MESON Chess Problem Database

Problem Display
PID: 205842 (4K1n1/B3Qp2/3p4/r1NN4/1p1k2r1/1B1p3q/8/2R5 w - - 0 1)

Klein, Max

Troll, 2019

4K1n1/B3Qp2/3p4/r1NN4/1p1k2r1/1B1p3q/8/2R5

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qe3#
    • 1...Qg2
      • 2.Qe3#
    • 1...Qh1
      • 2.Qe3#
    • 1...Qh2
      • 2.Qe3#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qh4
      • 2.Qe3#
    • 1...Qh5
      • 2.Qe3#
    • 1...Qh7
      • 2.Qe3#
    • 1...Qh8
      • 2.Qe3#
    • 1...Rg1
      • 2.Qe4#
    • 1...Rg2
      • 2.Qe4#
    • 1...Rg3
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rg5
      • 2.Qe4#
    • 1...Rg6
      • 2.Qe4#
    • 1...Rg7
      • 2.Qe4#
    • 1...Ra1
      • 2.Sa4#
      • 2.Sa6#
    • 1...Ra2
      • 2.Sa4#
      • 2.Sa6#
    • 1...Ra3
      • 2.Sa4#
      • 2.Sa6#
    • 1...Ra4
      • 2.Sxa4#
      • 2.Sa6#
    • 1...Ra6
      • 2.Sxa6#
    • 1...Sf6+
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qf6#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Rc4#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...fxe6!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Rc4#
      • 1...Qe3+
        • 2.Se7#
      • 1...Re4+
        • 2.Se6#
      • 1...Sf6+
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 16
  • Sets
    • Q(b);N_GUARD::QAB1(F)
    • Q(b);N_GUARD,P_PINQ(F)::QAB1(F),XQ(b)
    • R(e);N_GUARD::QAR1(F)
    • R(e);N_GUARD,P_PINQ(F)::QAR1(F),XR(e)
    • R(f);N_GUARD::B(E)+S(C),XR(f)
    • S(i);CHECK,N_GUARD::QAB(F),XS(i)
    • S(i);N_GUARD::QAB(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • R1(A)
      • Vars
        • S(i);CHECK,N_GUARD::QAB(F),XS(i)
      • Refutation
        • P(h);XQ(F)
  • Actual
    • Q(F);XP(g)
    • Threat
      • R1(A)
    • Vars
      • Q(b);CHECK,SBLOCK::QAR(F)+S(D)
      • R(e);CHECK,SBLOCK::B(E)+S(C),DCHECK
      • S(i);CHECK,N_GUARD::QAB(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).