MESON Chess Problem Database

Problem Display
PID: 157983 (4Q3/2R5/4Kb2/8/4k3/3n1p2/4bP2/1B6 w - - 0 1)

Abdullayev, Elmar

Shakhmatnaya kompozitsiya, 2013

4Q3/2R5/4Kb2/8/4k3/3n1p2/4bP2/1B6

#2

5 + 5

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Rc4#
      • 2.Qa4#
    • 1...Bg5
      • 2.Rc4#
      • 2.Qa4#
    • 1...Be7
      • 2.Rc4#
    • 1...Bd8
      • 2.Rc4#
      • 2.Qa4#
  • Tries
    • 1.Qc6+?
      • 1...Kd4
        • 2.Rd7#
        • 2.Qd5#
        • 2.Qc4#
      • 1...Kf4!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd4!
    • 1.Qa8+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qg4#
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bg5
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(e);N_GUARD::R(D)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • K(d);N_SPINS(b),P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);N_SPINS(b),P-FLIGHT::QAR1(E)
      • Refutation
        • K(d);N_SPINS(b),P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);N_SPINS(b),P-FLIGHT::QAR1(E)
      • Refutation
        • K(d);N_SPINS(b),P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(d);N_SPINS(b),P-FLIGHT::QAR1(E)
      • B(e);N_GUARD::QAR1(E),XB(e)
      • B(e);N_GUARD::R(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).