copied from http://sky116688.tripod.com/pitch/rules.html
and then editted
Rules for Pitch
The game of Pitch can be played with either 3 players or 4 players.
In the 4 player game the individuals sitting across from one another are
partners and scored as a team.
Start of the game
The game starts by selecting a dealer and the dealer deals six cards to
each player.
The Bidding Process
Once all the players have been dealt six cards, the player to the left
of the dealer will make a bid. The valid bids are Pass, 2, 3, or 4. After
the first player makes a bid, each player to his left (moving clockwise)
will make a bid in order. Once a player bids either 2, 3, or 4, the next
player must bid higher than the current bid (except for the dealer). The
last person to bid is the dealer. The dealer may submit a bid at the current
bid level. In this case the dealer would win the bid. For example
if the highest bid were 3, the dealer could also bid 3 and win the bid.
If all the players have passed on their bids, the dealer may not submit
a pass bid. The player that bids the highest will win the bid with the
exception of the dealer, who may win the bid by bidding the same as the
current highest bid.
Selecting the trump
Once the winning bidder is established, that person will need to select
a suit that will be trump for this game. The trump suit is a suit that
will have the highest priority over all other suits for that game. The
trump suit is actually determined by the first card the winning bidder
throws.
Playing the trick
A Pitch game is made up of six tricks. During each trick every player selects
one card to play in order starting from the trick leader. After the bid
process the trick leader is the winning bidder. After the first trick,
the trick leader is whoever won the previous trick. The player that wins
the trick will gain procession of all the cards thrown for that trick and
the cards are keep face down except for the first card of the first trick
(this represents the trump suit for the game).
Winning the trick
The lead suit for a trick is the suit of the first card that is thrown.
The trick is won by the person throwing the highest value lead suit, unless
a trump suit was thrown. If a trump suit was thrown, then the person throwing
the highest trump suit value will be the winner of the trick. The value
of the cards are 2 being the lowest and Ace being the highest.
Valid cards to throw during a trick
The trick leader (person throwing the first card) may throw any card in
his hand. After that, players have certain restrictions on the cards they
may throw. If the first card thrown is a trump suit, each player must throw
a trump suit card if they have one, otherwise they may throw any other
card. If the first trick card thrown is a not a trump suit card, then each
player may throw a trump suit card or a card that matches the lead suit
of the first card thrown. If a player has no cards in the lead suit, he
may throw any card. A player may throw a trump card at any time.
Ending the trick
When all the six tricks have been played, that game ends and the score
for that game is tabulated.
Scoring a Pitch game
There are 4 points that are possible to be awarded for each pitch game.
The points are calculated from the cards won by each player during the
six tricks played during the game.
One point is awarded to the person that has won the highest
trump card.
One point is awarded to the person that has won the lowest trump card.
One point is awarded to the person that has won the Jack trump card.
One point is awarded to the person that has won the most high-card
points.
High-card points are calculated as follows.
An Ace is worth 4 high-card points.
A King is worth 3 high-card points.
A Queen is worth 2 high-card points.
A Jack is worth 1 high-card points.
A Ten is worth 0 high-card points.
There are always 2 points awarded for each game (high trump and low trump).
The point for Jack of trump may not be awarded if no one has won that card.
Also, if there is a tie for high-card points, that point is not awarded.
The players (or team) that did not win the bid are automatically assigned
the points that they won during the game. The winning bidder (or team)
must have won enough points during the game to either equal or exceed their
original bid to be credited with the points for that game. If the winning
bidder (or team) does not win his bid, points are deducted in the amount
equal to the original bid. In the 4 player game, the players cards are
combined for each team and calculated accordingly.
A Pitch round
After the pitch game is scored, the person to the left of the dealer of
the last game becomes the new dealer. A new game is dealt. A pitch round
is won when a player or team reaches 15 or more points and was the winning
bidder and won their bid. If the team or player that reaches 15 or more
points was not the winning bidder, the team with the most points (15 and
greater) will win the round. In this case, if there is a tie when a player
or team reaches 15 or more points the round continues with a new game until
a clear winner is established.