MESON Chess Problem Database

Problem Display
PID: 119844 (8/Q7/N7/8/2p2p2/1k3P2/7R/2K5 w - - 0 1)

Anonymous

Dubuque Chess Journal, 1830

8/Q7/N7/8/2p2p2/1k3P2/7R/2K5

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rb2+?
      • 1...Ka3
        • 2.Sb4#
        • 2.Sc5#
        • 2.Sc7#
        • 2.Sb8#
      • 1...Ka4
        • 2.Sc5#
        • 2.Sc7#
        • 2.Sb8#
      • 1...Kc3!
    • 1.Qc5?
      • threat
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc3!
    • 1.Qb6+?
      • 1...Ka3
        • 2.Qb4#
      • 1...Ka4
        • 2.Ra2#
        • 2.Qb4#
      • 1...Kc3!
    • 1.Qb8+?
      • 1...Ka3
        • 2.Qb4#
      • 1...Ka4
        • 2.Ra2#
        • 2.Qb4#
      • 1...Kc3!
    • 1.Qb7+?
      • 1...Ka3
        • 2.Qb4#
      • 1...Ka4
        • 2.Ra2#
        • 2.Qb4#
      • 1...Kc3!
    • 1.Qe7?
      • threat
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc3!
  • Keys
    • 1.Ra2!
      • 1...Kxa2
        • 2.Sc5#
      • 1...Kc3
        • 2.Ra3#
      • 1...c3
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR(E)+S(D)
      • K(a);P-FLIGHT::R(B)
      • P(b);OGATEB,SBLOCK::QAB(E)
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).