MESON Chess Problem Database

Problem Display
PID: 24058 (7b/4KQ2/p2N4/2p5/2PkP1N1/4n3/1P6/1B1n4 w - - 0 1)

Niemeijer, Meindert

Kolnische Rundschau, 1970

(First published on Sat Aug 22 1970)

7b/4KQ2/p2N4/2p5/2PkP1N1/4n3/1P6/1B1n4

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6+
      • 2.Qxf6#
    • 1...Bg7
      • 2.Qxg7#
    • 1...Sf1
      • 2.Sf5#
      • 2.Qd5#
    • 1...Sc2
      • 2.Qd5#
    • 1...Sg2
      • 2.Sf5#
      • 2.Qd5#
    • 1...Sxc4
      • 2.Sf5#
      • 2.Qxc4#
      • 2.Qd5#
    • 1...Sd5+
      • 2.Qxd5#
    • 1...Sf5+
      • 2.Sxf5#
    • 1...a5
      • 2.Sb5#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qd2#
      • 1...Bf6+
        • 2.Qxf6#
      • 1...Sxb2
        • 2.Qxe3#
        • 2.Qxb2#
      • 1...Sxf2!
  • Keys
    • 1.Qf4!
      • threat
        • 2.e5#
      • 1...Bf6+
        • 2.Qxf6#
      • 1...Sd5+
        • 2.exd5#
      • 1...Sf5+
        • 2.exf5#
      • 1...Sxb2
        • 2.Qxe3#
      • 1...Sxc4
        • 2.Sf5#
      • 1...Sc2
        • 2.Qd2#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sf2
        • 2.Qxe3#
      • 1...Sc3
        • 2.Qxe3#
      • 1...Sg2
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(f);CHECK,N_GUARD::QAB(H),XB(f)
    • B(f);N_GUARD::QAB(H),XB(f)
    • S(b);N_GUARD::QAR1(H)
    • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
    • S(b);CHECK,N_GUARD::S(F),XS(b)
    • P(e);N_GUARD::S(F)
  • Tries
    • Try
      • Q(H);P_PINS(b)
      • Threat
        • QAR2(H)
      • Vars
        • B(f);CHECK,N_GUARD::QAB(H),XB(f)
      • Refutation
        • S(a);N_SPINS(b),XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)+P(D)
    • Vars
      • B(f);CHECK,N_GUARD::QAB(H),XB(f)
      • S(b);CHECK,OGATE::QAR(H)+P(D),XS(b)
      • S(a);N_GUARD,XP(B)::QAB1(H),XS(b)
      • S(b);N_GUARD,SBLOCK,XP(C)::S(F)
      • S(b);OGATE::QAR2(H)
      • B(f);N_GUARD::QAB1(H),XB(f)
      • S(a);N_GUARD::QAB1(H),XS(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).