MESON Chess Problem Database

Problem Display
PID: 11186 (1b1Q1R2/p2N3n/1p1k4/q1N2K2/4Bn2/8/8/8 w - - 0 1)

Eddy, Edwin John

Chess, 1937

1b1Q1R2/p2N3n/1p1k4/q1N2K2/4Bn2/8/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sb7#
    • 1...Qd2
      • 2.Sb7#
    • 1...Qc3
      • 2.Sb7#
    • 1...Qb4
      • 2.Sb7#
    • 1...Qa1
      • 2.Sb7#
    • 1...Qa2
      • 2.Sb7#
    • 1...Qa3
      • 2.Sb7#
    • 1...Qa4
      • 2.Sb7#
    • 1...Qxc5+
      • 2.Se5#
    • 1...bxc5
      • 2.Sb6#
    • 1...b5
      • 2.Sb7#
  • Tries
    • 1.Rf6+?
      • 1...Se6
        • 2.Rxe6#
      • 1...Sxf6!
    • 1.Qe7+?
      • 1...Kc7
        • 2.Se5#
        • 2.Sf6#
        • 2.Sxb8#
        • 2.Qe5#
      • 1...Kxe7!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qxb8#
      • 1...Qxc5+
        • 2.Se5#
      • 1...bxc5
        • 2.Sb6#
      • 1...Sd5
        • 2.Re6#
      • 1...Bc7
        • 2.Qe7#
      • 1...Se6
        • 2.Rxe6#
      • 1...b5
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_PINS(B)::S(B)
    • Q(b);CHECK,SBLOCK,XS(B)::QAR(E)+S(D)
    • P(c);SBLOCK,XS(B)::QAR(E)+S(D)
    • P(c);N_PINS(B)::S(B)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::R1(F),XS(a)
      • Refutation
        • S(f);XR(F)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(d);S_FLIGHT,XQ(E)
  • Actual
    • R(F);
    • Threat
      • QAB(E),XB(g)
    • Vars
      • Q(b);CHECK,SBLOCK,XS(B)::QAR(E)+S(D)
      • P(c);SBLOCK,XS(B)::QAR(E)+S(D)
      • S(a);N_GUARD,N_PINS(B)::R1(F)
      • B(g);SBLOCK::QAB1(E)
      • S(a);N_GUARD::R1(F),XS(a)
      • P(c);N_PINS(B)::S(B)
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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).