MESON Chess Problem Database

Problem Display
PID: 47380 (7Q/3p4/p1p3KN/qPBk1P2/3P4/1Pn1P1b1/N1Prp3/8 w - - 0 1)

Howard, David M

Problem Observer, 2003

7Q/3p4/p1p3KN/qPBk1P2/3P4/1Pn1P1b1/N1Prp3/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Sxc3#
    • 1...Qc7
      • 2.Sxc3#
    • 1...Qd8
      • 2.Sxc3#
    • 1...Qa3
      • 2.Sxc3#
    • 1...Qa4
      • 2.Sxc3#
    • 1...Qxb5
      • 2.Sxc3#
    • 1...Rxd4
      • 2.Qxd4#
    • 1...Be1
      • 2.Qe5#
    • 1...Bf2
      • 2.Qe5#
    • 1...Bh4
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Se4
      • 2.Qg8#
      • 2.c4#
    • 1...cxb5
      • 2.Qa8#
  • Tries
    • 1.e4+?
      • 1...Sxe4
        • 2.Qg8#
        • 2.c4#
      • 1...Kxe4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.Qh1#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...cxb5
        • 2.Qa8#
      • 1...Qd8
        • 2.Sxc3#
      • 1...Bh4
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Se4
        • 2.Qg8#
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD::S(A),XS(c)
    • Q(e);N_GUARD,XP(F)::S(A),XS(c)
    • R(a);OGATE,XP(E)::QAR1(K),XR(a)
    • B(d);N_GUARD::QAR1(K)
    • B(d);N_GUARD::QAR1(K),XB(d)
    • P(h);OGATEB,XP(F)::QAB(K)
  • Tries
    • Try
      • P(D);CHECK
      • Refutation
        • K(f);S_FLIGHT,XP(D)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • K(f);S_FLIGHT::QAB(K)
      • R(a);OGATE,XP(E)::QAR1(K),XR(a)
      • P(h);OGATEB,XP(F)::QAB(K)
      • Q(e);N_GUARD::S(A),XS(c)
      • B(d);N_GUARD::QAR1(K)
      • B(d);N_GUARD::QAR1(K),XB(d)
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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).