MESON Chess Problem Database

Problem Display
PID: 192971 (8/2K5/4p3/p1k5/P7/pB6/1nP5/1Q1RB3 w - - 0 1)

Lider, Valentin Viktorovich

Schweizerische Schachzeitung, 1984

8/2K5/4p3/p1k5/P7/pB6/1nP5/1Q1RB3

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Rd5#
  • Tries
    • 1.Bxe6?
      • 1...Sxd1
        • 2.Qb6#
      • 1...Sxa4
        • 2.Bf2#
      • 1...Sd3
        • 2.Qb6#
      • 1...Sc4
        • 2.Rd5#
        • 2.Qb5#
      • 1...a2!
    • 1.Qa1?
      • threat
        • 2.Qxa3#
      • 1...Sxd1
        • 2.Qe5#
      • 1...Sxa4
        • 2.Qe5#
      • 1...Sd3
        • 2.Qc3#
      • 1...Sc4
        • 2.Qd4#
      • 1...a2!
    • 1.Qxb2?
      • threat
        • 2.Qxa3#
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qe5#
      • 1...a2
        • 2.Qa3#
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qe5#
      • 1...e5
        • 2.Rd5#
        • 2.Qxa3#
        • 2.Qc3#
        • 2.Qxe5#
      • 1...axb2!
  • Keys
    • 1.Ba2!
      • 1...Sxd1
        • 2.Qb6#
      • 1...Sxa4
        • 2.Bf2#
      • 1...Sd3
        • 2.Qb6#
      • 1...Sc4
        • 2.Qb5#
      • 1...e5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD::R1(B)
  • Tries
    • Try
      • B(E);XP(e)
      • Vars
        • S(a);OGATE,XR(B)::QAB1(A)
        • S(a);XP(F)::B(C)
        • S(a);OGATE::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(b)
      • Vars
        • S(a);OGATE,XR(B)::QAR2(A)
        • S(a);OGATE,XP(F)::QAR2(A)
        • S(a);OGATE::QAR2(A)
        • S(a);OGATE::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(4)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • B(E);
    • Vars
      • S(a);OGATE,XR(B)::QAB1(A)
      • S(a);XP(F)::B(C)
      • S(a);OGATE::QAB1(A)
      • S(a);OGATE::QAR1(A)
      • P(e);N_GUARD::R1(B)
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).