MESON Chess Problem Database

Problem Display
PID: 78167 (8/1KPN4/3kp3/8/4B3/7Q/8/4b3 w - - 0 1)

Pradignat, Emile Leonard

La Strategie, 1896

8/1KPN4/3kp3/8/4B3/7Q/8/4b3

#2

5 + 3

5454 Near Snap 2013
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.c8S#
  • Tries
    • 1.Qa3+?
      • 1...Kxd7
        • 2.Bc6#
        • 2.c8Q#
      • 1...Bb4!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qd3#
      • 1...Kxd7
        • 2.Qxe6#
      • 1...Ke7
        • 2.Qxe6#
      • 1...exd5
        • 2.c8S#
      • 1...e5
        • 2.Qe6#

Anticipated by 4636(1892), 249581(1892)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);::P=S
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(B);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XB(B)::QAR2(A)
      • K(b);P-FLIGHT,P_SPINP(c),XS(E)::QAB1(A),XP(c)
      • K(b);S_FLIGHT::QAR1(A),XP(c)
      • P(c);SBLOCK,XB(B)::P=S
      • P(c);::QAR1(A)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).