MESON Chess Problem Database

Problem Display
PID: 255068 (3N3B/n4R2/3p4/3kP3/n1pbN3/4p3/6Q1/1b1RK3 w - - 0 1)

Viksna, Kristaps

Comm., Schach, 1986

3N3B/n4R2/3p4/3kP3/n1pbN3/4p3/6Q1/1b1RK3

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Sc3#
    • 1...dxe5
      • 2.Rd7#
  • Tries
    • 1.Sf6+?
      • 1...Kxe5
        • 2.Sg4#
        • 2.Sd5#
        • 2.Sh5#
        • 2.Sd7#
        • 2.Sh7#
        • 2.Se8#
        • 2.Sg8#
      • 1...Kc5!
    • 1.Rf4?
      • threat
        • 2.Qg8#
      • 1...Sc5
        • 2.Sc3#
      • 1...Bxe4!
    • 1.Rc7?
      • threat
        • 2.Sc3#
      • 1...Bxe4
        • 2.Qg8#
      • 1...dxe5
        • 2.Rd7#
      • 1...Sc3
        • 2.Sxc3#
      • 1...c3
        • 2.Sxc3#
      • 1...Sc6!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Rf4#
      • 1...Kxe4
        • 2.Qg2#
      • 1...Bxe4
        • 2.Rc7#
      • 1...Sc5
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(c);SBLOCK::QAB(C)+S(D),DCHECK
    • P(g);OGATEB,XP(E)::R(F)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(f);N_SPINB(e),P-FLIGHT
    • Try
      • R(F);
      • Threat
        • QAB(C)
      • Vars
        • S(c);SBLOCK::QAB(C)+S(D),DCHECK
      • Refutation
        • B(a);XS(D)
    • Try
      • R(F);
      • Threat
        • QAB(C)+S(D),DCHECK
      • Vars
        • B(a);SBLOCK,XS(D)::QAB(C)
        • P(g);OGATEB,XP(E)::R(F)
        • S(c);::QAB(C)+S(D),DCHECK,XS(c)
        • P(d);::QAB(C)+S(D),DCHECK,XP(d)
      • Refutation
        • S(h);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(F)
    • Vars
      • K(f);N_SPINB(e),OGATEB,S_FLIGHT,XS(D)::QAB(C)
      • B(a);SBLOCK,XS(D)::QAB(C)+R(F)
      • S(c);N_GUARD,SBLOCK::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).