MESON Chess Problem Database

Problem Display
PID: 156457 (3B4/1p2pN2/pPk2p2/7K/1PP4R/1N3p1B/2n5/r7 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2006

3B4/1p2pN2/pPk2p2/7K/1PP4R/1N3p1B/2n5/r7

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sa5#
    • 1...Rc1
      • 2.Sa5#
    • 1...Rd1
      • 2.Sa5#
    • 1...Re1
      • 2.Sa5#
    • 1...Rf1
      • 2.Sa5#
    • 1...Rg1
      • 2.Sa5#
    • 1...Rh1
      • 2.Sa5#
    • 1...Ra5+
      • 2.Sxa5#
    • 1...Se1
      • 2.Sd4#
    • 1...Sa3
      • 2.Sd4#
      • 2.Sa5#
    • 1...Se3
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...a5
      • 2.b5#
  • Tries
    • 1.Se5+?
      • 1...Kd6
        • 2.Bc7#
      • 1...fxe5!
    • 1.Bc7?
      • threat
        • 2.Sd8#
      • 1...Ra5+
        • 2.Sxa5#
      • 1...f5
        • 2.Se5#
      • 1...Rd1
        • 2.Sa5#
      • 1...e6!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Bd7#
      • 1...Ra5+
        • 2.Sxa5#
      • 1...Sxd4
        • 2.Sxd4#
      • 1...Rh1
        • 2.Sa5#
      • 1...f5
        • 2.Se5#
      • 1...e6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::S(A)
    • R(a);CHECK,N_GUARD::S(A),XR(a)
    • S(b);N_GUARD::S(A)
    • S(b);N_GUARD::S(A),XS(b)
    • P(d);N_GUARD::P(C)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT::B(I)
      • Refutation
        • P(f);XS(H)
    • Try
      • B(I);
      • Threat
        • S(H)
      • Vars
        • R(a);CHECK,N_GUARD::S(A),XR(a)
        • P(f);N_GUARD::S(H)
        • R(a);N_GUARD::S(A)
      • Refutation
        • P(h);
  • Actual
    • R(E);
    • Threat
      • B(B)
    • Vars
      • R(a);CHECK,N_GUARD::S(A),XR(a)
      • S(b);XR(E)::S(A),XS(b)
      • R(a);N_GUARD,P_PINB(B)::S(A)
      • P(f);N_GUARD::S(H)
      • P(h);N_GUARD::R1(E)
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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).