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Checkmating Applet (3 vs 1). Practice your checkmating skill with fairy pieces.[All Comments] [Add Comment or Rating]
Aurelian Florea wrote on Sun, May 22, 2022 03:13 PM UTC:

Why trying to define pieces I always get capture only pieces?!


Cardinal. Moves as Bishop or as Knight.[All Comments] [Add Comment or Rating]
Aurelian Florea wrote on Sun, May 22, 2022 02:42 PM UTC in reply to H. G. Muller from 02:36 PM:

I have noticed the general method. Thanks!


H. G. Muller wrote on Sun, May 22, 2022 02:36 PM UTC in reply to Aurelian Florea from 02:25 PM:

For larger board sizes you can try the general Checkmating Applet, upto 16x16. That also makes it more obvious what the general method is, for driving towards the edge, and then towards the corner.


Aurelian Florea wrote on Sun, May 22, 2022 02:25 PM UTC in reply to H. G. Muller from 02:14 PM:

Ok, thanks. It seems chessV in Grand chess cannot do it with small variantion. It probably does it with none, though! I tried that!


Parahouse. Members-Only Shogi + Strong pieces. (9x9, Cells: 81) [All Comments] [Add Comment or Rating]

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Cardinal. Moves as Bishop or as Knight.[All Comments] [Add Comment or Rating]
H. G. Muller wrote on Sun, May 22, 2022 02:14 PM UTC in reply to Aurelian Florea from 12:11 PM:

Use the "Try it" link in the Notes section, and start playing for black to see how it is done.


Aurelian Florea wrote on Sun, May 22, 2022 12:11 PM UTC:

Does this piece and king mate a lone king? How? Is it similar to KNB vs K? Does it work on any rectangular board?


Eight-Stone Chess. Players can move neutral stones as well as pieces.[All Comments] [Add Comment or Rating]
Aurelian Florea wrote on Sun, May 22, 2022 12:08 PM UTC:

This game is very interesting and it makes an interesting candidate for the interactive diagram. Probably the stones may be somehow implemented by holes. I'm not sure how neutral would be implemented in XBetza, though!


Parahouse. Members-Only Shogi + Strong pieces. (9x9, Cells: 81) [All Comments] [Add Comment or Rating]

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Decimaka (revised). Game where pieces promote on making a capture. (10x10) [All Comments] [Add Comment or Rating]
💡📝H. G. Muller wrote on Sat, May 21, 2022 08:18 AM UTC:

I now also upgraded the general Diagram script to get more realistic piece values for this variant. It had a rather complex algorithm for determining the contribution of promotability to the piece value. Which would determine the ease of promotion based on counting the fraction of moves that would enter the promotion zone in (randomly generated) test positions, and assume the product of this ease and the promotion gain would determine the probability that this piece would indeed promote during the game. (Assuming that pieces with a less attractive promotion prospects would have to be traded away to clear the way for that.) This of course gave rather non-sensical results if there was no promotion zone at all. In that case the Diagram now assumes promotion on capture for promotable pieces (as specified by maxPromote). It then adds 50% of the promotion gain if this is positive, and subtracts 10% of the devaluation if it is a demotion (assuming there are ways to avoid it, but that this avoidance does make the piece less useful).


Pandemonium (Surajang修羅場). Capablanca chess + Crazyhouse.[All Comments] [Add Comment or Rating]
💡📝Daphne Snowmoon wrote on Sat, May 21, 2022 07:22 AM UTC:

I added 'Campmate'.


Parahouse. Members-Only Shogi + Strong pieces. (9x9, Cells: 81) [All Comments] [Add Comment or Rating]

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ArchMage Chess. 10x10 30v30 Fantasy Chess. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
Greg Strong wrote on Fri, May 20, 2022 08:20 PM UTC in reply to Daniel Zacharias from 07:37 PM:

@Daniel,

Now there's an interesting idea!


Daniel Zacharias wrote on Fri, May 20, 2022 07:37 PM UTC in reply to H. G. Muller from 06:36 PM:

The suggested changes to the summoning rule seem overly complicated to me. I would suggest instead making the summoned pieces switch sides when captured, like shogi pieces. Then the players would want to be careful about losing the demon, since that would allow the opponent to summon it later. If you want losing a summoner to be more consequential, a captured demon could only switch sides if the capturing player still has the right piece to summon it back.


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