganon symbol seen at the doorstep of Agahnim's room in LttP's Dark World.
Veran's: I think she has one.
The witches': The ones they rise out of in the OoT battle.
Phantom Ganon's: I guess you would just use a skull.
The Gerudo Woman's: The Gerudo Symbol, the one WITH the Crescent Moon and Star mind you.
Onyx's: I know he has one.
Iron Knuckle's: I guess you'd have to reuse the Crescent Star, or use a symbol that I think is on the armor.
Moblins': Hmm, tough one. Just use their faces.

*sigh* but maybe I'm just blowing it way out of proportion and thinking too hard.
BTW, your ideas weren't that cool.
L is real