MESON Chess Problem Database

Problem Display
PID: 51379 (3Q1N1B/8/8/r1p2b1R/4k2n/8/2P2K2/8 w - - 0 1)

Morra, Juan Carlos

Manchester Guardian, 1958

3Q1N1B/8/8/r1p2b1R/4k2n/8/2P2K2/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qxh4#
    • 1...Bh7
      • 2.Qxh4#
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Qxh4+?
      • 1...Bg4
        • 2.Qxg4#
      • 1...Kd5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qe5#
      • 1...Kf4
        • 2.Rxh4#
      • 1...Kd5
        • 2.Qe6#
      • 1...Sf3
        • 2.Qxf5#
      • 1...Sg6
        • 2.Qxf5#
      • 1...c4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD::QAR(D),XS(b)
    • P(d);N_GUARD::QAR1(D)
  • Tries
    • Try
      • Q(D);CHECK,XS(b)
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAR2(D),XB(e)
      • Refutation
        • K(a);P_SPINB(e),S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • K(a);P-FLIGHT,P_SPINB(e)::R(C),XS(b)
      • K(a);P_SPINB(e),S_FLIGHT::QAB1(D)
      • S(b);N_GUARD::QAB1(D),XB(e)
      • P(d);N_GUARD::QAR1(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).