MESON Chess Problem Database

Problem Display
PID: 161161 (8/8/8/7p/5Qpk/8/Rb4K1/8 w - - 0 1)

Djurasevic, Branislav

Prioskaya Pravda, 1993

8/8/8/7p/5Qpk/8/Rb4K1/8

#2

3 + 4

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qf6#
    • 1...Bf6
      • 2.Qxf6#
  • Tries
    • 1.Kf1?
      • 1...Ba1
        • 2.Rh2#
      • 1...Bc1
        • 2.Rh2#
      • 1...Ba3
        • 2.Rh2#
      • 1...Bc3
        • 2.Rh2#
      • 1...Bd4
        • 2.Rh2#
      • 1...Be5
        • 2.Rh2#
      • 1...Bf6
        • 2.Rh2#
      • 1...Bg7
        • 2.Rh2#
      • 1...Bh8
        • 2.Rh2#
      • 1...Kh3!
    • 1.Kg1?
      • 1...Kh3
        • 2.Qh2#
      • 1...Ba1
        • 2.Rh2#
      • 1...Bc1
        • 2.Rh2#
      • 1...Ba3
        • 2.Rh2#
      • 1...Bc3
        • 2.Rh2#
      • 1...Be5
        • 2.Rh2#
      • 1...Bf6
        • 2.Rh2#
      • 1...Bg7
        • 2.Rh2#
      • 1...Bh8
        • 2.Rh2#
      • 1...Bd4+!
    • 1.Ra3?
      • threat
        • 2.Rh3#
      • 1...Bxa3
        • 2.Qf6#
      • 1...Bc3!
    • 1.Ra5?
      • threat
        • 2.Qh2#
        • 2.Qg3#
        • 2.Qg5#
      • 1...Bc1
        • 2.Qh2#
        • 2.Qg3#
      • 1...Bf6
        • 2.Qh2#
        • 2.Qg3#
        • 2.Qxf6#
      • 1...Be5!
    • 1.Qf2+?
      • 1...g3
        • 2.Qxg3#
        • 2.Qf4#
      • 1...Kg5!
  • Keys
    • 1.Kh1!
      • 1...Kh3
        • 2.Qh2#
      • 1...Ba1
        • 2.Rh2#
      • 1...Bc1
        • 2.Rh2#
      • 1...Ba3
        • 2.Rh2#
      • 1...Bc3
        • 2.Rh2#
      • 1...Bd4
        • 2.Rh2#
      • 1...Be5
        • 2.Rh2#
      • 1...Bf6
        • 2.Rh2#
      • 1...Bg7
        • 2.Rh2#
      • 1...Bh8
        • 2.Rh2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(C)
    • B(a);N_GUARD::QAB(C),XB(a)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • B(a);OGATE::R(A)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(C)
        • B(a);OGATE::R(A)
      • Refutation
        • B(a);CHECK
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • B(a);N_GUARD,XR(A)::QAB(C)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • K(c);N_SPINP(b),P-FLIGHT::QAR1(C)
      • B(a);OGATE::R(A)
HTML5 logo

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).