MESON Chess Problem Database

Problem Display
PID: 151821 (2qNNb2/2P4B/2QP4/R1P1k3/K5p1/2P1r1Pn/8/8 w - - 0 1)

Windle, REL

Good Companions (December), 1914

2qNNb2/2P4B/2QP4/R1P1k3/K5p1/2P1r1Pn/8/8

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3
      • 2.Qe4#
    • 1...Rd3
      • 2.Qe4#
    • 1...Rf3
      • 2.Qe4#
    • 1...Rxg3
      • 2.Qe4#
    • 1...Re4+
      • 2.Qxe4#
    • 1...Bxd6
      • 2.Qxd6#
      • 2.cxd6#
  • Keys
    • 1.Qf3!
      • threat
        • 2.c6#
      • 1...Re4+
        • 2.Qxe4#
      • 1...Qxc7
        • 2.Qf5#
      • 1...Qxd8
        • 2.Qf5#
      • 1...Rxc3
        • 2.Qe4#
      • 1...Bxd6
        • 2.cxd6#
      • 1...Qa6
        • 2.Qf5#
      • 1...Qe6
        • 2.Sc6#
      • 1...Qb7
        • 2.Qf5#
      • 1...Qa8
        • 2.Qf5#
      • 1...Qb8
        • 2.Qf5#
      • 1...Rd3
        • 2.Qe4#
      • 1...Sf4
        • 2.gxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD,XP(A)::QAR1(F)
    • R(a);N_GUARD::QAR1(F)
    • R(a);N_GUARD,XP(B)::QAR1(F)
    • R(a);CHECK,N_GUARD::QAR1(F),XR(a)
  • Actual
    • Q(F);
    • Threat
      • R(D)+P(E)
    • Vars
      • R(a);CHECK,N_GUARD::QAR1(F),XR(a)
      • Q(e);N_GUARD,XP(H)::QAR1(F)
      • Q(e);N_GUARD,XS(J)::QAR1(F)
      • R(a);N_GUARD,XP(A)::QAR1(F)
      • B(f);OGATE,XP(G)::R(D)+P(E),XB(f)
      • Q(e);N_GUARD,P_PINR(D)::QAR1(F)
      • Q(e);SBLOCK::S(J)
      • Q(e);N_GUARD::QAR1(F)
      • R(a);N_GUARD::QAR1(F)
      • S(b);OGATE::P(B),XS(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).