MESON Chess Problem Database

Problem Display
PID: 167089 (k1b5/bR6/K1P5/8/8/1Q6/8/8 w - - 0 1)

Einevev, N

3rd HM., Listova Gospodarstvo, 1989-1991

k1b5/bR6/K1P5/8/8/1Q6/8/8

#2

4 + 3

145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Rxa7#
    • 1...Bg4
      • 2.Rxa7#
    • 1...Bf5
      • 2.Rxa7#
    • 1...Be6
      • 2.Rxa7#
    • 1...Bxb7+
      • 2.Qxb7#
    • 1...Bd7
      • 2.Rxa7#
  • Tries
    • 1.Qg8?
      • 1...Bg1
        • 2.Qxc8#
      • 1...Bf2
        • 2.Qxc8#
      • 1...Be3
        • 2.Qxc8#
      • 1...Bd4
        • 2.Qxc8#
      • 1...Bc5
        • 2.Qxc8#
      • 1...Bb6
        • 2.Qxc8#
      • 1...Bb8!
  • Keys
    • 1.Qg3!
      • 1...Bxb7+
        • 2.cxb7#
      • 1...Bg1
        • 2.Qb8#
      • 1...Bf2
        • 2.Qb8#
      • 1...Be3
        • 2.Qb8#
      • 1...Bd4
        • 2.Qb8#
      • 1...Bc5
        • 2.Qb8#
      • 1...Bb6
        • 2.Qb8#
      • 1...Bb8
        • 2.Qxb8#
      • 1...Bh3
        • 2.Rxa7#
      • 1...Bg4
        • 2.Rxa7#
      • 1...Bf5
        • 2.Rxa7#
      • 1...Be6
        • 2.Rxa7#
      • 1...Bd7
        • 2.Rxa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(c);N_PINR(D)::R1(D),XB(a)
    • B(c);CHECK,OGATE,XR(D)::QAB1(A),XB(c)
  • Tries
    • Try
      • Q(A);P_PINB(c)
      • Vars
        • B(a);N_GUARD::QAR2(A),XB(c)
      • Refutation
        • B(a);N_SPINB(c)
  • Actual
    • Q(A);
    • Vars
      • B(c);CHECK,OGATE,XR(D)::P(C),XB(c)
      • B(a);N_GUARD::QAR1(A)
      • B(a);N_GUARD::QAR1(A),XB(a)
      • B(c);N_PINR(D)::R1(D),XB(a)
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).