MESON Chess Problem Database

Problem Display
PID: 45353 (8/8/1K2bQ2/3k2p1/R2p1n2/8/3pr2B/bB6 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

8/8/1K2bQ2/3k2p1/R2p1n2/8/3pr2B/bB6

#2

5 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Qxf4?
      • threat
        • 2.Ba2#
        • 2.Qd6#
      • 1...Rxh2
        • 2.Ba2#
        • 2.Be4#
      • 1...Re5
        • 2.Qxe5#
      • 1...d1Q
        • 2.Qd6#
      • 1...d1S
        • 2.Qd6#
      • 1...d1B
        • 2.Qd6#
      • 1...d1R
        • 2.Qd6#
      • 1...Re3
        • 2.Qd6#
      • 1...gxf4!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qc5#
      • 1...Ke5
        • 2.Ra5#
      • 1...Bh3
        • 2.Ba2#
      • 1...Bg4
        • 2.Ba2#
      • 1...Bf5
        • 2.Ba2#
      • 1...Bd7
        • 2.Ba2#
      • 1...Bf7
        • 2.Ba2#
      • 1...Bc8
        • 2.Ba2#
      • 1...Bg8
        • 2.Ba2#
      • 1...Sd3
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);XS(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_GUARD::QAR1(E),XR(c)
        • P(b);::QAR1(E)
        • R(c);::QAR1(E)
      • Refutation
        • P(g);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(f);P-FLIGHT,P_SPINB(h),P_SPINS(e)::R(C)
      • B(h);::B(A)
      • S(e);::QAB(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).