MESON Chess Problem Database

Problem Display
PID: 177494 (2r5/Rp1N1Q1b/1PBkP1p1/2p1N3/6R1/5K2/8/8 w - - 0 1)

Shanshin, Valery Yurevich

Best Problems, 2018

2r5/Rp1N1Q1b/1PBkP1p1/2p1N3/6R1/5K2/8/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Rd4#
  • Tries
    • 1.Bxb7?
      • threat
        • 2.Sc4#
      • 1...c4
        • 2.Rd4#
      • 1...Rc6!
    • 1.Ra3?
      • threat
        • 2.Rd3#
      • 1...c4
        • 2.Rd4#
      • 1...g5!
    • 1.Qf8+?
      • 1...Kxe6
        • 2.Qf6#
      • 1...Rxf8+!
  • Keys
    • 1.e7!
      • threat
        • 2.Qf6#
      • 1...Rxc6
        • 2.e8S#
      • 1...bxc6
        • 2.Sc4#
      • 1...Rf8
        • 2.exf8Q#
        • 2.exf8B#
      • 1...Bg8
        • 2.Rxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);N_GUARD::R(B)
  • Tries
    • Try
      • B(E);XP(d)
      • Threat
        • S(C)
      • Vars
        • P(a);N_GUARD::R(B)
      • Refutation
        • R(f);
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • P(a);N_GUARD::R(B)
      • Refutation
        • P(c);
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(F)::QAR1(I)
      • Refutation
        • R(f);CHECK,XQ(I)
  • Actual
    • P(F);
    • Threat
      • QAR2(I)
    • Vars
      • R(f);N_GUARD,XB(E)::P=S
      • P(d);SBLOCK,XB(E)::S(C)
      • R(f);OGATE,P_PINQ(I)::PXR(f)=Q
      • B(e);N_GUARD::R(B),XP(c)
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).