MESON Chess Problem Database

Problem Display
PID: 58470 (K3bQ2/p1B5/2p3pN/1P2n2p/q3k2r/4r3/B1P1N1P1/8 w - - 0 1)

Martin, Ernst Otto

Schach, 1951

K3bQ2/p1B5/2p3pN/1P2n2p/q3k2r/4r3/B1P1N1P1/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qf4#
    • 1...Rh2
      • 2.Qf4#
    • 1...Rh3
      • 2.Qf4#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Sg4
      • 2.Qf4#
    • 1...g5
      • 2.Qf5#
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qxe5#
      • 1...Qxc2
        • 2.Qd4#
      • 1...Qxb5
        • 2.Qd4#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Sd3
        • 2.Sc3#
      • 1...Sf3
        • 2.Sg3#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sg4
        • 2.Qf4#
      • 1...Sd7
        • 2.Qxc6#
      • 1...Sf7
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::QAR1(I)
    • R(d);N_GUARD::QAR1(I),XR(d)
    • S(e);S_CUTR(d)::QAR1(I)
    • P(h);N_GUARD::QAB1(I)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I),XS(e)
    • Vars
      • Q(b);N_GUARD,XP(B)::QAR1(I)
      • Q(b);N_GUARD,XP(E)::QAR1(I)
      • Q(b);N_GUARD::QAR1(I),XQ(b)
      • S(e);S_CUTR(a)::S(C)
      • S(e);S_CUTQ(b)::QAR1(I)
      • S(e);OGATE::QAR1(I)
      • S(e);N_GUARD,S_CUTB(j)::QAB(I),XP(g)
      • S(e);N_GUARD,S_CUTB(j)::QAB(I),XP(h)
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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).