[Retros] Three SPG's from Paul Monsky

[Noam Elkies]

Dear Retro list (cc: P.Monsky),

Paul Monsky sends me three more proof games, on a different theme from
last year's but related to each other:

  2krq1n1/1b1pp3/2p2ppp/1p6/7b/8/P1PPPP1P/RNBQKBNR   (after 13.0)

  2krrnq1/1b1ppp2/1pp3pp/8/8/P1P5/2RPPPPP/b1BQKBNR   (after 15.0)

  rk1r2n1/bp2pp2/2ppb1pp/8/P4q1P/8/2PPPPP1/RNBQKBN1  (after 15.5)

The first is C+ Euclide; Paul has not been able to completely test
the other two.  They all look publishable to me, assuming they are
sound and not directly anticipated -- though the 15.0-mover may allow
some small local improvements like 15 c4.  Can the 15- and 15.5-move
games be computer tested?  If sound, how novel are they?  I suspect that
the formal content of the 13.0-mover has been shown, though the mechanism
here may be original, and the content of the 15.5 mover may be new too
-- those these are just guesses based on a nebulous sense of the current
state of the art.

Thanks,
--Noam D. Elkies