MESON Chess Problem Database

Problem Display
PID: 242342 (1B5r/1Q5p/2q1p2K/n3N3/4kn1R/2P1N1b1/4PP2/5r2 w - - 0 1)

Morra, Juan Carlos

Norsk Sjakkblad, 1958

1B5r/1Q5p/2q1p2K/n3N3/4kn1R/2P1N1b1/4PP2/5r2

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qxb1#
    • 1...Rc8
      • 2.Qxh7#
    • 1...Rd8
      • 2.Qxh7#
    • 1...Re8
      • 2.Qxh7#
    • 1...Sb3
      • 2.Qxc6#
    • 1...Sc4
      • 2.Qxc6#
  • Keys
    • 1.S5c4!
      • threat
        • 2.Sd2#
      • 1...e5+
        • 2.Sd6#
      • 1...Rxf2
        • 2.Qb1#
      • 1...Rxb8
        • 2.Qxh7#
      • 1...Bxf2
        • 2.Rxf4#
      • 1...Sxc4
        • 2.Qxc6#
      • 1...Rd1
        • 2.f3#
      • 1...Rd8
        • 2.Qxh7#
      • 1...Sb3
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::QAB(H),XR(a)
    • R(i);N_GUARD::QAB(H),XP(h)
    • S(e);N_GUARD::QAB(H),XQ(f)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • P(g);CHECK,SBLOCK::S(F)
      • R(a);N_GUARD,XP(B)::QAB(H)
      • R(i);N_GUARD,XB(I)::QAB(H),XP(h)
      • B(b);N_GUARD,XP(B)::R1(E),XS(d)
      • S(e);N_GUARD,XS(F)::QAB(H),XQ(f)
      • R(a);N_GUARD::P(B)
      • R(i);N_GUARD::QAB(H),XP(h)
      • S(e);N_GUARD::QAB(H),XQ(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).