MESON Chess Problem Database

Problem Display
PID: 92670 (k1K5/6Q1/8/8/1p6/5q1B/3n4/8 w - - 0 1)

van den Berg, Evert Jan

Tijdschrift vd KNSB, 1935

k1K5/6Q1/8/8/1p6/5q1B/3n4/8

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qb7#
    • 1...Qe2
      • 2.Qb7#
    • 1...Qg2
      • 2.Qa1#
    • 1...Qe4
      • 2.Qa1#
    • 1...Qh5
      • 2.Qb7#
    • 1...Qb7+
      • 2.Qxb7#
    • 1...Qf1
      • 2.Qb7#
    • 1...Qf2
      • 2.Qb7#
    • 1...Qa3
      • 2.Qb7#
    • 1...Qb3
      • 2.Qb7#
    • 1...Qd3
      • 2.Qb7#
    • 1...Qe3
      • 2.Qb7#
    • 1...Qg3
      • 2.Qb7#
    • 1...Qf4
      • 2.Qa1#
      • 2.Qb7#
    • 1...Qf6
      • 2.Qb7#
    • 1...Se4
      • 2.Qb7#
    • 1...b3
      • 2.Qa1#
  • Keys
    • 1.Bg2!
      • threat
        • 2.Qa1#
      • 1...Qc6+
        • 2.Bxc6#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Sb1
        • 2.Bxf3#
      • 1...Sb3
        • 2.Bxf3#
      • 1...Sc4
        • 2.Bxf3#
      • 1...Se4
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 14
  • Sets
    • Q(b);N_GUARD::QAB1(B)
    • Q(b);N_GUARD::QAB(B)
    • Q(b);CHECK,N_GUARD::QAB1(B),XQ(b)
    • S(a);S_CUTQ(b)::QAB1(B)
    • P(c);S_CUTQ(b)::QAB(B)
  • Actual
    • B(A);P_PINQ(b)
    • Threat
      • QAB(B)
    • Vars
      • Q(b);CHECK,OGATE::B(A),XQ(b)
      • Q(b);CHECK,N_GUARD::QAB1(B),XQ(b)
      • S(a);N_GUARD::B(A),XQ(b)
      • S(a);N_SPINQ(b),S_CUTQ(b)::QAB1(B)
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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).