Problem Display
PID: 238181 (8/3p2R1/2Nk4/8/2K5/8/Q5B1/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

ChessStar, 2009

8/3p2R1/2Nk4/8/2K5/8/Q5B1/8

#2

5 + 2


15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Tries
    • 1.Qb1?
      • 1...Ke6
        • 2.Qg6#
      • 1...Kc7
        • 2.Qb8#
      • 1...dxc6!
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...dxc6
        • 2.Qf6#
      • 1...Kc7!
    • 1.Qe2?
      • threat
        • 2.Qe5#
      • 1...dxc6
        • 2.Qe7#
      • 1...Kc7!
    • 1.Qf2?
      • 1...Ke6
        • 2.Rg6#
      • 1...dxc6
        • 2.Qf6#
      • 1...Kc7!
    • 1.Qa5?
      • threat
        • 2.Rg6#
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...dxc6!
    • 1.Qa7?
      • threat
        • 2.Rg6#
        • 2.Qxd7#
      • 1...dxc6
        • 2.Qe7#
      • 1...Ke6!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kc7
        • 2.Qb8#
      • 1...dxc6
        • 2.Qf6#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(A)
      • Refutation
        • P(b);XS(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);XS(D)::QAR2(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(b);XS(D)::QAB1(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::R(E)
        • P(b);XS(D)::QAR2(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE,XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);P_SPINP(b),S_FLIGHT::QAB1(A)
      • P(b);XS(D)::QAR2(A)


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).