MESON Chess Problem Database

Problem Display
PID: 266242 (8/7Q/8/8/7q/8/6R1/R3K2k w Q - 0 1)

Speckmann, Werner

Die Schwalbe, 1973

8/7Q/8/8/7q/8/6R1/R3K2k

#2

4 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Kf1?
      • threat
        • 2.Qxh4#
      • 1...Qh2
        • 2.Kf2#
        • 2.Rg1#
        • 2.Rxh2#
        • 2.Qxh2#
      • 1...Qh3
        • 2.Kf2#
        • 2.Qxh3#
      • 1...Qh5
        • 2.Kf2#
        • 2.Qxh5#
      • 1...Qh6
        • 2.Kf2#
        • 2.Qxh6#
      • 1...Qxh7!
    • 1.Rg3?
      • threat
        • 2.Qxh4#
      • 1...Kh2
        • 2.Qxh4#
      • 1...Qh2
        • 2.0-0-0#
      • 1...Qh3
        • 2.Qxh3#
      • 1...Qh5
        • 2.Qxh5#
      • 1...Qh6
        • 2.Qxh6#
      • 1...Qxh7!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Kd2#
        • 2.Ke2#
        • 2.0-0-0#
      • 1...Kg1
        • 2.Ke2#
      • 1...Qxh7
        • 2.0-0-0#
      • 1...Qh5
        • 2.Kd2#
      • 1...Qh6
        • 2.Ke2#

FEATURES

  • Static
    • TYPE = WHITE_IN_CHECK
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR(D),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XQ(D)
    • Try
      • R(C);P_SPINR(C)
      • Threat
        • QAR(D),XQ(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(D),XQ(b)
        • Q(b);N_PINR(C)::0-0-0
        • Q(b);N_PINR(C),OGATE::QAR2(D),XQ(b)
        • Q(b);N_PINR(C),OGATEB::QAR(D),XQ(b)
      • Refutation
        • Q(b);N_PINR(C),N_SPINQ(b),XQ(D)
  • Actual
    • R(C);P_SPINR(C)
    • Threat
      • DUALS(3)
    • Vars
      • K(a);N_SPINQ(b),P-FLIGHT::R(A)+K(B)
      • Q(b);N_PINR(C),N_SPINQ(b),XQ(D)::0-0-0
      • Q(b);N_PINR(C)::R(A)+K(B)
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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).