MESON Chess Problem Database

Problem Display
PID: 259682 (b4N2/6K1/4Rppr/Q2q2k1/7p/8/8/3B1R2 w - - 0 1)

Pirrone, Santi

Scacchi e Scienze Applicate, 1987

b4N2/6K1/4Rppr/Q2q2k1/7p/8/8/3B1R2

#2

6 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Qd2#
    • 1...Rh7+
      • 2.Sxh7#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Se6#
      • 1...Rh7+
        • 2.Sxh7#
      • 1...f5
        • 2.Qd8#
      • 1...h3!
    • 1.Rexf6?
      • threat
        • 2.Se6#
        • 2.Rg1#
      • 1...Rh7+
        • 2.Sxh7#
      • 1...Qxa5
        • 2.Se6#
      • 1...Qb5
        • 2.Se6#
        • 2.Qd2#
      • 1...Qc5
        • 2.Se6#
      • 1...Qe5
        • 2.Se6#
        • 2.Qxe5#
      • 1...Qf5
        • 2.Se6#
      • 1...h3!
    • 1.Qxd5+?
      • 1...f5
        • 2.Qd8#
      • 1...Bxd5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Se6#
      • 1...Rh7+
        • 2.Sxh7#
      • 1...f5
        • 2.Rg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::QAB(C)
    • R(f);CHECK,N_GUARD::S(F),XR(f)
  • Tries
    • Try
      • R(D);
      • Threat
        • S(F)
      • Vars
        • R(f);CHECK,N_GUARD::S(F),XR(f)
        • P(d);N_SPINQ(b),OGATEB::QAB(C)
      • Refutation
        • P(a);
    • Try
      • R(D);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,N_GUARD::S(F),XR(f)
        • Q(b);N_SPINQ(b),XQ(C)::S(F)
        • Q(b);::S(F)
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK,XQ(b)
      • Vars
        • P(d);OGATEB,P_SPINP(d)::QAB(C)
      • Refutation
        • B(g);XQ(C)
  • Actual
    • R(D);
    • Threat
      • S(F)
    • Vars
      • R(f);CHECK,N_GUARD::S(F),XR(f)
      • P(d);N_SPINQ(b),SBLOCK::R(B)
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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).