MESON Chess Problem Database

Problem Display
PID: 67186 (3Q4/2p4n/2PNp2P/1pPpkp2/1K3p2/4pB2/4P3/8 w - - 0 1)

Antonov, Yuri Mikhailovich

Chernyavsky, Mykola Vasilovich

3rd Comm., Sachove umeni (Ceskoslovensky sach), 1978

3Q4/2p4n/2PNp2P/1pPpkp2/1K3p2/4pB2/4P3/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Qh8#
    • 1...d4
      • 2.Sf7#
  • Tries
    • 1.Sxb5?
      • 1...Sg5
        • 2.Qh8#
      • 1...Sf6
        • 2.Qxc7#
      • 1...d4
        • 2.Qxd4#
      • 1...Sf8!
    • 1.Se8?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sg5
        • 2.Qf6#
      • 1...Sf8
        • 2.Qf6#
      • 1...d4
        • 2.Qxc7#
      • 1...Kd4!
  • Keys
    • 1.Qxc7!
      • 1...Kd4
        • 2.Sxb5#
      • 1...Kf6
        • 2.Qg7#
      • 1...Sf6
        • 2.Sxb5#
      • 1...Sg5
        • 2.Qg7#
      • 1...Sf8
        • 2.Qg7#
      • 1...d4
        • 2.Se8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(i);N_GUARD::QAB(H)
    • P(d);::S(F)
  • Tries
    • Try
      • S(F);XP(c)
      • Vars
        • S(i);N_GUARD::QAB(H)
        • S(i);SBLOCK::QAB(H),XP(h)
        • P(d);OGATE::QAB1(H),XP(d)
      • Refutation
        • S(i);
    • Try
      • S(F);
      • Vars
        • S(i);N_GUARD::QAB1(H),XS(i)
        • S(i);N_GUARD::QAB1(H)
        • P(d);SBLOCK::QAB(H),XP(h)
      • Refutation
        • K(e);P_SPINP(d),S_FLIGHT
  • Actual
    • Q(H);XP(h)
    • Vars
      • K(e);S_FLIGHT::S(F),XP(c)
      • K(e);S_FLIGHT::QAB1(H)
      • S(i);SBLOCK::QAB(H)+S(F),XP(c)
      • S(i);N_GUARD::QAB(H)
      • P(d);SBLOCK::QAB(H)+S(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).