MESON Chess Problem Database

Problem Display
PID: 133177 (5N2/3R4/2k3b1/Ppr5/4n1N1/2B5/2Q3R1/2K4B w - - 0 1)

Dragoescu, Radu

4th HM., Themes-64, 1986

5N2/3R4/2k3b1/Ppr5/4n1N1/2B5/2Q3R1/2K4B

#2

9 + 5

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxg6#
    • 1...Sf2
      • 2.Qxg6#
    • 1...Sxc3
      • 2.Qxg6#
    • 1...Sg3
      • 2.Qxg6#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Se5#
      • 1...Rxc2+
        • 2.Rxc2#
      • 1...Sd6
        • 2.Qxc5#
      • 1...Sc3
        • 2.Qxg6#
      • 1...b4!
    • 1.Qxe4+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...Bxe4!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Se5#
      • 1...Rxc2+
        • 2.Rxc2#
      • 1...Sd6
        • 2.Qxc5#
      • 1...Sc3
        • 2.Qxg6#

Anticipated by 64345(1935)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);OGATE::QAR(C),XB(e)
    • S(a);OGATE,XB(E)::QAR(C),XB(e)
  • Tries
    • Try
      • B(E);P_PINR(c),P_SPINQ(C)
      • Threat
        • S(F)
      • Vars
        • R(c);CHECK,N_SPINR(c),OGATE,XQ(C)::R(D),XR(c)
        • S(a);N_GUARD::QAR1(C),XR(c)
        • S(a);N_PINQ(C),N_SPINR(c)::QAR(C),XB(e)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK,P_SPINB(E),XS(a)
      • Vars
        • R(c);N_GUARD,N_PINB(E),P_SPINR(c)::QAB1(C),XR(c)
      • Refutation
        • B(e);XQ(C)
  • Actual
    • B(E);P_PINR(c),P_SPINQ(C)
    • Threat
      • S(F)
    • Vars
      • R(c);CHECK,N_SPINR(c),OGATE,XQ(C)::R(D),XR(c)
      • S(a);N_GUARD::QAR1(C),XR(c)
      • S(a);N_PINQ(C),N_SPINR(c)::QAR(C),XB(e)
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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).