MESON Chess Problem Database

Problem Display
PID: 157260 (6n1/1p1Q1p2/2n3p1/1Np4N/1p2k1P1/8/2b1PK1B/8 w - - 0 1)

Lincoln, Robert A

Chess Life, 1989

6n1/1p1Q1p2/2n3p1/1Np4N/1p2k1P1/8/2b1PK1B/8

#2

7 + 9

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qd3#
    • 1...Bb3
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
      • 2.exd3#
    • 1...Ba4
      • 2.Qd3#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sh6
      • 2.Sf6#
    • 1...Se7
      • 2.Sf6#
    • 1...b3
      • 2.Sc3#
    • 1...gxh5
      • 2.Qf5#
    • 1...g5
      • 2.Qf5#
    • 1...b6
      • 2.Qxc6#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Qd5#
      • 1...Bb3
        • 2.Qd3#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sge7
        • 2.Sf6#
      • 1...Sce7!
    • 1.Sg3+?
      • 1...Ke5
        • 2.Qd6#
      • 1...Kf4!
    • 1.Bc7?
      • threat
        • 2.Sg3#
      • 1...gxh5
        • 2.Qf5#
      • 1...Se5!
    • 1.Qe6+?
      • 1...Se5
        • 2.Qxe5#
      • 1...fxe6!
    • 1.Qd2?
      • threat
        • 2.Sd6#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sd4!
    • 1.Qd6?
      • threat
        • 2.Sg3#
      • 1...Se5
        • 2.Qxe5#
      • 1...gxh5!
  • Keys
    • 1.Qxf7!
      • threat
        • 2.Qf3#
      • 1...Sd4
        • 2.Sd6#
      • 1...Se5
        • 2.Sg3#
      • 1...Sf6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • B(a);N_GUARD::QAB1(G)
    • S(i);N_GUARD::S(F),XS(i)
    • S(i);N_GUARD::S(F)
    • P(b);N_GUARD::S(E)
    • P(f);N_GUARD,XS(F)::QAB1(G)
    • P(f);N_GUARD::QAB1(G)
    • P(g);N_GUARD::QAB(G),XS(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(G)
      • Vars
        • B(a);N_GUARD::QAB1(G)
        • S(i);N_GUARD::S(F),XS(i)
        • S(i);N_GUARD::S(F)
      • Refutation
        • S(e);
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(G)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(C);
      • Threat
        • S(F)
      • Vars
        • P(f);N_GUARD,XS(F)::QAB1(G)
      • Refutation
        • S(e);
    • Try
      • Q(G);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(G),XS(e)
      • Refutation
        • P(h);XQ(G)
    • Try
      • Q(G);
      • Threat
        • S(E)
      • Vars
        • B(a);N_GUARD::QAB1(G),XB(a)
      • Refutation
        • S(e);
    • Try
      • Q(G);
      • Threat
        • S(F)
      • Vars
        • S(e);N_GUARD::QAR1(G),XS(e)
      • Refutation
        • P(f);XS(F)
  • Actual
    • Q(G);XP(h)
    • Threat
      • QAB1(G)
    • Vars
      • S(e);SBLOCK::S(E)
      • S(e);SBLOCK::S(F)
      • S(i);N_GUARD::S(F),XS(i)
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).