MESON Chess Problem Database

Problem Display
PID: 11502 (2Q3bB/8/1p3q1r/3Pb3/2Nk3p/1PR1NP2/1K6/8 w - - 0 1)

Hughes, NL

Chess, 1939

2Q3bB/8/1p3q1r/3Pb3/2Nk3p/1PR1NP2/1K6/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qd8
      • 2.Bxe5#
    • 1...Qg6
      • 2.Bxe5#
    • 1...Qf7
      • 2.Bxe5#
    • 1...Qf8
      • 2.Bxe5#
    • 1...Bxd5
      • 2.Sc2#
  • Tries
    • 1.Sf5+?
      • 1...Kxd5
        • 2.Sce3#
      • 1...Qxf5!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Qc4#
      • 1...Bxd5
        • 2.Sc2#
      • 1...Bh2
        • 2.Sc6#
      • 1...Bg3
        • 2.Sc6#
      • 1...Bf4
        • 2.Sc6#
      • 1...Bd6
        • 2.Sc6#
      • 1...Bc7
        • 2.Sc6#
      • 1...Bb8
        • 2.Sc6#
      • 1...Qc6
        • 2.Qg4#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • Q(e);OGATE,P_SPINB(c)::B(I),XB(c)
    • B(g);SBLOCK,XP(G)::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT,P_PINR(C),XP(G)::S(F)
      • Refutation
        • Q(e);P_SPINB(c),XS(D)
  • Actual
    • S(F);
    • Threat
      • QAR1(H)
    • Vars
      • B(g);SBLOCK,XP(G)::S(D)
      • B(c);P_SPINQ(e)::S(F)
      • Q(e);N_GUARD,P_SPINB(c)::QAR(H)
      • P(d);N_GUARD::QAB1(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).