MESON Chess Problem Database

Problem Display
PID: 160089 (8/Kb6/8/kB6/8/3Q4/1rN5/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Sa ogneupory, 1987

8/Kb6/8/kB6/8/3Q4/1rN5/8

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Qa3#
  • Tries
    • 1.Qd2+?
      • 1...Rb4
        • 2.Qxb4#
      • 1...Kxb5!
    • 1.Qb3?
      • threat
        • 2.Qa4#
      • 1...Ra2
        • 2.Qb4#
      • 1...Rxb3!
    • 1.Qc3+?
      • 1...Rb4
        • 2.Qxb4#
      • 1...Kxb5!
    • 1.Qd4?
      • threat
        • 2.Qb6#
        • 2.Qa4#
      • 1...Rxc2
        • 2.Qa4#
      • 1...Rxb5
        • 2.Qa1#
      • 1...Ra2
        • 2.Qb6#
        • 2.Qb4#
      • 1...Rb4
        • 2.Qb6#
        • 2.Qxb4#
      • 1...Kxb5!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qa4#
      • 1...Rxb5
        • 2.Qa2#
      • 1...Ra2
        • 2.Qb4#
      • 1...Rb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK,XB(C)::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(B),XR(a)
      • Refutation
        • K(b);P-FLIGHT,XB(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(a);N_GUARD::QAB1(B)
      • Refutation
        • R(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(B),XR(a)
      • Refutation
        • K(b);P-FLIGHT,XB(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XS(A)::QAR1(B)
        • R(a);OGATE,SBLOCK,XB(C)::QAR(B)
      • Refutation
        • K(b);P-FLIGHT,XB(C)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • R(a);N_GUARD,SBLOCK,XB(C)::QAR(B)
      • R(a);N_GUARD::QAB1(B)
      • R(a);N_GUARD::QAB1(B),XR(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).