MESON Chess Problem Database

Problem Display
PID: 206806 (3K4/3B4/3kp3/3p3Q/7R/8/8/8 w - - 0 1)

Parshin, Lev D

Sachova skladba, 1991

3K4/3B4/3kp3/3p3Q/7R/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Rxd4#
  • Tries
    • 1.Qe5+?
      • 1...Kc5
        • 2.Qc7#
      • 1...Kxe5!
    • 1.Qg5?
      • 1...e5
        • 2.Qe7#
      • 1...d4
        • 2.Rxd4#
      • 1...Kc5!
    • 1.Qh8?
      • 1...d4
        • 2.Qxd4#
      • 1...e5
        • 2.Qf8#
      • 1...Kc5!
  • Keys
    • 1.Qg4!
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke5
        • 2.Qxe6#
        • 2.Qf4#
      • 1...d4
        • 2.Qxd4#
      • 1...e5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::R(A),XP(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(a),S_FLIGHT::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(c);::QAB1(B)
        • P(a);OGATEB::R(A),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(c);SBLOCK::QAB(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);SBLOCK::QAB(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).