Problem Display
PID: 2101 (6B1/B1Q1p3/3pN2p/3k4/P4p2/1K1p4/2n3n1/b7 w - - 0 1)

Brown, Theodore Morris

Source?, 0000

6B1/B1Q1p3/3pN2p/3k4/P4p2/1K1p4/2n3n1/b7

#2

6 + 9


1679 American Chess Nuts 1868
158 Brentano's Chess Monthly 1881

SOLUTION


  • SOUND
  • Sets
    • 1...Be5
      • 2.Qc4#
      • 2.Qb7#
  • Tries
    • 1.Sd4+?
      • 1...Ke4
        • 2.Qxe7#
      • 1...Ke5
        • 2.Qxe7#
      • 1...e6!
    • 1.Qa5+?
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke4!
  • Keys
    • 1.Qxe7!
      • threat
        • 2.Sd4#
        • 2.Sd8#
      • 1...Sd4+
        • 2.Sxd4#
      • 1...Ke4
        • 2.Sd4#
      • 1...Ke5
        • 2.Sd4#
        • 2.Sg7#
      • 1...Kc6
        • 2.Sd8#
      • 1...Bd4
        • 2.Sxd4#
        • 2.Sd8#
      • 1...Be5
        • 2.Qb7#

This is a version of 207195

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(f);S_FLIGHT::QAR(E),XP(i)
        • K(f);P-FLIGHT,P_SPINP(g)::QAR2(E),XP(i)
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(E)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • Q(E);XP(i)
    • Threat
      • DUALS(2)
    • Vars
      • S(b);CHECK::B(F)+S(C),XS(b)
      • K(f);S_FLIGHT::QAR(E)+S(C)
      • K(f);S_FLIGHT::S(C)
      • B(a);SBLOCK::QAB(E)


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).