MESON Chess Problem Database

Problem Display
PID: 166439 (8/1N6/3p4/1p2NP2/1k3P1Q/2p4P/1P6/3BK3 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Kapustin, Fedor Mikhailovich

Sachove umeni (Ceskoslovensky sach), 2016

8/1N6/3p4/1p2NP2/1k3P1Q/2p4P/1P6/3BK3

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...dxe5
      • 2.fxe5#
    • 1...d5
      • 2.Qe7#
  • Tries
    • 1.Bc2?
      • 1...dxe5
        • 2.fxe5#
      • 1...d5
        • 2.Qe7#
      • 1...cxb2!
    • 1.Qf2?
      • threat
        • 2.Qd4#
      • 1...cxb2
        • 2.Qxb2#
      • 1...dxe5
        • 2.Qc5#
      • 1...c2!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxc3#
      • 1...cxb2
        • 2.Qb3#
      • 1...c2
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(d);OGATE,XS(G)::QAR(F)+P(E),XP(d)
    • P(d);OGATEB::QAB(F)
  • Tries
    • Try
      • B(A);
      • Vars
        • P(d);OGATE,XS(G)::QAR(F)+P(E),XP(d)
        • P(d);OGATEB::QAB(F)
      • Refutation
        • P(a);XP(C)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • P(a);OGATE,XP(C)::QAR2(F),XP(a)
        • P(d);N_GUARD,XS(G)::QAB1(F)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Threat
      • QAB1(F),XP(a)
    • Vars
      • P(a);OGATE,XP(C)::QAR1(F)
      • P(a);OGATE::QAB1(F)
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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).