MESON Chess Problem Database

Problem Display
PID: 45364 (1b3Q2/3p1RK1/5pp1/2Nbk3/1np4N/2pr2P1/5P2/3R4 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

1b3Q2/3p1RK1/5pp1/2Nbk3/1np4N/2pr2P1/5P2/3R4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.f4#
  • Tries
    • 1.Qe7+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Be6!
  • Keys
    • 1.Rxd7!
      • threat
        • 2.Qxf6#
      • 1...Kd4
        • 2.Sf3#
      • 1...Rf3
        • 2.Qxb8#
      • 1...Bf7
        • 2.f4#
      • 1...f5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(b);::P(B)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(f);OGATE,P_SPINR(b),S_FLIGHT::QAB1(H)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • R(F);XP(i)
    • Threat
      • QAB1(H),XP(g)
    • Vars
      • K(f);P_SPINB(e),P_SPINR(b),S_FLIGHT::S(D)
      • R(b);::QAB(H),XB(j)
      • B(e);::P(B)
      • P(g);::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).