MESON Chess Problem Database

Problem Display
PID: 49206 (2B4K/6R1/5k2/3b3p/3p3q/3N2Np/8/3Q4 w - - 0 1)

Latzel, Gerhard Paul

Schach-Express, 1949

2B4K/6R1/5k2/3b3p/3p3q/3N2Np/8/3Q4

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sxh5#
    • 1...Qf4
      • 2.Sxh5#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qe5#
        • 2.Qe7#
      • 1...Qxg3
        • 2.Qe7#
      • 1...Qg5
        • 2.Qe7#
      • 1...Qe4
        • 2.Sxh5#
      • 1...Qf4
        • 2.Sxh5#
        • 2.Qe7#
      • 1...Be6
        • 2.Qe5#
        • 2.Qxe6#
      • 1...Bf7
        • 2.Qe5#
      • 1...Be4!
    • 1.Qf3+?
      • 1...Qf4
        • 2.Sxh5#
        • 2.Qxf4#
      • 1...Bxf3!
    • 1.Qe1?
      • threat
        • 2.Qe5#
        • 2.Qe7#
      • 1...Qxg3
        • 2.Qe7#
      • 1...Qg5
        • 2.Qe7#
      • 1...Qe4
        • 2.Sxh5#
      • 1...Qf4
        • 2.Sxh5#
        • 2.Qe7#
      • 1...Be6
        • 2.Qe5#
        • 2.Qxe6#
      • 1...Bf7
        • 2.Qe5#
      • 1...Be4!
    • 1.Qf1+?
      • 1...Qf4
        • 2.Sxh5#
        • 2.Qxf4#
      • 1...Bf3!
  • Keys
    • 1.Qxh5!
      • threat
        • 2.Qxh4#
      • 1...Qxh5+
        • 2.Sxh5#
      • 1...Qxg3
        • 2.Qf5#
      • 1...Qg5
        • 2.Qxg5#
      • 1...Qe4
        • 2.Qg5#
      • 1...Qf4
        • 2.Qg6#
      • 1...Qg4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::S(C),XP(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XS(C)::QAB1(A)
        • Q(c);::QAB1(A)
        • Q(c);N_GUARD::S(C),XP(e)
        • B(d);::QAB1(A)
      • Refutation
        • B(d);
    • Try
      • Q(A);CHECK
      • Refutation
        • B(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XS(C)::QAB1(A)
        • Q(c);::QAB1(A)
        • Q(c);N_GUARD::S(C),XP(e)
        • B(d);::QAB1(A)
      • Refutation
        • B(d);
    • Try
      • Q(A);CHECK
      • Refutation
        • B(d);P_SPINB(d)
  • Actual
    • Q(A);P_SPINQ(A),XP(e)
    • Threat
      • QAB(A),XQ(c)
    • Vars
      • Q(c);CHECK,XQ(A)::S(C),XQ(c)
      • Q(c);N_PINQ(A),XS(C)::QAR1(A)
      • Q(c);N_PINQ(A)::QAB1(A),XQ(c)
      • Q(c);N_PINQ(A)::QAB1(A)
      • Q(c);N_PINQ(A)::QAR1(A)
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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).