MESON Chess Problem Database

Problem Display
PID: 43366 (3R4/BQ1N2p1/1Nb2p2/3PbR2/2pPkpP1/8/3PPP2/6K1 w - - 0 1)

Stevenson, Edward

Double Pin-Mate after a Black King Move, 1980

3R4/BQ1N2p1/1Nb2p2/3PbR2/2pPkpP1/8/3PPP2/6K1

#2

13 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qxd5#
  • Tries
    • 1.Rxe5+?
      • 1...Kxd4
        • 2.Sa4#
        • 2.Sa8#
        • 2.Sc8#
      • 1...fxe5!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc3#
      • 1...Kxd5
        • 2.Sdc5#
      • 1...Bxd4
        • 2.Qb1#
      • 1...Bxa4
        • 2.f3#
      • 1...c3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(e);OGATE,P_SPINB(e),XP(G)::QAB1(K),XB(e)
  • Tries
    • Try
      • R(H);CHECK,XB(d)
      • Refutation
        • P(f);XR(H)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(b);P_SPINB(d),S_FLIGHT,XP(G)::R(M)+S(L)
      • B(d);P_PINP(D),XP(E)::QAB(K)
      • B(e);XS(I)::P(D)
      • P(a);::S(I),XP(a)
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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).