MESON Chess Problem Database

Problem Display
PID: 271680 (6R1/7q/1b3B1p/3BNk2/8/Q2P4/3P1N1r/1K3R2 w - - 0 1)

Shanshin, Valery Yurevich

3rd Prize, Ryazansky Komsomolets, 1983

6R1/7q/1b3B1p/3BNk2/8/Q2P4/3P1N1r/1K3R2

#2

10 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sh3#
    • 1...Kxf6
      • 2.Sfg4#
  • Tries
    • 1.Be4+?
      • 1...Kf4
        • 2.Sh3#
        • 2.Rg4#
      • 1...Kxf6
        • 2.Qd6#
      • 1...Ke6!
    • 1.Rg5+?
      • 1...Kf4
        • 2.Sh3#
      • 1...Kxf6
        • 2.Se4#
      • 1...hxg5!
  • Keys
    • 1.d4!
      • threat
        • 2.Qf3#
      • 1...Kf4+
        • 2.Sfd3#
      • 1...Kxf6+
        • 2.Se4#
      • 1...Rxf2
        • 2.Rxf2#
      • 1...Rh3
        • 2.Sxh3#
      • 1...Rh4
        • 2.Sfg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_PINP(F)::R(B)+S(D),DCHECK
    • K(b);P-FLIGHT,P_PINP(F),XB(I)::R(B)+S(D),DCHECK
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT,XB(I)::QAR2(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(J);CHECK
      • Vars
        • K(b);P-FLIGHT,P_PINP(F)::R(B)+S(D),DCHECK
        • K(b);P-FLIGHT,P_PINP(F),XB(I)::R(B)+S(D),DCHECK
      • Refutation
        • P(d);XR(J)
  • Actual
    • P(F);
    • Threat
      • QAR2(E)
    • Vars
      • K(b);CHECK,P-FLIGHT::R(B)+S(D),DCHECK
      • K(b);CHECK,P-FLIGHT,XB(I)::R(B)+S(D),DCHECK
      • R(a);OGATE,P_SPINR(a),XS(D)::R(B),XR(a)
      • R(a);N_GUARD::R(B)+S(D),XR(a)
      • R(a);N_GUARD::R(B)+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).