MESON Chess Problem Database

Problem Display
PID: 96584 (3Qn3/8/nRp3p1/2kBN3/6r1/P4p1q/1Pr5/Kb1R2b1 w - - 0 1)

Morra, Juan Carlos

Problem (Zagreb), 1952

3Qn3/8/nRp3p1/2kBN3/6r1/P4p1q/1Pr5/Kb1R2b1

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Sd3#
    • 1...Sd6
      • 2.Sd7#
    • 1...cxd5
      • 2.Rxd5#
  • Tries
    • 1.Qe7+?
      • 1...Sd6
        • 2.Sd7#
      • 1...Kxb6!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Rxc6#
      • 1...Rcxc4
        • 2.Sd7#
      • 1...Rgxc4
        • 2.Sd3#
      • 1...Sb4
        • 2.axb4#
      • 1...Sb8
        • 2.b4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(b);P_PINP(C),SBLOCK::S(F)
    • S(k);SBLOCK::S(F)
    • P(i);OGATE,XB(E)::R1(B),XP(i)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(k);P_SPINS(k)::S(F)
      • Refutation
        • K(g);S_FLIGHT,XR(G)
  • Actual
    • B(E);
    • Threat
      • R1(G),XP(i)
    • Vars
      • R(c);SBLOCK,XB(E)::S(F)
      • R(f);SBLOCK,XB(E)::S(F)
      • S(h);OGATE::P(D),XS(h)
      • S(h);N_GUARD::P(C)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).