MESON Chess Problem Database

Problem Display
PID: 44467 (3K4/5bp1/2p1k1rR/2Pp4/3Pr1N1/1P2N2B/4QR1P/1qb5 w - - 0 1)

Eddy, Edwin John

Het Schaakleven, 1932

3K4/5bp1/2p1k1rR/2Pp4/3Pr1N1/1P2N2B/4QR1P/1qb5

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Rxg6#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qf5#
        • 2.Qxf7#
      • 1...Rxe3
        • 2.Qxf7#
      • 1...Rxd4
        • 2.Qxf7#
      • 1...Rxg4
        • 2.Qxf7#
      • 1...Re5
        • 2.Qxf7#
      • 1...Rf6
        • 2.Qf5#
      • 1...Be8
        • 2.Qf5#
      • 1...Bg8
        • 2.Rxg6#
        • 2.Qf5#
      • 1...Rf4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sc7#
      • 1...Bg5+
        • 2.Sgf6#
      • 1...Kxd5
        • 2.Qc4#
      • 1...cxd5
        • 2.Qa6#
      • 1...Bf4
        • 2.Sge3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(h);N_GUARD::R(J),XR(g)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XS(E)::QAB1(A),XB(h)
        • R(c);XP(G)::QAB1(A),XB(h)
        • R(c);N_SPINR(g),P_SPINR(c),XS(H)::QAB1(A),XB(h)
        • R(c);::QAB1(A),XB(h)
        • R(g);::QAB1(A)
        • B(h);::QAB1(A)
      • Refutation
        • R(c);
  • Actual
    • S(E);N_PINR(g),P_PINR(c),XP(d)
    • Threat
      • S(E)
    • Vars
      • B(b);CHECK,S_CUTR(g)::B(F)+S(H)
      • K(f);N_SPINR(c),OGATEB,S_FLIGHT,XS(E)::QAB1(A)
      • P(e);OGATEB,SBLOCK,XS(E)::QAR(A)
      • B(b);::B(F)+S(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).