MESON Chess Problem Database

Problem Display
PID: 245510 (k7/rq6/8/8/4B3/4Q3/8/1R3K2 w - - 0 1)

Shumarin, Vladimir Pavlovich

Sp. HM., Antipin JT, 2003

k7/rq6/8/8/4B3/4Q3/8/1R3K2

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bxb7+?
      • 1...Kb8
        • 2.Qf4#
        • 2.Qg3#
        • 2.Qe5#
      • 1...Rxb7!
    • 1.Qb3?
      • threat
        • 2.Qg8#
      • 1...Qxe4
        • 2.Qb8#
      • 1...Ra1
        • 2.Qxb7#
      • 1...Ra2
        • 2.Qxb7#
      • 1...Ra3
        • 2.Qxb7#
      • 1...Ra4
        • 2.Qxb7#
      • 1...Ra5
        • 2.Qxb7#
      • 1...Ra6
        • 2.Qxb7#
      • 1...Qd5
        • 2.Qb8#
      • 1...Kb8!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qd8#
      • 1...Kb8
        • 2.Qd8#
      • 1...Ra1
        • 2.Qxb7#
      • 1...Ra2
        • 2.Qxb7#
      • 1...Ra3
        • 2.Qxb7#
      • 1...Ra4
        • 2.Qxb7#
      • 1...Ra5
        • 2.Qxb7#
      • 1...Ra6
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);CHECK,XQ(b)
      • Refutation
        • R(a);XB(D)
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XB(D)::QAR1(C)
        • R(a);N_GUARD,P_PINR(A)::QAB1(C),XQ(b)
        • R(a);N_GUARD::QAB1(C),XQ(b)
        • Q(b);OGATE::QAR1(C)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • K(c);P-FLIGHT::QAR2(C)
      • R(a);N_GUARD,P_PINR(A)::QAB1(C),XQ(b)
      • R(a);N_GUARD::QAB1(C),XQ(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).