MESON Chess Problem Database

Problem Display
PID: 263071 (8/1R6/6N1/3k4/N6p/7Q/8/5K2 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

SuperProblem, 2020

8/1R6/6N1/3k4/N6p/7Q/8/5K2

#2

5 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qd7#
    • 1...Kd6
      • 2.Qd7#
  • Tries
    • 1.Qg4?
      • 1...Kc6
        • 2.Qd7#
      • 1...Kd6
        • 2.Qd7#
      • 1...h3!
    • 1.Qf5+?
      • 1...Kc4
        • 2.Qe4#
      • 1...Kc6
        • 2.Qd7#
      • 1...Kd6
        • 2.Qd7#
      • 1...Kd4!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Rd7#
      • 1...Kxe6!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Se5#
      • 1...Ke4!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Ke6!
  • Keys
    • 1.Ke2!
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qd7#
      • 1...Kd6
        • 2.Qd7#

FEATURES

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