MESON Chess Problem Database

Problem Display
PID: 100498 (8/3N4/8/2R5/1p1kpB2/1Pn5/1n6/Q1N2K2 w - - 0 1)

Zappas, Byron

Israel Ring Ty., 1964

8/3N4/8/2R5/1p1kpB2/1Pn5/1n6/Q1N2K2

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Se2#
    • 1...Sd5
      • 2.Rc4#
  • Tries
    • 1.Qa6?
      • threat
        • 2.Qf6#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Se2#
      • 1...e3!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qh8#
      • 1...Sd3
        • 2.Rc4#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...e3
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);P_SPINS(b),SBLOCK::S(B)
    • S(b);P_SPINS(a),SBLOCK::R1(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
        • S(b);N_GUARD::S(B)
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • S(a);N_GUARD::R1(F)
      • S(a);N_GUARD::R1(F),XS(a)
      • S(b);N_GUARD::QAR1(A),XS(b)
      • P(e);SBLOCK::B(E)
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).