MESON Chess Problem Database

Problem Display
PID: 100852 (3n4/2pKp3/3b4/3k4/N1pp2N1/2B2P2/3n4/4Q3 w - - 0 1)

Benjamin, A Jac

Good Companions, 1921

3n4/2pKp3/3b4/3k4/N1pp2N1/2B2P2/3n4/4Q3

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qe5#
    • 1...Bb4
      • 2.Qe5#
    • 1...Bc5
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sf1
      • 2.Qe4#
    • 1...Sb3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
      • 2.fxe4#
    • 1...Sc6
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qe6#
    • 1...Sf7
      • 2.Qe6#
    • 1...d3
      • 2.Se3#
    • 1...c5
      • 2.Sb6#
    • 1...e5
      • 2.Sf6#
    • 1...e6
      • 2.Sf6#
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxd4#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...dxc3
        • 2.Sxc3#
      • 1...dxe3
        • 2.Sxe3#
      • 1...Bc5
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sb3
        • 2.Qe4#
      • 1...Sc6
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...d3
        • 2.Qd4#
      • 1...c5
        • 2.Sb6#
      • 1...e5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(e);N_GUARD::QAR1(A)
    • B(e);N_GUARD::QAR1(A),XB(e)
    • S(a);N_GUARD::QAB1(A)
    • S(h);N_GUARD::QAB1(A)
    • S(h);N_GUARD::QAB1(A),XS(h)
    • P(c);N_GUARD::S(E)
    • P(f);N_GUARD,SBLOCK::S(D)
    • P(g);N_GUARD::S(E)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • S(a);OGATE,XP(C)::QAB(A),XS(a)
      • P(c);XB(B)::S(D),XP(c)
      • P(c);XQ(A)::S(E),XP(c)
      • B(e);N_GUARD::QAR1(A)
      • B(e);N_GUARD::QAR1(A),XB(e)
      • S(a);N_GUARD::QAB1(A)
      • S(h);N_GUARD::QAB1(A)
      • S(h);N_GUARD::QAB1(A),XS(h)
      • P(c);::QAR1(A)
      • P(f);N_GUARD,SBLOCK::S(D)
      • P(g);N_GUARD::S(E)
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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).