MESON Chess Problem Database

Problem Display
PID: 152859 (3n2KB/2qP3B/4P1RP/2p1PkPr/4p1pb/6p1/Q3N1P1/8 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Schweizerische Schachzeitung, 2000

3n2KB/2qP3B/4P1RP/2p1PkPr/4p1pb/6p1/Q3N1P1/8

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Rg7#
    • 1...Sxe6
      • 2.Qxe6#
    • 1...e3
      • 2.Qb1#
      • 2.Qc2#
  • Tries
    • 1.Sxg3+?
      • 1...Kf4
        • 2.Qf2#
      • 1...Bxg3!
    • 1.Bf6?
      • threat
        • 2.Rg7#
      • 1...Rxg5
        • 2.Rxg5#
      • 1...Rxh6
        • 2.Rxh6#
      • 1...c4!
    • 1.Qd2?
      • threat
        • 2.Qf4#
      • 1...Qxe5
        • 2.Rf6#
      • 1...Bxg5
        • 2.Sxg3#
      • 1...e3
        • 2.Qc2#
        • 2.Qd3#
      • 1...Sxe6!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qf1#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Bxg5
        • 2.Rf6#
      • 1...Sxe6
        • 2.Rg7#
      • 1...e3
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(h);SBLOCK,XP(D)::B(J)+R(G)
    • S(i);OGATE,XP(F)::QAB1(A),XS(i)
  • Tries
    • Try
      • S(B);CHECK,XP(a)
      • Vars
        • K(f);P-FLIGHT::QAR2(A)
      • Refutation
        • B(d);XS(B)
    • Try
      • B(L);
      • Threat
        • B(J)+R(G)
      • Vars
        • R(g);OGATE,P_PINR(G),XP(E)::B(J)+R(G),DCHECK,XR(g)
        • R(g);OGATE,XP(H)::B(J)+R(G),XR(g)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(h);SBLOCK,XP(D)::B(J)+R(G),DCHECK
        • B(d);N_GUARD,XP(E)::S(B),XP(a)
      • Refutation
        • S(i);XP(F)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • Q(h);OGATE,XP(D)::QAR1(A),XQ(h)
      • B(d);SBLOCK,XP(E)::B(J)+R(G),DCHECK
      • S(i);SBLOCK,XP(F)::B(J)+R(G)
      • P(b);OGATEB::QAB(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).