MESON Chess Problem Database

Problem Display
PID: 53814 (qr1N2nB/1p2rPNn/1pRp2p1/4k1p1/1PP5/1P4P1/2B1K3/5Q2 w - - 0 1)

Rudd, Charles Dember

Chess, 1942

qr1N2nB/1p2rPNn/1pRp2p1/4k1p1/1PP5/1P4P1/2B1K3/5Q2

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4+
      • 2.Sge6#
    • 1...Qa1
      • 2.Qxa1#
    • 1...g4
      • 2.Qf4#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qc3#
      • 1...Kd4+
        • 2.Sge6#
      • 1...d5
        • 2.Qxd5#
        • 2.Qe3#
      • 1...Qa1!
    • 1.Qf5+?
      • 1...Kd4+
        • 2.Sge6#
      • 1...gxf5!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qc3#
      • 1...Kd4+
        • 2.Sge6#
      • 1...Kf6+
        • 2.Sge6#
      • 1...Qa1
        • 2.Qxa1#
      • 1...d5
        • 2.Kd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);CHECK,S_FLIGHT::B(L)+S(J),DCHECK
    • Q(i);N_GUARD::QAB(A),XQ(i)
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • K(a);CHECK,S_FLIGHT::B(L)+S(J),DCHECK
      • Refutation
        • Q(i);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);CHECK,S_FLIGHT::B(L)+S(J),DCHECK
      • Refutation
        • P(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(a);CHECK,S_FLIGHT::B(L)+S(J),DCHECK
      • K(a);CHECK,P_SPINP(d),S_FLIGHT::B(L)+S(J)
      • Q(i);N_GUARD::QAB(A),XQ(i)
      • P(d);::QAR(A)+K(C)
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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).