MESON Chess Problem Database

Problem Display
PID: 29940 (6K1/p3p1P1/r4P1Q/1RBB1k2/Rq5p/1P1N3p/2P4P/8 w - - 0 1)

Kopaev, Viacheslav Georgievich

2nd Prize, Bakcsi-60 JT, 1993-1994

6K1/p3p1P1/r4P1Q/1RBB1k2/Rq5p/1P1N3p/2P4P/8

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Qg6#
    • 1...Qe1
      • 2.Rf4#
    • 1...Qa3
      • 2.Rf4#
    • 1...Qc3
      • 2.Rf4#
    • 1...Qa5
      • 2.Rf4#
    • 1...Qxc5
      • 2.Rf4#
    • 1...Qxb3
      • 2.Rf4#
    • 1...Qf4
      • 2.Rxf4#
    • 1...Qxb5
      • 2.Rf4#
    • 1...Rxf6
      • 2.Qh5#
    • 1...exf6
      • 2.Qh5#
  • Tries
    • 1.Kh7?
      • threat
        • 2.Qg6#
      • 1...Kg4
        • 2.Qg6#
      • 1...Rxf6
        • 2.Qh5#
      • 1...Qg4!
    • 1.Be3?
      • threat
        • 2.Qg5#
      • 1...Kg4
        • 2.Qg5#
        • 2.Qg6#
      • 1...exf6
        • 2.Qh5#
      • 1...Qf4
        • 2.Rxf4#
      • 1...Qg4!
    • 1.Bf7?
      • threat
        • 2.Qg6#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kg4
        • 2.Qh5#
      • 1...Qg4
        • 2.Bxe7#
      • 1...Rxf6!
    • 1.Qf4+?
      • 1...Kg6
        • 2.Bf7#
      • 1...Qxf4!
  • Keys
    • 1.Bxe7!
      • threat
        • 2.Qh5#
      • 1...Kg4
        • 2.Qg6#
      • 1...Qxe7
        • 2.Rf4#
      • 1...Qg4
        • 2.Bf7#
      • 1...Qd2
        • 2.Bf7#
      • 1...Qf4
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • K(d);P_SPINQ(b),S_FLIGHT::QAR2(J)
    • Q(b);OGATE::R1(E)
    • Q(b);OGATE,XB(G)::R1(E)
    • Q(b);OGATE,P_PINB(H),XP(C)::R1(E)
    • Q(b);OGATE::R1(E),XQ(b)
    • Q(b);OGATE,XR(F)::R1(E)
    • R(e);SBLOCK,XP(I)::QAR2(J)
    • P(g);SBLOCK,XP(I)::QAR2(J)
  • Tries
    • Try
      • K(L);S_FLIGHT
      • Threat
        • QAB1(J)
      • Vars
        • K(d);P_SPINQ(b),S_FLIGHT::QAR2(J)
        • R(e);SBLOCK,XP(I)::QAR2(J)
      • Refutation
        • Q(b);
    • Try
      • B(G);
      • Threat
        • QAR1(J)
      • Vars
        • P(g);SBLOCK,XP(I)::QAR2(J)
        • Q(b);OGATE::R1(E),XQ(b)
      • Refutation
        • Q(b);P_PINP(K)
    • Try
      • B(H);
      • Threat
        • QAB1(J)
      • Vars
        • K(d);P_SPINQ(b),S_FLIGHT::QAR1(J)
        • K(d);P_SPINQ(b),S_FLIGHT::QAB1(J)
        • Q(b);N_GUARD,P_PINP(K)::R(F)+B(G),XP(g)
      • Refutation
        • R(e);XP(I)
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);S_FLIGHT::B(H)
      • Refutation
        • Q(b);XQ(J)
  • Actual
    • B(G);XP(g)
    • Threat
      • QAR2(J)
    • Vars
      • K(d);P_SPINQ(b),S_FLIGHT::QAR2(J)
      • Q(b);OGATE,XB(G)::R1(E)
      • Q(b);N_GUARD,P_PINP(K)::R(F)+B(H)
      • Q(b);N_GUARD::R(F)+B(H)
      • Q(b);OGATE::R1(E),XQ(b)
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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).