MESON Chess Problem Database

Problem Display
PID: 166864 (8/2N2K2/8/2P1k1b1/8/3P4/5Q2/8 w - - 0 1)

Speckmann, Werner

Il Due Mosse, 1955

8/2N2K2/8/2P1k1b1/8/3P4/5Q2/8

#2

5 + 2

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qf6#
    • 1...Bd2
      • 2.Qf6#
    • 1...Be3
      • 2.Qf6#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bh6
      • 2.Qf6#
  • Tries
    • 1.Qe3+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Bxe3!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kxd4!
    • 1.Qh4?
      • threat
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Bf4
        • 2.Qf6#
      • 1...Bxh4!
  • Keys
    • 1.Kg6!
      • 1...Be3
        • 2.Qxe3#
        • 2.Qf6#
      • 1...Bc1
        • 2.Qf6#
      • 1...Bd2
        • 2.Qf6#
      • 1...Bf4
        • 2.Qb2#
      • 1...Bh4
        • 2.Qe3#
      • 1...Bf6
        • 2.Qe3#
        • 2.Qxf6#
      • 1...Bh6
        • 2.Qf6#
      • 1...Be7
        • 2.Qe3#
      • 1...Bd8
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAB1(A)
    • B(b);N_GUARD::QAB1(A),XB(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • B(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • B(b);OGATE::QAB1(A)
      • Refutation
        • B(b);XQ(A)
  • Actual
    • K(E);S_FLIGHT
    • Vars
      • B(b);N_GUARD::QAB1(A)
      • B(b);SBLOCK::QAB(A)
      • B(b);N_GUARD::QAR2(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).