MESON Chess Problem Database

Problem Display
PID: 84654 (8/3Kn3/Q2Pp3/2p1k2N/1NP2p2/8/3PP3/1B3bqn w - - 0 1)

Fillery, William Edmund Frank

The Problemist, 1950

8/3Kn3/Q2Pp3/2p1k2N/1NP2p2/8/3PP3/1B3bqn

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qa1#
    • 1...Qg2
      • 2.Qa1#
    • 1...Qg4
      • 2.Qa1#
    • 1...Qg5
      • 2.Qa1#
    • 1...Qg6
      • 2.Qa1#
    • 1...Qg7
      • 2.Qa1#
    • 1...Qg8
      • 2.Qa1#
    • 1...Sf2
      • 2.Qa1#
    • 1...Sd5
      • 2.Sc6#
    • 1...Sf5
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sg6
      • 2.Sc6#
    • 1...Sc8
      • 2.Sc6#
    • 1...Sg8
      • 2.Sc6#
  • Tries
    • 1.dxe7?
      • threat
        • 2.Sc6#
        • 2.Qd6#
      • 1...Kd4
        • 2.Sc6#
      • 1...cxb4
        • 2.Qd6#
      • 1...Qg2
        • 2.Qa1#
        • 2.Qd6#
      • 1...Bg2
        • 2.Qd6#
      • 1...Qd4+!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Qd4
        • 2.Qh8#
      • 1...Qe3
        • 2.Qh8#
      • 1...Qg2
        • 2.Qa1#
      • 1...Qg6
        • 2.Qa1#
      • 1...Bg2
        • 2.Qh8#
      • 1...Sf2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qh8#
      • 1...Sd5
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::QAB(G)
    • S(c);S_CUTQ(b)::QAB(G)
    • S(h);N_GUARD::S(D)
    • S(h);N_GUARD::S(D),XS(h)
  • Tries
    • Try
      • P(H);XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • K(f);S_FLIGHT::S(D)
        • P(e);XS(D)::QAB1(G)
        • B(a);::QAB1(G)
      • Refutation
        • Q(b);CHECK
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • K(f);S_FLIGHT::QAR1(G)
      • Q(b);N_GUARD,P_PINP(H),SBLOCK::QAB(G)
      • Q(b);N_GUARD::QAB(G)
      • B(a);S_CUTQ(b)::QAB(G)
      • S(c);S_CUTQ(b)::QAB(G)
      • S(h);N_GUARD::S(D)
      • S(h);N_GUARD::S(D),XS(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).