MESON Chess Problem Database

Problem Display
PID: 175633 (8/6p1/2Q1p3/p3kb1B/1p6/3PN3/3B1K2/3R4 w - - 0 1)

Anonymous

Philadelphia Times, 1900

8/6p1/2Q1p3/p3kb1B/1p6/3PN3/3B1K2/3R4

#2

7 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd6#
    • 1...Kf4
      • 2.Sc4#
      • 2.Sg4#
  • Tries
    • 1.Sc4+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Kf6!
    • 1.Sg4+?
      • 1...Kd4
        • 2.Be3#
        • 2.Qc4#
        • 2.Qd6#
      • 1...Bxg4!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Sf1#
        • 2.Sc2#
        • 2.Sg2#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sxf5#
      • 1...Kf6!
    • 1.Qd6+?
      • 1...Kf6
        • 2.Sd5#
      • 1...Kxd6!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Kf6!
  • Keys
    • 1.d4+!
      • 1...Kxd4
        • 2.Bc3#
      • 1...Kf4
        • 2.Sf1#
        • 2.Sc2#
        • 2.Sg2#
        • 2.Sc4#
        • 2.Sg4#
      • 1...Kf6
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAR2(G)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(G)
      • Refutation
        • K(c);P_SPINP(e),S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • B(d);XS(E)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);P_SPINP(e),S_FLIGHT::S(E)
      • Refutation
        • K(c);S_FLIGHT,XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(G)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • P(D);CHECK
    • Vars
      • K(c);S_FLIGHT,XP(D)::R(A)+B(B),DCHECK
      • K(c);P_SPINP(e),S_FLIGHT::S(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).