MESON Chess Problem Database

Problem Display
PID: 277894 (R7/2QKp3/4B3/2N5/1p1kN3/4q1Rr/2pp1P2/3n2n1 w - - 0 1)

Morra, Juan Carlos

To Mat, 1960

R7/2QKp3/4B3/2N5/1p1kN3/4q1Rr/2pp1P2/3n2n1

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Sb3#
    • 1...Sb2
      • 2.fxe3#
    • 1...Sc3
      • 2.fxe3#
    • 1...b3
      • 2.Ra4#
  • Keys
    • 1.Sc3!
      • threat
        • 2.Sb5#
      • 1...Qxe6+
        • 2.Sxe6#
      • 1...Kxc3
        • 2.Qe5#
      • 1...Qxc3
        • 2.Rg4#
      • 1...Sxc3
        • 2.fxe3#
      • 1...bxc3
        • 2.Ra4#
      • 1...Qe2
        • 2.Sb3#
      • 1...Qd3
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD,SBLOCK,XS(C)::S(D)
    • S(a);N_GUARD::P(A),XQ(e)
    • P(g);OGATEB::R(H)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(e);CHECK,XB(E)::S(D),XQ(e)
      • K(h);N_GUARD,P_SPINQ(e),S_FLIGHT,XS(C)::QAB(F)
      • Q(e);N_GUARD,SBLOCK,XS(C)::R(B)
      • S(a);N_GUARD,SBLOCK,XS(C)::P(A),XQ(e)
      • P(g);OGATEB,SBLOCK,XS(C)::R(H)
      • Q(e);::S(D)
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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).