MESON Chess Problem Database

Problem Display
PID: 112945 (bb5R/2P2K2/R3BN2/8/7n/2B3kP/1q1n1rpp/4Q1N1 w - - 0 1)

Dombrovskis, Alfreds A

Kopnin, Aleksey Grigorevich

Behting MT, 1967

bb5R/2P2K2/R3BN2/8/7n/2B3kP/1q1n1rpp/4Q1N1

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qe5#
    • 1...Qa1
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Qc1
      • 2.Be5#
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Qa3
      • 2.Be5#
    • 1...Qb1
      • 2.Be5#
    • 1...Qa2
      • 2.Be5#
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Qc2
      • 2.Be5#
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Qb3
      • 2.Be5#
    • 1...Qb6
      • 2.Be5#
    • 1...Qb7
      • 2.Be5#
    • 1...Bf3
      • 2.Qe5#
    • 1...Bb7
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Sb3
      • 2.cxb8Q#
      • 2.cxb8B#
    • 1...Sdf3
      • 2.Sh5#
    • 1...Shf3
      • 2.Se2#
  • Tries
    • 1.Rg8+?
      • 1...Kf4
        • 2.Sh5#
        • 2.Rg4#
        • 2.Qe5#
      • 1...Sg6!
    • 1.Qe3+?
      • 1...Rf3
        • 2.Se2#
      • 1...Bf3
        • 2.Sh5#
        • 2.Qe5#
      • 1...Sdf3
        • 2.Sh5#
      • 1...Shf3!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Be5#
      • 1...Kf4
        • 2.Qe5#
      • 1...Qxc3
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Bf3
        • 2.Qe5#
      • 1...Sb3
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Sdf3
        • 2.Sh5#
      • 1...Shf3
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(f);N_PINS(G),N_SPINR(c),S_FLIGHT::QAB1(A)
    • Q(a);N_GUARD::PXB(i)=Q
    • Q(a);N_GUARD::B(C)
    • Q(a);N_GUARD,P_PINB(F)::B(C)
    • Q(a);N_GUARD,P_PINP(H)::B(C)
    • B(h);N_PINS(G)::QAB(A)
    • B(h);S_CUTQ(a)::PXB(i)=Q
    • S(b);S_CUTQ(a)::PXB(i)=Q
    • S(b);N_PINS(G)::S(G)
    • S(g);N_PINS(G),SBLOCK::S(B)
  • Tries
    • Try
      • R(J);CHECK
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(A);CHECK,N_PINR(c)
      • Vars
        • R(c);P_SPINR(c)::S(B)
        • S(b);N_PINS(G),P_SPINS(b)::S(G)
      • Refutation
        • S(g);N_PINS(G),P_SPINS(g)
  • Actual
    • R(E);
    • Threat
      • R(E)+B(C),DCHECK
    • Vars
      • K(f);N_PINS(G),N_SPINR(c),S_FLIGHT::QAB1(A)
      • Q(a);N_GUARD,P_SPINQ(a),XB(C)::PXB(i)=Q
      • B(h);N_PINS(G)::QAB(A)
      • S(b);S_CUTQ(a)::PXB(i)=Q
      • S(b);N_PINS(G)::S(G)
      • S(g);N_PINS(G),SBLOCK::S(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).