Jacks or Better (Gamesys Progressive)

This is a progressive Jacks or Better game which is available at online casinos that use Gamesys software. To win the jackpot, the player must get a Royal Flush in Spades. You can find the current jackpot amount at Jackpot Graphs .

Because this game is suit-specific, the simplified deck is not as simple as it is for most games. Instead of eliminating 95% of the processing time, only 82% can be eliminated. If you run a strategy guide or analyze a paytable, please be aware that it will take up to 5 minutes to analyze the game.

Deck Simplification

Hand Scoring Code

int RoyalSuitID = 3;    // Spades

int GetHandType(int C1, int C2, int C3, int C4, int C5)
{
    int Hand = 0;

    int R1 = Rank[C1],
        R2 = Rank[C2],
        R3 = Rank[C3],
        R4 = Rank[C4],
        R5 = Rank[C5];

    int S1 = Suit[C1],
        S2 = Suit[C2],
        S3 = Suit[C3],
        S4 = Suit[C4],
        S5 = Suit[C5];

    bool Flush =

        (S1 == S2) &&
        (S2 == S3) &&
        (S3 == S4) &&
        (S4 == S5);

    if (R1 > R2) { R1 ^= R2; R2 ^= R1; R1 ^= R2; }
    if (R1 > R3) { R1 ^= R3; R3 ^= R1; R1 ^= R3; }
    if (R1 > R4) { R1 ^= R4; R4 ^= R1; R1 ^= R4; }
    if (R1 > R5) { R1 ^= R5; R5 ^= R1; R1 ^= R5; }
    if (R2 > R3) { R2 ^= R3; R3 ^= R2; R2 ^= R3; }
    if (R2 > R4) { R2 ^= R4; R4 ^= R2; R2 ^= R4; }
    if (R2 > R5) { R2 ^= R5; R5 ^= R2; R2 ^= R5; }
    if (R3 > R4) { R3 ^= R4; R4 ^= R3; R3 ^= R4; }
    if (R3 > R5) { R3 ^= R5; R5 ^= R3; R3 ^= R5; }
    if (R4 > R5) { R4 ^= R5; R5 ^= R4; R4 ^= R5; }

    if (Flush)
    {

        if (R1 == 8)
        {
            if (S1 == RoyalSuitID)
            {
                Hand = 10;      // Spade Royal Flush
            }
            else
            {
                Hand = 9;       // Royal Flush
            }
        }

        else if ((R1 == (R2 - 1)) &&
                 (R2 == (R3 - 1)) &&
                 (R3 == (R4 - 1)) &&
                ((R4 == (R5 - 1)) || ((R1 == 0) && (R5 == 12))))
        {
            Hand = 8;           // Straight Flush
        }

        else
        {
            Hand = 5;           // Flush
        }
    }

    else
    {
        if ((R2 == R3) && (R3 == R4) && ((R1 == R2) || (R4 == R5)))
        {
            Hand = 7;           // Four of a Kind
        }

        else if ((R1 == R2) && (R4 == R5) && ((R2 == R3) || (R3 == R4)))
        {
            Hand = 6;           // Full House
        }

        else if ((R1 == (R2 - 1)) &&
                 (R2 == (R3 - 1)) &&
                 (R3 == (R4 - 1)) &&
                ((R4 == (R5 - 1)) || ((R1 == 0) && (R5 == 12))))
        {
            Hand = 4;           // Straight
        }

        else if (((R1 == R2) && (R2 == R3)) ||
                 ((R2 == R3) && (R3 == R4)) ||
                 ((R3 == R4) && (R4 == R5)))
        {
            Hand = 3;           // Three of a Kind
        }

        else if (((R1 == R2) && (R3 == R4)) ||
                 ((R1 == R2) && (R4 == R5)) ||
                 ((R2 == R3) && (R4 == R5)))
        {
            Hand = 2;           // Two Pair
        }
        else if (((R1 == R2) && (R1 >= 9)) ||
                 ((R2 == R3) && (R2 >= 9)) ||
                 ((R3 == R4) && (R3 >= 9)) ||
                 ((R4 == R5) && (R4 >= 9)))
        {
            Hand = 1;           // Jacks or Better
        }
    }

    return Hand;
}