MESON Chess Problem Database

Problem Display
PID: 157282 (r3r3/8/n1N1p3/QB3p2/8/3PkpP1/3R1p2/KN6 w - - 0 1)

Perone, D

Best Problems, 2008

r3r3/8/n1N1p3/QB3p2/8/3PkpP1/3R1p2/KN6

#2

8 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Ba4?
      • threat
        • 2.Qe5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e5!
    • 1.Bxa6?
      • threat
        • 2.Qb6#
        • 2.Qc5#
        • 2.Qe5#
      • 1...Rab8
        • 2.Qc5#
        • 2.Qe5#
      • 1...Rad8
        • 2.Qe5#
      • 1...Reb8
        • 2.Qc5#
        • 2.Qe5#
      • 1...Red8
        • 2.Qe5#
      • 1...e5
        • 2.Qb6#
        • 2.Qc5#
      • 1...Rxa6!
  • Keys
    • 1.Ra2!
      • threat
        • 2.Qd2#
      • 1...f1S
        • 2.Qe1#
      • 1...Sb4
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(G);
      • Threat
        • QAR2(F)
      • Vars
        • S(e);N_GUARD::QAB(F),XS(e)
      • Refutation
        • P(f);
    • Try
      • B(G);XS(e)
      • Threat
        • DUALS(3)
      • Vars
        • R(g);::QAR2(F)
        • R(h);::QAR2(F)
      • Refutation
        • R(g);P_PINQ(F),XB(G)
  • Actual
    • R(C);
    • Threat
      • QAB1(F)
    • Vars
      • P(a);N_GUARD::QAR2(F)
      • S(e);N_GUARD::QAB(F)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).