MESON Chess Problem Database

Problem Display
PID: 263195 (7R/8/4Q1P1/6kp/8/8/4N1K1/8 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

SuperProblem, 2022

7R/8/4Q1P1/6kp/8/8/4N1K1/8

#2

5 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kf3?
      • 1...Kh4
        • 2.Qg4#
      • 1...h4!
    • 1.Sg3?
      • 1...Kh4
        • 2.Rxh5#
      • 1...h4
        • 2.Qf5#
      • 1...Kf4!
    • 1.Sd4?
      • 1...Kh4
        • 2.Sf3#
      • 1...h4
        • 2.Qf5#
      • 1...Kf4!
    • 1.Sf4?
      • 1...Kh4
        • 2.Rxh5#
      • 1...h4
        • 2.Sh3#
      • 1...Kxf4!
    • 1.Qf5+?
      • 1...Kh4
        • 2.Rxh5#
        • 2.Qf4#
        • 2.Qxh5#
      • 1...Kxf5!
    • 1.Qf7?
      • 1...Kg4
        • 2.Qf4#
      • 1...Kh4
        • 2.Qf4#
      • 1...h4!
    • 1.Qe5+?
      • 1...Kg4
        • 2.Qf4#
        • 2.Qxh5#
      • 1...Kh4
        • 2.Qg3#
        • 2.Qf4#
        • 2.Qxh5#
      • 1...Kxg6!
    • 1.Qf6+?
      • 1...Kg4
        • 2.Qf4#
      • 1...Kxf6!
    • 1.g7?
      • 1...h4
        • 2.g8Q#
        • 2.g8R#
      • 1...Kh4!
  • Keys
    • 1.Sg1!
      • 1...Kf4
        • 2.Sh3#
      • 1...Kh4
        • 2.Sf3#
      • 1...h4
        • 2.Sh3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • S(A);
      • Vars
        • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::R1(E),XP(b)
        • P(b);::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::S(A)
        • P(b);::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::R1(E),XP(b)
        • P(b);::S(A)
      • Refutation
        • K(a);S_FLIGHT,XS(A)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(C)
        • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • P(D);
      • Vars
        • P(b);::P=Q
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::S(A)
      • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::S(A)
      • P(b);::S(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).