MESON Chess Problem Database

Problem Display
PID: 117200 (kb6/1q6/1P6/8/K7/1p6/1Q6/7B w - - 0 1)

Kuligin, Nikolai Volodimirovich

Pat a Mat, 1990

kb6/1q6/1P6/8/K7/1p6/1Q6/7B

#2

4 + 4

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Bxg2#
      • 2.Qxg2#
    • 1...Qf3
      • 2.Bxf3#
    • 1...Qe4+
      • 2.Bxe4#
    • 1...Qd5
      • 2.Bxd5#
    • 1...Qc6+
      • 2.Bxc6#
  • Tries
    • 1.Qh8?
      • 1...Qe4+
        • 2.Bxe4#
      • 1...Qc6+
        • 2.Bxc6#
      • 1...Qxh1
        • 2.Qxh1#
      • 1...Qg2
        • 2.Bxg2#
      • 1...Qf3
        • 2.Bxf3#
      • 1...Qd5
        • 2.Bxd5#
      • 1...b2!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qxb7#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qc6+
        • 2.Qxc6#
      • 1...Qxg2
        • 2.Bxg2#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qd5
        • 2.Qxd5#

Anticipated by 78397(1959)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATEB::B(A),XQ(b)
    • Q(b);CHECK,OGATEB::B(A),XQ(b)
  • Tries
    • Try
      • Q(B);P_PINB(d)
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(B),XQ(b)
        • Q(b);OGATEB::B(A),XQ(b)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XQ(b)
    • Vars
      • Q(b);CHECK,OGATEB::QAB(B),XQ(b)
      • Q(b);OGATE,XQ(B)::B(A),XQ(b)
      • Q(b);OGATEB::QAB(B),XQ(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).