seirawan chess on musketeer chess website

Hi, 

are you interested in having seirawan chess online?

What are the rules for Seirawan Chess?

I would like to see Progressive (Scottish) Chess online and also Giveaway (Losing) Chess.

Reb Orrell

How much is the Elephant and Hawk worth on 8x8 board?

This has been quite precisely measured:

Q=9.5, E=C=9.0, H=A=8.75.

Differences in the late end-game are that where KQKR is a general win, KAKR is a general draw, and KCKR a boundary case: it is a draw when the Rook can prevent the attacking King from crossing into the same half of the board as the defending one. Also, where Q+minor vs. Q is a draw, Q+minor vs C or A is generally a win.

What causes the larger than usual synergy bonus for Archbishop/Hawk?

 This is unknown. I was able to rule out the most likely explanations by trying their effect in other cases. E.g. the Knight moves lifts the color binding of the Bishop. (But this is also true in the B+R=Q case, and a color-changing step added to a Bishop doesn't increase its value more than adding the same step to a Knight.) Or mating potential, which neither B nor N had, but A does. (But adding an extra capture that provides mating potential to a Bishop doesn't add significantly more value than adding a capture that doesn't.)

My currently favored hypothesis (for lack of testing to falsify it...) is that attacking orthogonally adjacent squares is worth a bonus. By combining B + N you create 16 such pairs, while combining R+N or R+B only creates 8. And it would also help to explain why a Rook is worth more than a Bishop even on a cylinder board (where they have equal an equal number of moves).

Elephant is not able to castle, is this a bug?

E.g  1. e4 2. Nf3 3. Be2 4. h4 5. Rh3 E@h1 6. 0-0

What if black captures the rook first then the player place the elephant on h1?

I guess that ain't possible right.

Ok.