MESON Chess Problem Database

Problem Display
PID: 164528 (2K1N3/8/kp6/q7/R7/8/8/Q7 w - - 0 1)

Surkov, Valery Albertovich

Sachmatija, 2007

2K1N3/8/kp6/q7/R7/8/8/Q7

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Qxa4#
  • Tries
    • 1.Kb8?
      • threat
        • 2.Sc7#
      • 1...Qxa4
        • 2.Qxa4#
      • 1...b5
        • 2.Qf6#
      • 1...Kb5!
  • Keys
    • 1.Qd4!
      • 1...Kb5
        • 2.Qc4#
      • 1...Ka7
        • 2.Rxa5#
      • 1...Qxa4
        • 2.Qxa4#
      • 1...b5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,XR(B)::QAR2(A),XQ(a)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • S(D)
      • Vars
        • Q(a);OGATE,XR(B)::QAR2(A),XQ(a)
        • P(c);OGATEB,SBLOCK::QAR(A)
      • Refutation
        • K(b);N_SPINQ(a),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINQ(a),S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT,P_SPINP(c)::R(B),XQ(a)
      • Q(a);N_SPINQ(a),OGATE,XR(B)::QAR2(A),XQ(a)
      • P(c);::S(D)
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).