MESON Chess Problem Database

Problem Display
PID: 180354 (8/8/3ppN2/pK1p2R1/1n1k2PQ/r3N3/3P4/1B6 w - - 0 1)

Lider, Valentin Viktorovich

Scacchi e Scienze Applicate, 1985

8/8/3ppN2/pK1p2R1/1n1k2PQ/r3N3/3P4/1B6

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sc2#
    • 1...e5
      • 2.Sf5#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qf4#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Sd3
        • 2.Sc2#
      • 1...e5
        • 2.Sf5#
      • 1...Sc2!
    • 1.Qh7?
      • threat
        • 2.Qa7#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sd3
        • 2.Sc2#
      • 1...Sa6
        • 2.Sc2#
      • 1...Sc6
        • 2.Sc2#
      • 1...Rc3!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qf4#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sd3
        • 2.Sc2#
      • 1...e5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,SBLOCK::S(C)
    • P(g);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • R(a);OGATE,P_SPINR(a),XS(C)::QAB1(E),XR(a)
        • S(b);SBLOCK::QAB(E)+S(C),DCHECK
        • P(g);SBLOCK::QAB(E)+S(C),DCHECK
      • Refutation
        • S(b);
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • S(b);N_GUARD::S(C),XS(b)
        • S(b);N_GUARD::S(C)
      • Refutation
        • R(a);
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • R(a);OGATE,XS(C)::QAB1(E),XR(a)
      • S(b);N_GUARD::S(C),XS(b)
      • S(b);N_GUARD::S(C)
      • P(g);N_GUARD::S(C)
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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).