MESON Chess Problem Database

Problem Display
PID: 142601 (1n3QN1/2b3K1/1p2r1p1/p3k2p/3R1R1r/1pqppP2/1N6/B7 w - - 0 1)

Rossomakho, Yakov V

Phenix, 1990

1n3QN1/2b3K1/1p2r1p1/p3k2p/3R1R1r/1pqppP2/1N6/B7

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sxd3#
      • 2.Sc4#
    • 1...Qd2
      • 2.Sc4#
    • 1...Qb4
      • 2.Sxd3#
    • 1...Qc1
      • 2.Sxd3#
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qc5
      • 2.Sxd3#
    • 1...Qc6
      • 2.Sxd3#
    • 1...Rh1
      • 2.Rfe4#
    • 1...Rh2
      • 2.Rfe4#
    • 1...Rh3
      • 2.Rfe4#
    • 1...Rxf4
      • 2.Qxf4#
    • 1...Rf6
      • 2.Qxf6#
    • 1...Re7+
      • 2.Qxe7#
    • 1...Re8
      • 2.Qf6#
      • 2.Qxe8#
    • 1...g5
      • 2.Qf5#
  • Tries
    • 1.Se7?
      • threat
        • 2.Rd5#
      • 1...Rxe7+
        • 2.Qxe7#
      • 1...Qxd4
        • 2.Sc4#
      • 1...Rd6
        • 2.Rde4#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qc5
        • 2.Sxd3#
      • 1...Qc6
        • 2.Sxd3#
      • 1...Rc6!
    • 1.Qc5+?
      • 1...Qxc5
        • 2.Sxd3#
      • 1...bxc5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rde4#
      • 1...Re7+
        • 2.Qxe7#
      • 1...Qxd4
        • 2.Sxd3#
      • 1...Rxf4
        • 2.Rd5#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Qb4
        • 2.Sxd3#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qc6
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD::S(B)
    • Q(b);N_GUARD::S(B),XP(c)
    • Q(b);N_GUARD::S(B),XQ(b)
    • R(e);N_GUARD::R1(E)
    • R(e);OGATE,XR(E)::QAB1(G),XR(e)
    • R(j);N_GUARD::QAB1(G),XR(j)
    • R(j);CHECK,OGATEB::QAR2(G),XR(j)
    • P(k);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(H);
      • Threat
        • R1(D)
      • Vars
        • R(j);CHECK,OGATE,XS(H)::QAR2(G),XR(j)
        • Q(b);N_GUARD,XR(D)::S(B)
        • R(j);SBLOCK::R1(D)
        • R(j);N_GUARD::QAB1(G),XR(j)
        • Q(b);N_GUARD::S(B),XQ(b)
        • Q(b);N_GUARD::S(B),XP(c)
      • Refutation
        • R(j);
    • Try
      • Q(G);CHECK
      • Vars
        • Q(b);XQ(G)::S(B),XP(c)
      • Refutation
        • P(i);XQ(G)
  • Actual
    • S(H);
    • Threat
      • R1(D)
    • Vars
      • R(j);CHECK,OGATEB::QAR2(G),XR(j)
      • Q(b);N_GUARD,XR(D)::S(B),XP(c)
      • R(e);SBLOCK,XR(E)::R1(D)
      • R(j);OGATE,XS(H)::QAB1(G),XR(j)
      • Q(b);N_GUARD::S(B),XP(c)
      • Q(b);N_GUARD::S(B),XQ(b)
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).