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# Comments/Ratings for a Single Item

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Hybrids. Standard pieces combine and split. (8x8, Cells: 64)
Greg Strong wrote on 2005-05-18 UTC
Iteresting. What does it mean that equal pieces can form a hybrid? Can a piece be a hybrid of more than two components?

Artem Shvorin wrote on 2005-05-18 UTC
```> What does it mean that equal pieces can form a hybrid?
It is possible to couple (for example) a pair of rooks. If there are rooks
on a1 and a2 it is possible to move one rook from a1 to a2 (I suggest the
following notation: Ra1^a2, or breafly R^a2, marking any 'hybridizing'
by '^' symbol).  As a result a hybrid Rook+Rook appears (designated by
'RR' symbol).  The worth of such homogeneous hybrids is dubious, though
it may be useful to bring a couple of slow units (knights or guards)
across the board; also this maneuver aids to concentrate pressure to a

> Can a piece be a hybrid of more than two components?
The rule 2.3 says no.  It is noted that this rule is a subject to discuss.
I thought about attack/defense balance, it seemed that hybrids are rather
strong (note that Rook+Bishop is a little bit stronger than ortodox Queen,
and usualy you have several such attackers) while King is too vulnerable,
so I decided to restrict attacking possibilities by rules 2.3 and 1 (Queen
is replaced by Guard).```

Artem Shvorin wrote on 2005-05-18 UTC
Recently I found a similar variant: <a href='/play/erf/ConfedCh.html'>Confederation</a> . The main difference is that in Confederation a piece cannot leave the hybrid while neither capturing nor forming a new hybrid with another piece. This restriction reduced the combinative power of hybrids and the game seems (for me ;) ) less interesting than Hybrids.

Charles Gilman wrote on 2005-05-19 UTCGood ★★★★
Another way to look at this is as a rex exclusive version of Fusion Chess. In some ways it is closer than that variant to FIDE Chess as the King cannot escape check through fusion with another piece.

Artem Shvorin wrote on 2005-05-19 UTC
I see that in Fusion Chess (like in Confederation and unlike in Hybrids) a compound piece can split only by moving into an empty square.

George Duke wrote on 2010-08-13 UTCGood ★★★★
Of the 20 or 30 clusters we can divide CVs into, Absorption Chess derivatives form a major one after number one Carrera-Birds. In the last comment here, Shvorin mentions two other derivatives, out of over a hundred members so far published, Confederation and Fusion. Some Absorption derivatives are part of a larger theme, or otherwise multifaceted, or rely on mechanism besides immediate capture for change of movement power; probably for example we include Pocket Mutation as subvariant of Absorption for the sake of complete classification into 2 or 3 dozen clusters. (In the full taxonomy, a given CV may be member of two clusters, but try to avoid three.) In Shvorin's preferred embodiment, Hybrid same-side units same-type may even coalesce, he answers Strong in another of these 6 comments. That could be a factor in Stalemate or easily-imaginable convenience, such as getting two Rooks to the other side on one square, where they then re-divide.