MESON Chess Problem Database

Problem Display
PID: 196953 (8/4B3/R1Np2B1/3P2Pr/2P2k1p/1b6/r1n5/3Nn1QK w - - 0 1)

MacBride, Robert C

Brisbane Courier, 1919

8/4B3/R1Np2B1/3P2Pr/2P2k1p/1b6/r1n5/3Nn1QK

#2

10 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qf2+?
      • 1...Kg4
        • 2.Bf5#
      • 1...Sf3!
    • 1.Qe3+?
      • 1...Kg4
        • 2.Sf2#
      • 1...Sxe3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qh2#
      • 1...Kxe5
        • 2.Bxd6#
      • 1...Rxg5
        • 2.Qxg5#
      • 1...dxe5
        • 2.Rf6#
      • 1...Sf3
        • 2.Sd3#
      • 1...Sa1
        • 2.Qe3#
      • 1...Sa3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::B(I)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::S(A)
      • Refutation
        • S(c);XQ(B)
  • Actual
    • S(H);
    • Threat
      • QAB(B)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(H)::B(J),XP(h)
      • R(g);OGATE,XP(F)::QAB1(B),XR(g)
      • P(h);OGATE,SBLOCK,XS(H)::R(G)
      • S(a);N_GUARD,SBLOCK::S(H)
      • S(c);N_GUARD::QAB1(B)
      • S(c);N_GUARD::QAB1(B),XS(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).