MESON Chess Problem Database

Problem Display
PID: 97027 (4R3/3NbN2/8/1P1P1P1P/2QPk3/7K/4n1p1/3BRbB1 w - - 0 1)

Niemeijer, Meindert

US Problem Bulletin, 1982

4R3/3NbN2/8/1P1P1P1P/2QPk3/7K/4n1p1/3BRbB1

#2

13 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qxe2+?
      • 1...Kf4
        • 2.Qf3#
        • 2.Qg4#
        • 2.Qf2#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Kxd5
        • 2.Sb6#
        • 2.Bb3#
        • 2.Qe6#
      • 1...Kxf5
        • 2.Qf3#
        • 2.Qg4#
        • 2.Qf2#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Bxe2!
    • 1.Qc7?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kxf5
        • 2.Bc2#
        • 2.Qe5#
      • 1...Kf3!
  • Keys
    • 1.Qc1!
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qe3#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kxf5
        • 2.Bc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK,XS(b)
      • Refutation
        • B(a);N_SPINB(e),P_SPINB(a),XQ(E)
    • Try
      • Q(E);
      • Vars
        • K(d);N_SPINB(e),N_SPINS(b),S_FLIGHT::QAB1(E)
        • K(d);N_SPINB(e),N_SPINS(b),OGATEB,S_FLIGHT,XP(H)::QAB1(E)
      • Refutation
        • K(d);N_SPINB(e),S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(d);N_SPINB(e),N_SPINS(b),S_FLIGHT::QAB1(E)
      • K(d);N_SPINB(e),S_FLIGHT::QAR1(E)
      • K(d);N_SPINB(e),N_SPINS(b),OGATEB,S_FLIGHT,XP(H)::QAB1(E)
      • K(d);N_SPINB(e),N_SPINS(b),S_FLIGHT,XP(I)::B(A)
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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).