MESON Chess Problem Database

Problem Display
PID: 243152 (1BK5/1pRP4/1Q3n1b/r1N1k3/8/2P1p1NP/b6P/3qRr2 w - - 0 1)

Banny, Dimitry Nikolaevich

Szachy, 1971

1BK5/1pRP4/1Q3n1b/r1N1k3/8/2P1p1NP/b6P/3qRr2

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxf6#
    • 1...Kd5
      • 2.Qe6#
    • 1...Qxd7+
      • 2.Rxd7#
    • 1...Rxc5
      • 2.Rxc5#
    • 1...Bd5
      • 2.Rc6#
      • 2.Rxb7#
  • Tries
    • 1.Sd3+?
      • 1...Qxd3
        • 2.Rc5#
      • 1...Kd5!
    • 1.Sce4?
      • threat
        • 2.Rc5#
      • 1...Qxd7+
        • 2.Rxd7#
      • 1...Kd5
        • 2.Qd6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Rc5
        • 2.Rxc5#
      • 1...Kf4!
    • 1.Rxb7+?
      • 1...Qd6
        • 2.Qxd6#
      • 1...Kd5!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qf5#
        • 2.Qxe3#
        • 2.Qxf6#
      • 1...Bxe6!
  • Keys
    • 1.Sxb7!
      • threat
        • 2.Rc5#
      • 1...Qxd7+
        • 2.Rxd7#
      • 1...Kf4
        • 2.Qxe3#
      • 1...Kd5
        • 2.Qd6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Rc5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);N_SPINP(d),S_FLIGHT::QAR2(G),XS(g)
    • K(f);N_SPINP(d),P-FLIGHT::QAB1(G)
    • Q(a);CHECK,OGATE,XP(I)::B(J)+R(H),XQ(a)
    • R(e);OGATE,P_PINR(H),XS(F)::B(J)+R(H),DCHECK,XR(e)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • Q(a);XS(F)::B(J)+R(H),DCHECK
      • Refutation
        • K(f);N_SPINP(d),P-FLIGHT
    • Try
      • S(F);N_PINP(d)
      • Threat
        • B(J)+R(H),DCHECK
      • Vars
        • Q(a);CHECK,OGATE,XP(I)::B(J)+R(H),XQ(a)
        • K(f);P-FLIGHT::QAR1(G)
        • Q(a);N_GUARD::QAB1(G),XQ(a)
        • R(e);P_PINR(H)::B(J)+R(H),DCHECK,XR(e)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(H);CHECK,XP(i)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(G),XQ(a)
      • Refutation
        • K(f);N_SPINP(d),P-FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • B(c);P_PINP(I),XQ(G)
  • Actual
    • S(F);XP(i)
    • Threat
      • B(J)+R(H),DCHECK
    • Vars
      • Q(a);CHECK,OGATE,XP(I)::B(J)+R(H),XQ(a)
      • K(f);N_SPINP(d),S_FLIGHT::QAB1(G),XP(d)
      • K(f);N_SPINP(d),P-FLIGHT::QAR1(G)
      • Q(a);N_GUARD::QAB1(G),XQ(a)
      • R(e);P_PINR(H)::B(J)+R(H),DCHECK,XR(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).