MESON Chess Problem Database

Problem Display
PID: 137900 (6BB/pR2N3/Rb1k4/1q4p1/1P4N1/1n1nQ3/3pp1p1/5bK1 w - - 0 1)

Ellerman, Arnoldo

Eskilstuna Kuriren, 1921

6BB/pR2N3/Rb1k4/1q4p1/1P4N1/1n1nQ3/3pp1p1/5bK1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sf5#
    • 1...Sbc5
      • 2.Qd4#
    • 1...Sf2
      • 2.Qe6#
    • 1...Sdc5
      • 2.Be5#
      • 2.Qg3#
      • 2.Qe5#
  • Tries
    • 1.Raxb6+?
      • 1...Qc6
        • 2.Sf5#
        • 2.Sc8#
        • 2.Rxc6#
        • 2.Qe6#
      • 1...axb6
        • 2.Qe6#
      • 1...Qxb6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Se4#
      • 1...Qxb4
        • 2.Se8#
        • 2.Rd7#
      • 1...Qc4
        • 2.Se8#
        • 2.Rd7#
      • 1...Qc6
        • 2.Sf5#
      • 1...Qd7
        • 2.Rxd7#
      • 1...Qd5
        • 2.Se8#
        • 2.Rd7#
      • 1...Qe5
        • 2.Se8#
        • 2.Rd7#
      • 1...Qf5
        • 2.Se8#
      • 1...Sbc5
        • 2.Qd4#
      • 1...Sf2
        • 2.Qe6#
      • 1...Sdc5
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(g);N_GUARD,N_SPINB(i),SBLOCK::S(G)
    • S(e);N_GUARD,N_PINQ(B),S_CUTQ(g)::QAR2(B)
    • S(f);N_PINQ(B)::QAR1(B)
  • Tries
    • Try
      • R(E);CHECK,N_SPINQ(B),XB(i)
      • Vars
        • P(k);XR(E)::QAR1(B)
      • Refutation
        • Q(g);P_PINQ(B),XR(E)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • Q(g);N_GUARD,N_SPINB(i),SBLOCK::S(G)
      • Q(g);N_GUARD::R1(F),XQ(g)
      • Q(g);N_GUARD::S(D)
      • S(e);N_GUARD,N_PINQ(B),S_CUTQ(g)::QAR2(B)
      • S(f);N_PINQ(B)::QAR1(B)
      • S(f);N_PINQ(B)::QAB(B)
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).