MESON Chess Problem Database

Problem Display
PID: 15882 (1b3r2/3Q1n2/q1r3b1/pP5B/2NP4/p2k4/2R1R3/K1B5 w - - 0 1)

Barnes, Barry Peter

Quack, Godfrey C

The Problemist, 1988

1b3r2/3Q1n2/q1r3b1/pP5B/2NP4/p2k4/2R1R3/K1B5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Red2#
    • 1...a2
      • 2.Sb2#
  • Tries
    • 1.Qf5+?
      • 1...Kxd4
        • 2.Be3#
        • 2.Red2#
      • 1...Bxf5!
    • 1.Qd5?
      • threat
        • 2.Red2#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Bf4!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Rc3#
      • 1...axb2+
        • 2.Sxb2#
      • 1...Rxc4
        • 2.Rcd2#
      • 1...Bxh5
        • 2.Qf5#
      • 1...Rd6
        • 2.Qh3#
      • 1...Bd6
        • 2.Bxg6#
      • 1...Sd6
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(f);SBLOCK::R1(D)
    • P(a);N_GUARD::S(E)
  • Tries
    • Try
      • Q(I);CHECK
      • Refutation
        • B(f);XQ(I)
    • Try
      • Q(I);
      • Threat
        • R1(D)
      • Vars
        • R(e);OGATE,XS(E)::QAB1(I),XR(e)
      • Refutation
        • B(h);
  • Actual
    • B(B);
    • Threat
      • R1(C)
    • Vars
      • P(a);CHECK,XB(B)::S(E),XP(a)
      • R(e);SBLOCK,XS(E)::R1(C)
      • B(f);N_GUARD,XB(H)::QAB(I)
      • R(e);S_CUTB(h)::QAR(I)
      • B(h);S_CUTR(e)::B(H),XB(f)
      • S(g);N_GUARD,S_CUTB(h)::S(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).