MESON Chess Problem Database

Problem Display
PID: 241374 (8/1NB2K2/1Pk5/8/R7/8/8/Q7 w - - 0 1)

Gavrilov, Constantin Grigorievich

Shakhmaty v SSSR, 1985

8/1NB2K2/1Pk5/8/R7/8/8/Q7

#2

6 + 1

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qh1#
  • Tries
    • 1.Rd4?
      • 1...Kb5
        • 2.Qa4#
      • 1...Kxb7!
    • 1.Ra8?
      • 1...Kb5
        • 2.Qa4#
      • 1...Kxb7
        • 2.Qh1#
      • 1...Kd7
        • 2.Qa4#
      • 1...Kd5!
    • 1.Qd4?
      • 1...Kb5
        • 2.Qc4#
        • 2.Qd7#
      • 1...Kxb7!
    • 1.Qe5?
      • 1...Kd7
        • 2.Qe6#
        • 2.Qe8#
      • 1...Kxb7!
    • 1.Qd1?
      • 1...Kb5
        • 2.Qd7#
      • 1...Kxb7!
    • 1.Qe1?
      • 1...Kb5
        • 2.Qe8#
      • 1...Kd5
        • 2.Qh1#
        • 2.Qe4#
        • 2.Qe6#
      • 1...Kd7
        • 2.Qe6#
        • 2.Qe8#
      • 1...Kxb7!
    • 1.Qa2?
      • 1...Kb5
        • 2.Qc4#
      • 1...Kd7
        • 2.Qe6#
      • 1...Kxb7!
  • Keys
    • 1.Qh8!
      • 1...Kb5
        • 2.Qe8#
      • 1...Kd5
        • 2.Qh1#
      • 1...Kxb7
        • 2.Qa8#
      • 1...Kd7
        • 2.Qe8#

Anticipated by 6108(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • R(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);S_FLIGHT,XS(D)::QAB(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
      • K(a);S_FLIGHT::QAB1(A)
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).