MESON Chess Problem Database

Problem Display
PID: 86479 (8/8/1N1p4/B1pp2p1/1rN3Pb/2kpQKp1/3p2P1/3B4 w - - 0 1)

Kopyl, Valery Volodimirovich

Melnichenko, Viktor Oleksandrovich

Die Schwalbe, 2005

8/8/1N1p4/B1pp2p1/1rN3Pb/2kpQKp1/3p2P1/3B4

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.Sa4#
    • 1...d4
      • 2.Qxd2#
  • Tries
    • 1.Qg1?
      • 1...dxc4
        • 2.Sa4#
      • 1...d4!
    • 1.Qf2?
      • 1...dxc4
        • 2.Sa4#
      • 1...d4
        • 2.Qxd2#
      • 1...gxf2!
    • 1.Qf4?
      • threat
        • 2.Sa4#
        • 2.Sxd5#
      • 1...dxc4
        • 2.Sa4#
        • 2.Qf6#
      • 1...d4
        • 2.Qxd2#
      • 1...gxf4!
    • 1.Qxc5?
      • threat
        • 2.Sa4#
        • 2.Sxd5#
        • 2.Bxb4#
      • 1...dxc4
        • 2.Sa4#
      • 1...d4
        • 2.Sa4#
        • 2.Sd5#
        • 2.Bxb4#
        • 2.Qxb4#
      • 1...dxc5!
    • 1.Qe7?
      • 1...Kd4
        • 2.Qf6#
        • 2.Qg7#
      • 1...dxc4
        • 2.Qf6#
        • 2.Qg7#
      • 1...d4!
    • 1.Qe8?
      • 1...Kd4
        • 2.Qh8#
      • 1...dxc4
        • 2.Qh8#
      • 1...d4!
  • Keys
    • 1.Qe6!
      • 1...Kd4
        • 2.Qf6#
      • 1...dxc4
        • 2.Qf6#
      • 1...d4
        • 2.Sa4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(h);SBLOCK,XS(E)::S(H)
    • P(h);SBLOCK::QAB1(C),XP(a)
  • Tries
    • Try
      • Q(C);N_PINP(c)
      • Vars
        • P(h);SBLOCK,XS(E)::S(H)
      • Refutation
        • P(h);
    • Try
      • Q(C);N_PINP(c)
      • Vars
        • P(h);SBLOCK,XS(E)::S(H)
        • P(h);SBLOCK::QAB1(C),XP(a)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);SBLOCK::QAB1(C),XP(a)
      • Refutation
        • P(i);XQ(C)
    • Try
      • Q(C);N_PINP(c),XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • P(h);P_SPINP(h),XS(E)::S(H)
      • Refutation
        • P(j);XQ(C)
    • Try
      • Q(C);N_PINP(c)
      • Refutation
        • P(h);
    • Try
      • Q(C);N_PINP(c)
      • Vars
        • K(b);N_SPINR(e),S_FLIGHT::QAB(C)
        • P(h);N_GUARD,XS(E)::QAB(C)
      • Refutation
        • P(h);
  • Actual
    • Q(C);N_PINP(c)
    • Vars
      • K(b);N_SPINR(e),S_FLIGHT::QAB(C)
      • P(h);N_GUARD,XS(E)::QAB(C)
      • P(h);SBLOCK::S(H)
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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).