MESON Chess Problem Database

Problem Display
PID: 51410 (KN3n1q/7B/2Q2n1r/2p3Nr/2Pk4/1P6/3P3B/6Rb w - - 0 1)

Morra, Juan Carlos

The Guardian, 1959

KN3n1q/7B/2Q2n1r/2p3Nr/2Pk4/1P6/3P3B/6Rb

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Sxf3#
    • 1...Bxc6+
      • 2.Sxc6#
    • 1...Se4
      • 2.Qd5#
    • 1...Se6
      • 2.Sxe6#
    • 1...Sd7
      • 2.Se6#
  • Keys
    • 1.Qf3!
      • threat
        • 2.Sc6#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...S6xh7
        • 2.Rg4#
      • 1...S8xh7
        • 2.Se6#
      • 1...Se4
        • 2.Qe3#
      • 1...Sg4
        • 2.Rxg4#
      • 1...Sd5
        • 2.Qd3#
      • 1...S6d7
        • 2.Rg4#
      • 1...Se8
        • 2.Rg4#
      • 1...Sg8
        • 2.Rg4#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sg6
        • 2.Se6#
      • 1...S8d7
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::S(F),XB(a)
    • B(a);CHECK,XQ(G)::S(J),XB(a)
    • S(e);N_GUARD,N_PINQ(G),S_CUTB(a)::QAR1(G)
    • S(g);N_GUARD,P_PINS(J)::S(F),XS(g)
    • S(g);N_GUARD,P_PINS(J)::S(F)
  • Actual
    • Q(G);
    • Threat
      • S(J)
    • Vars
      • B(a);CHECK,XQ(G)::S(F),XB(a)
      • S(e);N_GUARD,XB(H)::R(A)
      • S(g);N_GUARD,P_PINS(J),XB(H)::S(F)
      • S(e);N_PINQ(G)::QAB1(G)
      • S(e);N_GUARD::R(A),XS(e)
      • S(e);N_PINQ(G)::QAR1(G)
      • S(e);N_GUARD::R(A)
      • S(g);N_GUARD,P_PINS(J)::S(F),XS(g)
      • S(g);N_GUARD,P_PINS(J)::S(F)
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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).