MESON Chess Problem Database

Problem Display
PID: 105377 (4N3/r4p2/1RpBp3/3kp1n1/p5P1/N1P2qP1/1P2P3/1B1K2nQ w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Salai (Snr), Ladislav

Sachove umeni (Ceskoslovensky sach), 1983

4N3/r4p2/1RpBp3/3kp1n1/p5P1/N1P2qP1/1P2P3/1B1K2nQ

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Ba2#
    • 1...Se4
      • 2.Ba2#
    • 1...e4
      • 2.Ba2#
    • 1...c5
      • 2.Sf6#
  • Tries
    • 1.Rb5+?
      • 1...c5
        • 2.Rxc5#
      • 1...cxb5!
    • 1.Qxf3+?
      • 1...S5xf3
        • 2.e4#
      • 1...Se4
        • 2.Ba2#
        • 2.Bxe4#
        • 2.Qxe4#
        • 2.Qd3#
      • 1...e4
        • 2.Ba2#
      • 1...S1xf3!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Se3#
      • 1...Kc4
        • 2.Ba2#
      • 1...Ke4
        • 2.Sf6#
      • 1...Se4
        • 2.Ba2#
      • 1...e4
        • 2.Ba2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_PINP(E)::B(A)
    • S(f);N_SPINQ(b),SBLOCK::B(A)
    • P(e);N_SPINQ(b),SBLOCK::B(A)
    • P(g);::S(L)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • P(g);P_SPINP(g)::R1(J),XP(g)
      • Refutation
        • P(g);XR(J)
    • Try
      • Q(C);CHECK,N_SPINP(E),XQ(b)
      • Vars
        • S(f);N_GUARD,XQ(C)::P(E)
        • P(e);P_SPINP(e)::B(A)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);N_SPINQ(b),S_FLIGHT::B(A)
      • K(d);S_FLIGHT::S(L)
      • S(f);N_SPINQ(b),SBLOCK::B(A)
      • P(e);N_SPINQ(b),SBLOCK::B(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).