MESON Chess Problem Database

Problem Display
PID: 214637 (7Q/8/p7/pkp1K3/N7/P4B2/8/8 w - - 0 1)

Shinkman, William Anthony

Chicago Tribune, 1878

7Q/8/p7/pkp1K3/N7/P4B2/8/8

#2

5 + 4

3713 Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qe8#
  • Tries
    • 1.Sc3+?
      • 1...Kb6
        • 2.Qb8#
      • 1...Kc4!
    • 1.Be2+?
      • 1...Kc6
        • 2.Qc8#
      • 1...c4
        • 2.Qe8#
      • 1...Kxa4!
    • 1.Qb8+?
      • 1...Kc4
        • 2.Be2#
      • 1...Kxa4!
    • 1.Qg8?
      • threat
        • 2.Qb3#
      • 1...c4
        • 2.Qe8#
      • 1...Kxa4!
  • Keys
    • 1.Qh3!
      • 1...Kxa4
        • 2.Bc6#
      • 1...Kc4
        • 2.Be2#
      • 1...c4
        • 2.Qd7#

This anticipates 108366(1884)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
        • P(c);P_SPINP(c)::QAB(E)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::B(B)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT,XS(C)::B(B)
      • K(b);S_FLIGHT::B(B)
      • P(c);SBLOCK::QAB(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).