MESON Chess Problem Database

Problem Display
PID: 208100 (3R4/nQ4b1/2p1B3/4B3/4kp2/4p3/1n2P1K1/8 w - - 0 1)

Babson, Joseph Ney

Dubuque Chess Journal, 1874

3R4/nQ4b1/2p1B3/4B3/4kp2/4p3/1n2P1K1/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Qh7#
  • Tries
    • 1.Bxg7?
      • threat
        • 2.Rd4#
      • 1...Sb5
        • 2.Qxc6#
      • 1...f3+!
  • Keys
    • 1.Bb8!
      • 1...f3+
        • 2.exf3#
      • 1...Bf6
        • 2.Qh7#
      • 1...Bc3
        • 2.Qh7#
      • 1...Bd4
        • 2.Qh7#
      • 1...Be5
        • 2.Qh7#
      • 1...Bh6
        • 2.Qh7#
      • 1...Bf8
        • 2.Qh7#
      • 1...Bh8
        • 2.Qh7#
      • 1...Sd1
        • 2.Qb1#
      • 1...Sd3
        • 2.exd3#
      • 1...Sa4
        • 2.Qb1#
      • 1...Sc4
        • 2.Qb1#
      • 1...Sb5
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • B(g);OGATE,SBLOCK,XB(C)::QAB(E)
  • Tries
    • Try
      • B(C);XB(g)
      • Threat
        • R1(F)
      • Vars
        • S(f);N_GUARD::QAB(E),XP(e)
      • Refutation
        • P(d);CHECK
  • Actual
    • B(C);
    • Vars
      • P(d);CHECK,OGATE::P(A),XP(d)
      • B(g);OGATE::QAB(E)
      • S(a);OGATE::QAB(E)
      • S(a);OGATE::P(A),XS(a)
      • S(f);N_GUARD::QAB(E),XP(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).