MESON Chess Problem Database

Problem Display
PID: 207499 (4Q3/8/8/8/8/P2kbB2/1P6/K7 w - - 0 1)

Martindale, Frank W

Western Advertiser, 1872

4Q3/8/8/8/8/P2kbB2/1P6/K7

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qe4#
    • 1...Bd4
      • 2.Qe2#
  • Tries
    • 1.Qd7+?
      • 1...Kc2
        • 2.Qd1#
      • 1...Kc4
        • 2.Qd5#
      • 1...Bd4!
    • 1.Qd8+?
      • 1...Kc2
        • 2.Qd1#
      • 1...Kc4
        • 2.Qd5#
      • 1...Bd4!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qc3#
      • 1...Kc2
        • 2.Qc3#
      • 1...Kd2
        • 2.Qc3#
      • 1...Kc4
        • 2.Qd5#
      • 1...Bd4
        • 2.Qe2#
      • 1...Bd2
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::QAB1(E)
    • B(b);OGATE,P_PINP(B),SBLOCK::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • B(b);P_PINP(B),P_SPINB(b)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • B(b);P_PINP(B),P_SPINB(b)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);P-FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAB1(E)
      • B(b);OGATE,P_PINP(B),SBLOCK::QAB1(E)
      • B(b);SBLOCK::QAB1(E)
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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).