MESON Chess Problem Database

Problem Display
PID: 270553 (4N3/8/8/5NB1/4k3/8/Q7/3K4 w - - 0 1)

Koshel, Mikhail Igorevich

64 Shakhmatnoe obozrenie, 2023

4N3/8/8/5NB1/4k3/8/Q7/3K4

#2

5 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qc2#
    • 1...Kf3
      • 2.Qe2#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qc4#
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kd4!
    • 1.Sed6+?
      • 1...Kd3
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qc2#
        • 2.Qd2#
        • 2.Qa3#
      • 1...Kf3
        • 2.Qe2#
      • 1...Ke5!
    • 1.Sf6+?
      • 1...Kd3
        • 2.Qb3#
        • 2.Qc2#
      • 1...Kf3
        • 2.Qe2#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kxf5!
    • 1.Sc7?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qe2#
      • 1...Ke5
        • 2.Qd5#
        • 2.Qe6#
      • 1...Kxf5!
    • 1.Qe6+?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kd3!
  • Keys
    • 1.Seg7!
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qe2#
      • 1...Ke5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::QAB1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(E);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(B)
      • K(a);N_GUARD,P-FLIGHT::QAR1(B)
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).