MESON Chess Problem Database

Problem Display
PID: 158404 (7k/8/5Kp1/3B3q/8/7R/8/5Q2 w - - 0 1)

Abrosimov, Viktor Yakovlevich

Kudesnik, 2011

7k/8/5Kp1/3B3q/8/7R/8/5Q2

#2

4 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh3
      • 2.Qxh3#
    • 1...Qh4+
      • 2.Rxh4#
    • 1...Qh6
      • 2.Rxh6#
    • 1...g5
      • 2.Rxh5#
  • Tries
    • 1.Qd3?
      • 1...Qh4+
        • 2.Rxh4#
      • 1...Kh7
        • 2.Rxh5#
      • 1...Qxh3
        • 2.Qxh3#
      • 1...Qh6
        • 2.Rxh6#
      • 1...g5
        • 2.Rxh5#
      • 1...Qh7!
    • 1.Qb1?
      • 1...Qh4+
        • 2.Rxh4#
      • 1...Kh7
        • 2.Rxh5#
      • 1...Qh7
        • 2.Qb8#
      • 1...Qh6
        • 2.Rxh6#
      • 1...g5
        • 2.Rxh5#
      • 1...Qxh3!
    • 1.Qh1?
      • 1...Qh4+
        • 2.Rxh4#
      • 1...Qxh3
        • 2.Qxh3#
      • 1...Qh7
        • 2.Rxh7#
      • 1...Qh6
        • 2.Rxh6#
      • 1...g5
        • 2.Rxh5#
      • 1...Kh7!
  • Keys
    • 1.Qf5!
      • 1...Qh4+
        • 2.Rxh4#
      • 1...Kh7
        • 2.Rxh5#
      • 1...Qxh3
        • 2.Qxh3#
      • 1...gxf5
        • 2.Rxh5#
      • 1...Qh7
        • 2.Qc8#
      • 1...Qh6
        • 2.Rxh6#
      • 1...g5
        • 2.Rxh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_SPINQ(a),OGATE,XR(B)::QAR(A),XQ(a)
    • Q(a);CHECK,OGATEB::R(B),XQ(a)
    • Q(a);OGATE::R(B),XQ(a)
    • P(b);N_GUARD::R(B),XQ(a)
  • Tries
    • Try
      • Q(A);
      • Vars
        • Q(a);CHECK,OGATEB::R(B),XQ(a)
        • K(c);P-FLIGHT,P_SPINP(b)::R(B),XQ(a)
        • Q(a);N_SPINQ(a),OGATE,XR(B)::QAR(A),XQ(a)
        • Q(a);OGATE::R(B),XQ(a)
        • P(b);N_GUARD::R(B),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • Q(A);
      • Vars
        • Q(a);CHECK,OGATEB::R(B),XQ(a)
        • K(c);P-FLIGHT,P_SPINP(b)::R(B),XQ(a)
        • Q(a);::QAR(A)
        • Q(a);OGATE::R(B),XQ(a)
        • P(b);N_GUARD::R(B),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XR(B)
    • Try
      • Q(A);
      • Vars
        • Q(a);CHECK,OGATEB::R(B),XQ(a)
        • Q(a);OGATE,XR(B)::QAR(A),XQ(a)
        • Q(a);OGATE::R1(B),XQ(a)
        • Q(a);OGATE::R(B),XQ(a)
        • P(b);N_GUARD::R(B),XQ(a)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • Q(a);CHECK,OGATEB::R(B),XQ(a)
      • K(c);P-FLIGHT,P_SPINP(b)::R(B),XQ(a)
      • Q(a);N_SPINQ(a),OGATE,XR(B)::QAR(A),XQ(a)
      • P(b);N_GUARD,XQ(A)::R(B),XQ(a)
      • Q(a);::QAR(A)
      • Q(a);OGATE::R(B),XQ(a)
      • P(b);N_GUARD::R(B),XQ(a)
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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).