MESON Chess Problem Database

Problem Display
PID: 88750 (K7/6BB/8/8/3p4/8/Pb1P2Q1/k1N4R w - - 0 1)

Lider, Valentin Viktorovich

Problemista, 1972

K7/6BB/8/8/3p4/8/Pb1P2Q1/k1N4R

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bxd4?
      • 1...Bc3
        • 2.Bxc3#
      • 1...Bxd4!
    • 1.Qd5?
      • 1...Bxc1
        • 2.Bxd4#
      • 1...Bc3
        • 2.Sd3#
      • 1...d3
        • 2.Se2#
        • 2.Sxd3#
      • 1...Ba3!
    • 1.d3?
      • 1...Bxc1
        • 2.Rxc1#
      • 1...Ba3
        • 2.Sb3#
      • 1...Bc3
        • 2.Sb3#
      • 1...Kb1!
  • Keys
    • 1.Qb7!
      • 1...Bxc1
        • 2.Qb1#
      • 1...d3
        • 2.Qxb2#
      • 1...Ba3
        • 2.Qb1#
      • 1...Bc3
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(F);P_PINB(b),XP(c)
      • Vars
        • B(b);OGATEB::B(F),XB(b)
      • Refutation
        • B(b);N_SPINB(b),XB(F)
    • Try
      • Q(E);
      • Vars
        • B(b);OGATEB,P_SPINB(b),P_SPINP(c),XS(A)::B(F),XP(c)
        • B(b);N_GUARD::R(B)+S(A)
      • Refutation
        • B(b);P_SPINP(c)
    • Try
      • P(D);
      • Vars
        • B(b);OGATE,P_SPINB(b),P_SPINP(c),XS(A)::R(B),XB(b)
        • B(b);P_SPINP(c)::R(B)+S(A),DCHECK
        • B(b);::R(B)+S(A),DCHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • B(b);OGATE,P_SPINB(b),P_SPINP(c),XS(A)::QAR1(E)
      • P(c);P_SPINB(b)::QAB1(E),XB(b)
      • B(b);OGATE,P_SPINP(c)::QAR1(E)
      • B(b);OGATE::QAR1(E)
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).