MESON Chess Problem Database

Problem Display
PID: 43372 (2R3B1/3Q4/2n1n3/p1NPr3/P1kp3R/3N4/4p2K/B7 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

2R3B1/3Q4/2n1n3/p1NPr3/P1kp3R/3N4/4p2K/B7

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sxe5#
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb3#
      • 1...Kxd5
        • 2.Rxd4#
      • 1...Sxc5
        • 2.Qb5#
      • 1...Sb4
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD,SBLOCK::S(C),XR(e)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • K(b);N_SPINP(c),P_SPINS(f),S_FLIGHT,XP(G)::R1(E),XP(c)
      • S(g);XS(F)::QAB1(H)
      • S(f);N_GUARD::S(C),XR(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).