MESON Chess Problem Database

Problem Display
PID: 45407 (1nqQBR2/1Np3pK/b2r3p/b2k4/2p1R3/1P3P2/2N3n1/4r3 w - - 0 1)

de Blasio, Francis JC

Recomm., BCF 048. Ty., 1944-1945

1nqQBR2/1Np3pK/b2r3p/b2k4/2p1R3/1P3P2/2N3n1/4r3

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5+
      • 2.Rxf5#
    • 1...Qxb7
      • 2.Rf5#
    • 1...Qxd8
      • 2.Rf5#
    • 1...Bb4
      • 2.Sxb4#
    • 1...Bb6
      • 2.Sb4#
    • 1...c5
      • 2.Qxd6#
    • 1...c6
      • 2.Qxd6#
  • Tries
    • 1.Qg5+?
      • 1...Qf5+
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...hxg5!
  • Keys
    • 1.Qxc7!
      • threat
        • 2.Qxd6#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Qxb7
        • 2.Rf5#
      • 1...Qxc7
        • 2.Rf5#
      • 1...Bxc7
        • 2.Sb4#
      • 1...Bxb7
        • 2.bxc4#
      • 1...Qe6
        • 2.Qc5#
      • 1...Qd7
        • 2.Qc5#
      • 1...Qd8
        • 2.Rf5#
        • 2.Qc5#
      • 1...Rb6
        • 2.Qe5#
      • 1...Rc6
        • 2.Qe5#
      • 1...Re6
        • 2.Rd4#
      • 1...Rf6
        • 2.Qe5#
      • 1...Rg6
        • 2.Qe5#
      • 1...Rd7
        • 2.Rf5#
      • 1...Rd8
        • 2.Qe5#
      • 1...Bb4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 4
  • Sets
    • Q(l);CHECK,N_GUARD::R(I),XQ(l)
    • Q(l);N_GUARD,XS(E)::R(I)
    • Q(l);N_GUARD,N_SPINR(g),XQ(G)::R(I)
    • B(d);N_GUARD::S(A),XB(d)
    • B(d);N_GUARD::S(A)
    • P(i);N_GUARD::QAR1(G),XR(g)
  • Tries
    • Try
      • Q(G);CHECK,N_PINR(g)
      • Refutation
        • P(h);XQ(G)
  • Actual
    • Q(G);N_PINR(g),XP(i)
    • Threat
      • QAR1(G),XR(g)
    • Vars
      • Q(l);CHECK,N_GUARD::R(I),XQ(l)
      • Q(l);N_GUARD,XS(E)::R(I)
      • Q(l);N_GUARD,XQ(G)::R(I)
      • B(d);N_GUARD,XQ(G)::S(A)
      • B(f);N_GUARD,XS(E)::P(B),XP(c)
      • Q(l);N_GUARD::QAR1(G)
      • R(g);OGATE::QAR1(G)
      • R(g);SBLOCK::R1(D)
      • R(g);S_CUTQ(l)::R(I)
      • B(d);N_GUARD::S(A),XB(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).