MESON Chess Problem Database

Problem Display
PID: 173139 (8/2Q5/k2pp3/8/ppK5/2b5/8/1B6 w - - 0 1)

Ling, John Francis

Problem Observer, 1976

8/2Q5/k2pp3/8/ppK5/2b5/8/1B6

#2

3 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qc6+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka7!
    • 1.Qb7+?
      • 1...Ka5
        • 2.Qb5#
        • 2.Qa7#
      • 1...Kxb7!
  • Keys
    • 1.Bd3!
      • 1...d5+
        • 2.Kc5#
      • 1...Ba1
        • 2.Kxb4#
      • 1...Be1
        • 2.Kd4#
      • 1...Bb2
        • 2.Kxb4#
      • 1...Bd2
        • 2.Kd4#
      • 1...Bd4
        • 2.Kxb4#
        • 2.Kxd4#
      • 1...Be5
        • 2.Kxb4#
      • 1...Bf6
        • 2.Kxb4#
      • 1...Bg7
        • 2.Kxb4#
      • 1...Bh8
        • 2.Kxb4#
      • 1...a3
        • 2.Kb3#
      • 1...b3
        • 2.Kxc3#
      • 1...e5
        • 2.Kd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);S_FLIGHT,XQ(C)
  • Actual
    • B(A);
    • Vars
      • P(e);CHECK::B(A)+K(B)
      • B(a);::B(A)+K(B),XP(c)
      • B(a);::B(A)+K(B)
      • P(b);::B(A)+K(B)
      • P(c);::B(A)+K(B),XB(a)
      • P(f);::B(A)+K(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).