MESON Chess Problem Database

Problem Display
PID: 256870 (KQ6/3NP1pB/3P2q1/3p1n2/3bkr2/7R/2R1Pp1B/1n3N2 w - - 0 1)

Kopaev, Viacheslav Georgievich

Springaren, 1989

KQ6/3NP1pB/3P2q1/3p1n2/3bkr2/7R/2R1Pp1B/1n3N2

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sa3
      • 2.Sd2#
    • 1...Sc3
      • 2.Sd2#
    • 1...Se3
      • 2.Sg3#
  • Tries
    • 1.Re3+?
      • 1...Sxe3
        • 2.Sg3#
      • 1...Bxe3!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qxb1#
      • 1...dxc4
        • 2.Qb7#
      • 1...Se3
        • 2.Sg3#
      • 1...Qe8
        • 2.Re3#
      • 1...Qg3
        • 2.e8Q#
        • 2.e8R#
      • 1...Rf3
        • 2.Sc5#
      • 1...Sd2
        • 2.Sxd2#
      • 1...Sa3
        • 2.Sd2#
      • 1...Sc3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(A),XS(a)
    • S(a);N_GUARD::S(A)
    • S(g);N_GUARD,P_SPINQ(h),SBLOCK::S(A)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(g);P_SPINQ(h),SBLOCK,XR(E)::S(A)
      • Refutation
        • B(c);XR(E)
  • Actual
    • R(B);P_PINB(c)
    • Threat
      • QAB(K),XS(a)
    • Vars
      • P(f);N_SPINB(c),OGATEB,XR(B)::QAB(K)
      • S(g);N_GUARD,P_SPINQ(h),SBLOCK::S(A)
      • Q(h);P_PINQ(K),P_SPINS(g)::R1(E)
      • Q(h);N_GUARD,P_SPINS(g)::P=Q
      • R(e);::S(G)
      • S(a);N_GUARD::S(A),XS(a)
      • S(a);N_GUARD::S(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).