MESON Chess Problem Database

Problem Display
PID: 249335 (N5b1/2pK3p/2P3PQ/q1pkp3/3p2B1/BP3P2/2P1P3/2r5 w - - 0 1)

Dolgov, Vasil Fedorovich

Uralski Problemist, 2000

N5b1/2pK3p/2P3PQ/q1pkp3/3p2B1/BP3P2/2P1P3/2r5

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sxc7#
    • 1...Qd2
      • 2.Sxc7#
    • 1...Qc3
      • 2.Sxc7#
    • 1...Qb4
      • 2.Sxc7#
    • 1...Qxa3
      • 2.Sxc7#
    • 1...Qa4
      • 2.Sxc7#
    • 1...Qb5
      • 2.Sxc7#
    • 1...Qa6
      • 2.Sxc7#
    • 1...Be6+
      • 2.Bxe6#
    • 1...e4
      • 2.Qg5#
      • 2.Qh5#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qe4#
      • 1...Be6+
        • 2.Bxe6#
      • 1...e4
        • 2.Qg5#
        • 2.Qxe4#
      • 1...dxe3!
    • 1.Qf4?
      • threat
        • 2.Qe4#
      • 1...Be6+
        • 2.Bxe6#
      • 1...e4
        • 2.Qg5#
        • 2.Qxe4#
        • 2.Qf5#
        • 2.fxe4#
      • 1...exf4!
    • 1.Qf8?
      • threat
        • 2.Qxg8#
      • 1...Be6+
        • 2.Bxe6#
      • 1...Qxa8
        • 2.Qxc5#
      • 1...e4
        • 2.Qf5#
      • 1...Bf7
        • 2.Qxf7#
      • 1...d3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.e4#
      • 1...Be6+
        • 2.Bxe6#
      • 1...Qxd2
        • 2.Sxc7#
      • 1...d3
        • 2.Qxd3#
      • 1...e4
        • 2.Qg5#
      • 1...Re1
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::S(K),XP(g)
    • Q(c);N_GUARD,XB(C)::S(K),XP(g)
    • Q(c);N_GUARD,P_PINP(G)::S(K),XP(g)
    • B(i);CHECK,N_GUARD::B(F),XB(i)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • B(i);CHECK,N_GUARD::B(F),XB(i)
      • Refutation
        • P(b);XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • B(i);CHECK,N_GUARD::B(F),XB(i)
      • Refutation
        • P(f);XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAB(I),XB(i)
      • Vars
        • B(i);CHECK,N_GUARD::B(F),XB(i)
        • Q(c);N_GUARD,XS(K)::QAR1(I),XP(d)
        • P(f);OGATEB::QAR2(I)
        • B(i);N_GUARD::QAB(I),XB(i)
      • Refutation
        • P(b);
  • Actual
    • Q(I);P_PINP(b)
    • Threat
      • P(B)
    • Vars
      • B(i);CHECK,N_GUARD::B(F),XB(i)
      • Q(c);N_GUARD,N_SPINP(b),XQ(I)::S(K),XP(g)
      • P(b);OGATEB::QAR2(I),XP(b)
      • P(f);OGATEB::QAR(I)
      • R(a);N_GUARD::P(A)
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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).