MESON Chess Problem Database

Problem Display
PID: 265515 (8/4QK2/2p5/N4P2/3k4/2r5/1n2P3/1N5B w - - 0 1)

Ivtschenko, Vladimir

Die Schwalbe, 1972

8/4QK2/2p5/N4P2/3k4/2r5/1n2P3/1N5B

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Qd6#
    • 1...Rc4
      • 2.Sb3#
    • 1...Rc5
      • 2.Qe4#
    • 1...Sd3
      • 2.e3#
    • 1...Sc4
      • 2.Sxc6#
    • 1...c5
      • 2.Qe4#
  • Tries
    • 1.Sxc6+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Rxc6!
    • 1.e3+?
      • 1...Rxe3
        • 2.Qd6#
      • 1...Kd3!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Qe5#
      • 1...Re3
        • 2.Qd6#
      • 1...Rc5
        • 2.Qe4#
      • 1...Sd3
        • 2.e3#
      • 1...Sc4
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(b);SBLOCK::QAR2(F)
    • R(b);N_GUARD,SBLOCK::S(D)
    • R(b);SBLOCK::QAR1(F)
    • S(a);SBLOCK,S_CUTR(b)::P(C)
    • S(a);SBLOCK,S_CUTR(b)::S(D),XP(d)
    • P(d);SBLOCK::QAR1(F)
  • Tries
    • Try
      • S(D);CHECK,XP(d)
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR1(F)
      • Refutation
        • R(b);XS(D)
    • Try
      • P(C);CHECK
      • Vars
        • R(b);SBLOCK,XP(C)::QAR2(F)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • K(G);P-FLIGHT
    • Threat
      • QAB1(F)
    • Vars
      • R(b);SBLOCK::QAR2(F)
      • R(b);SBLOCK::QAR1(F)
      • S(a);SBLOCK,S_CUTR(b)::P(C)
      • S(a);SBLOCK,S_CUTR(b)::S(D),XP(d)
HTML5 logo

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).