MESON Chess Problem Database

Problem Display
PID: 146446 (5B2/4n3/4Q1B1/p2N4/3k4/1P1P1n1R/1K6/8 w - - 0 1)

Driver, John Edward

Chess, 1955

5B2/4n3/4Q1B1/p2N4/3k4/1P1P1n1R/1K6/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Qe4#
    • 1...Sf5
      • 2.Qe4#
    • 1...Sc6
      • 2.Qe4#
    • 1...Sxg6
      • 2.Qe4#
    • 1...Sc8
      • 2.Qe4#
    • 1...Sg8
      • 2.Qe4#
  • Tries
    • 1.Sxe7?
      • threat
        • 2.Sc6#
      • 1...Se5
        • 2.Sf5#
        • 2.Qd5#
        • 2.Qb6#
        • 2.Qd6#
      • 1...Kc5!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Qe3#
      • 1...Kxd3
        • 2.Qe3#
      • 1...Kc5
        • 2.Qb6#
      • 1...Sxd5
        • 2.Qe4#
      • 1...Se5
        • 2.Qb6#
      • 1...Sf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(d);XS(E)::QAR1(F)
    • S(d);::QAR1(F)
    • S(d);XB(G)::QAR1(F)
  • Tries
    • Try
      • S(E);XS(d)
      • Threat
        • S(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(G);
    • Threat
      • QAB1(F)
    • Vars
      • K(b);P-FLIGHT,P_SPINS(a),XP(C)::QAR1(F)
      • K(b);P_SPINS(d),S_FLIGHT::QAB1(F)
      • S(d);XS(E)::QAR1(F)
      • S(a);SBLOCK::QAB(F)
      • S(d);::QAR1(F)
HTML5 logo

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).