Joost De Heer
Which means an illegal position, and hence no last move, so the ep capture is illegal.
On No.1692 (GT)
wPf4 and wPg5 originally came from f2 and g2. In one twin, wPf4 is the pawn from f2 and wPg5…
On No.1684 (JC&BM)
I use a few scripts to update and compile the Popeye develop-branch: svn.sh (to update the GIT branch to a…
On Popeye
It is used for move order.
On No.1683 (LK)
The rokagogo definition doesn't explicitly forbid castling to a square that is guarded, but not after the castling move (e.g.…
On No.1682 (AB&JM)
Georgi, why is Bg8 not pinned? A random move of the bishop will result in self-check, only the specific move…
On Unpin in JF10JT: important clarification
The rook isn't pinned, as a random move doesn't expose the king to check.
On Unpin in JF10JT: important clarification
Technically, the unpin/repin doesn't eliminate the pinned status of the bishop, so if the definition is interpreted literally, the example…
On Unpin in JF10JT: important clarification
What if the unpin results in a selfpin on a different line? W: Kh8, Bg8 B: Ra8, Rh1, Sh7 Bxh7[+Sg8]:…
On Unpin in JF10JT: important clarification
Can be trivially extended to 41 moves, starting with c2-c4. This seems to be a length record, longest ser-# with…
On No.1678 (KC)