MESON Chess Problem Database

Problem Display
PID: 169891 (1Rrk4/2n1p3/3p1NPr/3b1N2/1Q4BB/6K1/8/8 w - - 0 1)

Freixa, Emilio

SEPA, 1945

1Rrk4/2n1p3/3p1NPr/3b1N2/1Q4BB/6K1/8/8

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb8
      • 2.Qxb8#
    • 1...e5
      • 2.Qxd6#
    • 1...e6
      • 2.Qxd6#
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Rxc8#
      • 1...Rxb8
        • 2.Qxb8#
      • 1...exd6
        • 2.Qxd6#
      • 1...exf6
        • 2.Bxf6#
      • 1...e5
        • 2.Sh5#
      • 1...e6
        • 2.Sf7#
      • 1...Be6
        • 2.Sb7#
      • 1...Bb7
        • 2.Sxb7#
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);N_SPINR(f),OGATE,XR(H)::QAR2(B),XR(f)
    • P(e);N_GUARD::QAR2(B),XP(b)
  • Actual
    • S(E);XP(b)
    • Threat
      • R1(H),XR(f)
    • Vars
      • R(f);N_SPINR(f),OGATE,XR(H)::QAR2(B),XR(f)
      • P(e);OGATE,XS(E)::QAR2(B),XP(e)
      • P(e);OGATE,P_SPINP(e),XS(F)::B(D),XP(e)
      • P(e);::B(D)+S(F)
      • P(e);S_CUTB(a)::S(E)
      • B(a);N_GUARD::S(E)
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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).