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Done. I was afraid but in fact it was not so complicated. :) if (FUserMove = 'e1g1') and FGame.IsLegal('e1h1') and FGame.IsCastling('e1h1') then FUserMove := 'e1h1'; if (FUserMove = 'e1c1') and FGame.IsLegal('e1a1') and FGame.IsCastling('e1a1') then FUserMove := 'e1a1'; if (FUserMove = 'e8g8') and ...

Very nice, thanks.
Would it be possible to also support castling (say in orthodox mode) by moving the king to the target position? KxR is fine, sure, but...

I think polls are broken since the forum transition.

Hmm, could this be a hint that Fritz 17 is Ethereal? viewtopic.php?f=2&t=72170

I do something entirely different in Cheng, very simple actually and it seems to work well (I bet others do the same as well, the "lazy" approach): - disable aspiration window if MultiPV > 1 - only do zw search to make sure it beats current worst MultiPV move as soon as I have searched first MultiPV...

A singly-linked list seems like it can easily implement a stack. I'm pretty sure a singly-linked list can implement a queue (but it takes a bit of thought). A dequeue however... that is push-front, push-back, pop-front, and pop-back... seems to require a doubly-linked list. And the "XOR-pointer" tr...

Reminds me of the doubly-linked list with only "one pointer" trick, by only storing (prev XOR next). Sorry for a bit of OT but how is that supposed to work? You'd need to know a pointer of either neighbor, so deleting an item from the list would still require O(N) traversal just like a singly linke...

My guess is because masking by 2*63 already gives you a value that's already multiplied by two, masking out the LSBit

Does your scheme really pay off in terms of speedup? I'd expect that eval cache helps mostly in qs nodes anyway so my guess is tweaking the size of the eval table should be sufficient. But of course, if the scripting language you use is, say 10-20 times slower than native code... Perhaps you could e...

I always did only self-testing, and typically got about one half of the expected gain in CCRL. I certainly worked for me and works for others (if you play enough games) I did something non-standard perhaps, namely always playing against the last released version (=any fixed stable previous version);...