MESON Chess Problem Database

Problem Display
PID: 267687 (8/4NPQ1/8/2p2N2/4p3/2Pk2P1/1K4R1/8 w - - 0 1)

Fedoseev, V

Shakhmatnaya kompozitsiya, 1993

8/4NPQ1/8/2p2N2/4p3/2Pk2P1/1K4R1/8

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Se3?
      • 1...c4
        • 2.Qd4#
      • 1...Kxe3!
    • 1.Sd6?
      • 1...e3
        • 2.Qg6#
        • 2.Qh7#
      • 1...c4
        • 2.Qd4#
      • 1...Ke3!
    • 1.Rd2+?
      • 1...Kc4
        • 2.Sd6#
      • 1...Kxd2!
    • 1.Qf6?
      • 1...Kc4
        • 2.Qa6#
      • 1...c4
        • 2.Qd4#
        • 2.Qd6#
      • 1...e3!
    • 1.Qh6?
      • 1...Kc4
        • 2.Qa6#
      • 1...c4
        • 2.Rd2#
        • 2.Qd2#
        • 2.Qe3#
        • 2.Qd6#
      • 1...e3!
    • 1.Qg4?
      • threat
        • 2.Qe2#
      • 1...Kc4
        • 2.Qe2#
      • 1...e3!
  • Keys
    • 1.Qg6!
      • 1...Kc4
        • 2.Qa6#
      • 1...e3
        • 2.Sd6#
      • 1...c4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR1(H)
  • Tries
    • Try
      • S(E);
      • Vars
        • P(c);N_GUARD::QAR1(H)
      • Refutation
        • K(a);P-FLIGHT,XS(E)
    • Try
      • S(E);
      • Vars
        • P(c);N_GUARD::QAR1(H)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(E)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(H);
      • Vars
        • K(a);S_CUTP(c),S_FLIGHT::QAB(H)
      • Refutation
        • P(b);
    • Try
      • Q(H);
      • Vars
        • K(a);S_CUTP(c),S_FLIGHT::QAB(H)
      • Refutation
        • P(b);
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB(H)
      • Refutation
        • P(b);
  • Actual
    • Q(H);
    • Vars
      • K(a);S_CUTP(c),S_FLIGHT::QAB(H)
      • P(b);SBLOCK::QAB(H)+S(E)
      • P(c);SBLOCK::QAR(H)
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).