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MatPlus.Net Forum Retro/Math Fastest stalemate with Isardam rules
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(1) Posted by Paul Raican [Friday, May 23, 2008 11:22]

Fastest stalemate with Isardam rules

Hi retro-friends,
Recently, I published in Quartz 32 the following dual-free proof game which leads to stalemate in Madrasi:
Joost de Heer
Dedicated to Nicolas Dupont
(= 15+12 )

SPG 9.5 (Madrasi)

1. g4 Sa6 2. g5 h5 3. d4 Rh6 4. d5 Rc6 5. dc6 Sf6 6. gf6 Sb4 7. Bg5 Sxa2
8. e3 Sc1 9. Qxh5 Se2 10. Rxa7=

Now, I put a corresponding problem for Isardam genre and I just found a dual-free PG in 12.5 moves. Can somebody find one shorter?

Notation converted to diagram by Admin
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(2) Posted by Guy Sobrecases [Tuesday, May 27, 2008 14:08]

Thank you Paul!
I did not succeed to build a shorter SPG in Isardam, but I think that this one shows 8.5 moves in Madrasi:

(= 15+15 )

SPG 8.5 moves

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(3) Posted by Hauke Reddmann [Wednesday, May 28, 2008 10:45]

What a wacky idea. Like it! Like it!
Eh, I'm not familiar with fairy chess - can't the same
thing be done much faster with a Qf6?

1.e3 f5 2.h3 Kf7 3.Qe2 Kg6 4.Qa6+ Kh5 5.Qf6 f4 6.g4 =

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(4) Posted by Guy Sobrecases [Wednesday, May 28, 2008 11:07]

Yes, this would be shorter.
The point is no arrange the unicicity of the moves order, to obtain a SPG. Not easy.
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(5) Posted by Juraj Lörinc [Wednesday, May 28, 2008 22:56]

Yes, quite funny idea of en passant in Madrasi that was repeatedly discovered by a few composers. Ivan Skoba was not the first, but he has probably worked with it most and 8 years ago he has published an article on that in Pat a Mat. See the short excerpt at

In the context of this discussion the 6th problem is the most interesting, home-base h=5 that has made it into FIDE Album 1998-2000. (Also great 3rd problem, ser-r#29 has made it, but there the paralysis of pawn is only temporary.)
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(6) Posted by Guy Sobrecases [Friday, May 30, 2008 13:43]

...and Paul just told me that 6.5 moves have been achieved with the same principle in Quartz.

End of the story for Madrasi, I think
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(7) Posted by Joost de Heer [Thursday, Jun 12, 2008 15:35]

This composition was made to show the fastest Madrasi stalemate without using the 'ep trick'.
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(8) Posted by Juraj Lörinc [Thursday, Jun 12, 2008 20:37]

Indeed, the e.p. trick is something peculiar. :-)
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MatPlus.Net Forum Retro/Math Fastest stalemate with Isardam rules