MESON Chess Problem Database

Problem Display
PID: 2984 (6n1/2p2NP1/2pp4/2N3Q1/1B1kP3/1P2pP2/6p1/6Kb w - - 0 1)

Williams, Philip Hamilton

Source?, 1915

6n1/2p2NP1/2pp4/2N3Q1/1B1kP3/1P2pP2/6p1/6Kb

#2

9 + 8

2681 All Change Here! 1919

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qf6#
    • 1...Se7
      • 2.Qf6#
    • 1...e2
      • 2.Qd2#
    • 1...dxc5
      • 2.Qd8#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Se5?
      • threat
        • 2.Se6#
        • 2.Sxc6#
      • 1...dxe5
        • 2.Qd8#
      • 1...Se7
        • 2.Se6#
      • 1...dxc5!
    • 1.Sd8?
      • threat
        • 2.Sxc6#
        • 2.Sde6#
      • 1...Se7
        • 2.Sde6#
        • 2.Qf6#
      • 1...dxc5!
    • 1.Bd2?
      • threat
        • 2.Qxe3#
      • 1...e2
        • 2.Qe3#
      • 1...exd2!
    • 1.Qf4?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sh6
        • 2.Qf6#
      • 1...Se7
        • 2.Qf6#
      • 1...e2
        • 2.Qd2#
      • 1...d5
        • 2.Qe5#
        • 2.e5#
      • 1...dxc5!
    • 1.Qf5?
      • 1...dxc5
        • 2.Qd7#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sh6
        • 2.Qf6#
      • 1...Se7
        • 2.Qf6#
      • 1...d5
        • 2.Qe5#
      • 1...e2!
  • Keys
    • 1.Qh4!
      • 1...dxc5
        • 2.Qd8#
      • 1...e2
        • 2.Qf2#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sh6
        • 2.Qf6#
      • 1...Se7
        • 2.Qf6#
      • 1...d5
        • 2.e5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::QAB(G),XS(h)
    • S(h);N_GUARD::QAB(G)
    • P(c);OGATE::QAR2(G)
    • P(f);OGATEB,XS(F)::QAR(G)
    • P(f);N_GUARD::QAB1(G)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATEB,SBLOCK,XS(H)::QAR(G)
        • S(h);::S(F)
      • Refutation
        • P(f);XS(F)
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Refutation
        • P(f);XS(F)
    • Try
      • B(D);
      • Threat
        • QAB1(G),XP(c)
      • Vars
        • P(c);::QAB1(G)
      • Refutation
        • P(c);XB(D)
    • Try
      • Q(G);
      • Vars
        • S(h);N_GUARD::QAB(G),XS(h)
        • S(h);N_GUARD::QAB(G)
        • P(c);OGATE::QAR2(G)
      • Refutation
        • P(f);XS(F)
    • Try
      • Q(G);
      • Vars
        • P(f);OGATEB,XS(F)::QAR(G)
        • S(h);N_GUARD::QAB(G),XS(h)
        • S(h);N_GUARD::QAB(G)
        • P(f);N_GUARD::QAB1(G)
      • Refutation
        • P(c);
  • Actual
    • Q(G);
    • Vars
      • P(f);OGATEB,XS(F)::QAR(G)
      • P(c);OGATEB::QAB(G)
      • S(h);N_GUARD::QAB(G),XS(h)
      • S(h);N_GUARD::QAB(G)
      • P(f);SBLOCK::QAR(G)+P(E)
HTML5 logo

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).