MESON Chess Problem Database

Problem Display
PID: 189972 (8/8/4p3/8/3k4/K1N2Q2/5P2/4N3 w - - 0 1)

Freimann, Fritz

La Strategie, 1913

8/8/4p3/8/3k4/K1N2Q2/5P2/4N3

#2

5 + 2

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Kb4?
      • threat
        • 2.Qe4#
        • 2.Qe3#
        • 2.Qf4#
      • 1...e5
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb5#
        • 2.Qd1#
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Ke5!
    • 1.Sa4?
      • 1...Kc4
        • 2.Qd3#
      • 1...e5
        • 2.Qd3#
      • 1...Ke5!
    • 1.Sb5+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Ke5
        • 2.Sd3#
      • 1...Kc5!
    • 1.Qe4+?
      • 1...Kxc3
        • 2.Qd3#
        • 2.Qb4#
      • 1...Kc5!
    • 1.Qd5+?
      • 1...Kxc3
        • 2.Qd3#
      • 1...exd5!
    • 1.Qc6?
      • 1...e5
        • 2.Se2#
        • 2.Sb5#
      • 1...Ke5!
    • 1.Qf4+?
      • 1...Kxc3
        • 2.Qb4#
      • 1...Kc5!
  • Keys
    • 1.Qf8!
      • 1...Kxc3
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke5
        • 2.Sf3#
      • 1...e5
        • 2.Qb4#

Anticipated by 135916(1906)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
        • P(b);SBLOCK::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • K(a);S_FLIGHT::S(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAR1(E)
      • Refutation
        • P(b);XQ(E)
    • Try
      • Q(E);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT,XS(D)::QAB1(E)
      • K(a);P-FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::S(A)
      • P(b);SBLOCK::QAR2(E)
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).