MESON Chess Problem Database

Problem Display
PID: 56349 (b1N4K/R2p1pQ1/n1kP4/3p4/7p/B1q5/2R5/4bB2 w - - 0 1)

Brogi, Giuseppe

Themes-64, 1960

b1N4K/R2p1pQ1/n1kP4/3p4/7p/B1q5/2R5/4bB2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Rc7#
    • 1...Sc5
      • 2.Rc7#
    • 1...Sc7
      • 2.Rxc7#
    • 1...Sb8
      • 2.Rc7#
    • 1...d4
      • 2.Qg2#
    • 1...f6
      • 2.Qxd7#
  • Tries
    • 1.Bxa6?
      • threat
        • 2.Rc7#
      • 1...d4
        • 2.Qg2#
      • 1...Bb7!
    • 1.Rxc3+?
      • 1...Sc5
        • 2.Rxc5#
        • 2.Rc7#
      • 1...Bxc3!
    • 1.Qxc3+?
      • 1...Sc5
        • 2.Rc7#
        • 2.Qxc5#
      • 1...Bxc3+!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Se7#
      • 1...Qc4
        • 2.Qb6#
      • 1...Qc5
        • 2.Qa4#
      • 1...Sb4
        • 2.Rc7#
      • 1...Sc5
        • 2.Rc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(e);N_GUARD::R1(E)
    • S(e);N_GUARD,N_SPINQ(b)::R1(E)
    • S(e);N_GUARD::R1(E),XS(e)
    • P(d);N_PINQ(F)::QAB(F)
    • P(h);N_PINQ(F)::QAB1(F),XP(g)
  • Tries
    • Try
      • B(A);XS(e)
      • Threat
        • R1(E)
      • Vars
        • P(d);N_PINQ(F)::QAB(F)
      • Refutation
        • B(i);
    • Try
      • R(B);CHECK,N_SPINQ(F),XQ(b)
      • Refutation
        • B(a);P_PINQ(F),XR(B)
    • Try
      • Q(F);CHECK,N_SPINQ(F),XQ(b)
      • Refutation
        • B(a);CHECK,P_SPINB(a),XQ(F)
  • Actual
    • Q(F);
    • Threat
      • S(G)
    • Vars
      • Q(b);N_PINQ(F)::QAR1(F)
      • Q(b);N_PINQ(F)::QAB(F)
      • S(e);N_GUARD::R1(E)
      • S(e);N_GUARD,N_SPINQ(b)::R1(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).