MESON Chess Problem Database

Problem Display
PID: 159231 (5kb1/K1R2q1R/2Q5/8/8/8/8/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Sa ogneupory, 1986

5kb1/K1R2q1R/2Q5/8/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Rc8#
    • 1...Qc4
      • 2.Rc8#
      • 2.Qa8#
    • 1...Qe8
      • 2.Qh6#
    • 1...Qf1
      • 2.Rc8#
      • 2.Qa8#
    • 1...Qf3
      • 2.Rc8#
    • 1...Qf4
      • 2.Rc8#
      • 2.Qa8#
    • 1...Qg7
      • 2.Qa8#
    • 1...Qxh7
      • 2.Qa8#
  • Tries
    • 1.Qc5+?
      • 1...Qe7
        • 2.Qxe7#
      • 1...Ke8!
    • 1.Qd6+?
      • 1...Qe7
        • 2.Qxe7#
      • 1...Ke8!
  • Keys
    • 1.Qf3!
      • 1...Ke8
        • 2.Qa8#
      • 1...Qxf3
        • 2.Rc8#
      • 1...Bxh7
        • 2.Qxf7#
      • 1...Qf4
        • 2.Rc8#
        • 2.Qa8#
      • 1...Qf5
        • 2.Rc8#
      • 1...Qf6
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_PINR(C)::R(C)
    • Q(a);N_GUARD,N_PINR(C),SBLOCK::QAB(A)
    • Q(a);N_GUARD::QAR(A)
    • Q(a);N_GUARD,XR(D)::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(A),XQ(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(A),XQ(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);P_PINQ(a)
    • Vars
      • K(b);N_SPINQ(a),P-FLIGHT::QAR(A)
      • Q(a);N_PINR(C),N_SPINQ(a),XQ(A)::R(C)
      • B(c);N_GUARD,XR(D)::QAR1(A),XQ(a)
      • Q(a);N_PINR(C)::R(C)
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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).