MESON Chess Problem Database

Problem Display
PID: 256524 (b7/8/4Q3/4p1K1/4k3/1N4p1/1nP2pp1/3N4 w - - 0 1)

Maximov, Nikolai J

Wiener Schachzeitung, 1899

b7/8/4Q3/4p1K1/4k3/1N4p1/1nP2pp1/3N4

#2

5 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qg4#
    • 1...Bd5
      • 2.Qg4#
      • 2.Qf5#
    • 1...Bc6
      • 2.Qxc6#
  • Tries
    • 1.Sc5+?
      • 1...Kf3
        • 2.Qg4#
      • 1...Kd4!
    • 1.Qc4+?
      • 1...Kf3
        • 2.Sd2#
        • 2.Qg4#
      • 1...Sxc4!
    • 1.Qd7?
      • threat
        • 2.Sd2#
      • 1...Kf3
        • 2.Qg4#
      • 1...Sxd1
        • 2.Qd3#
      • 1...Bd5
        • 2.Qg4#
        • 2.Qf5#
      • 1...Sc4
        • 2.Qd3#
      • 1...f1S!
    • 1.Qxe5+?
      • 1...Kf3
        • 2.Sd2#
        • 2.Sd4#
        • 2.Qe3#
      • 1...Kxe5!
    • 1.Qg6+?
      • 1...Kd5
        • 2.Se3#
      • 1...Kf3!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qxa8#
      • 1...Kf3
        • 2.Sd2#
      • 1...Kd5
        • 2.Sc3#
      • 1...Sxd1
        • 2.Qd3#
      • 1...Bd5
        • 2.Qe2#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Bb7
        • 2.Qxb7#

This is a version

Version by Udo Degener, Albrecht Collection.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(e);N_GUARD,N_SPINP(f),S_FLIGHT::QAB1(E)
    • B(g);N_GUARD::QAB(E),XB(g)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);N_GUARD,N_SPINP(f),S_FLIGHT::QAB1(E)
      • Refutation
        • K(e);N_SPINP(f),P-FLIGHT
    • Try
      • Q(E);CHECK,N_PINP(f)
      • Refutation
        • S(a);XQ(E)
    • Try
      • Q(E);N_PINP(f)
      • Threat
        • S(C)
      • Vars
        • K(e);N_GUARD,S_FLIGHT::QAB1(E)
        • S(a);N_GUARD,XS(A)::QAB1(E)
        • S(a);N_GUARD::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK,XP(f)
      • Refutation
        • K(e);P-FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK,N_PINP(f)
      • Vars
        • K(e);N_GUARD,S_FLIGHT::S(A)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(E);N_PINP(f)
    • Threat
      • QAB(E),XB(g)
    • Vars
      • K(e);N_GUARD,S_FLIGHT::S(C)
      • K(e);N_GUARD,S_FLIGHT::S(A)
      • S(a);N_GUARD,XS(A)::QAB1(E)
      • B(g);SBLOCK::QAR2(E)
      • B(g);N_GUARD::QAB(E),XB(g)
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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).