MESON Chess Problem Database

Problem Display
PID: 46520 (Q7/1p2N2B/1K4R1/3Np3/P1pk2p1/1n3P2/2P1R3/3nr1q1 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Shedey, Sergey Oleksandrovich

2nd Prize, Ranok, 1984

Q7/1p2N2B/1K4R1/3Np3/P1pk2p1/1n3P2/2P1R3/3nr1q1

#2

10 + 9

4393 Uralski Problemist 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Re4#
    • 1...Sa1
      • 2.Rd2#
    • 1...Sd2
      • 2.Rxd2#
    • 1...Sa5
      • 2.Rd2#
    • 1...e4
      • 2.Qh8#
  • Tries
    • 1.Rxg4+?
      • 1...e4
        • 2.Rgxe4#
        • 2.Qh8#
      • 1...Qxg4!
    • 1.Qa5?
      • threat
        • 2.Sf5#
      • 1...Sxa5
        • 2.Rd2#
      • 1...c3
        • 2.Qb4#
      • 1...Se3
        • 2.Qc3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e4!
    • 1.Qd8?
      • threat
        • 2.Sf5#
      • 1...c3
        • 2.Se3#
      • 1...e4
        • 2.Qh8#
      • 1...Se3!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sf5#
      • 1...c3
        • 2.Se3#
      • 1...e4
        • 2.Qh8#
      • 1...Se3
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::R1(B)
    • S(d);N_GUARD::R(B)
    • S(d);N_GUARD::R(B),XS(d)
    • P(h);OGATEB::QAB(J)
  • Tries
    • Try
      • R(G);CHECK,XP(g)
      • Refutation
        • Q(c);XR(G)
    • Try
      • Q(J);
      • Threat
        • S(H)
      • Vars
        • S(d);N_GUARD,XQ(J)::R(B)
        • P(e);OGATEB::QAR2(J)
        • S(a);N_GUARD::QAB1(J)
        • S(d);N_GUARD::QAB1(J),XS(d)
      • Refutation
        • P(h);
    • Try
      • Q(J);
      • Threat
        • S(H)
      • Vars
        • P(e);SBLOCK::QAR(J)+S(E)
        • P(h);OGATEB::QAB(J)
      • Refutation
        • S(a);
  • Actual
    • R(G);
    • Threat
      • S(H)
    • Vars
      • P(e);SBLOCK::R(G)+S(E)
      • P(h);OGATEB::QAB(J)
      • S(a);N_GUARD::P(A)
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).