MESON Chess Problem Database

Problem Display
PID: 8136 (1r6/B2pRN1q/Nnp5/K4p2/R1PkP3/3pn3/BP6/6Q1 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

2nd Place, Suomen Shakki, 1995

1r6/B2pRN1q/Nnp5/K4p2/R1PkP3/3pn3/BP6/6Q1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qg7#
    • 1...Qh3
      • 2.Qg7#
    • 1...Qh5
      • 2.Qg7#
    • 1...Qg7
      • 2.Qxg7#
    • 1...fxe4
      • 2.Rxd7#
    • 1...d5
      • 2.cxd5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Sb3#
      • 1...Sxc4+
        • 2.Rxc4#
      • 1...Kxc5
        • 2.Qxe3#
      • 1...Sxa4
        • 2.Rxd7#
      • 1...d2!
    • 1.Bxb6+?
      • 1...c5
        • 2.Bxc5#
      • 1...Rxb6!
    • 1.c5+?
      • 1...Sc4+
        • 2.Rxc4#
      • 1...Sxa4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qc3#
      • 1...Sxc4+
        • 2.Rxc4#
      • 1...d2
        • 2.Qxd2#
      • 1...Sd1
        • 2.Rxd7#
      • 1...Sf1
        • 2.Rxd7#
      • 1...Sc2
        • 2.Rxd7#
      • 1...Sg2
        • 2.Rxd7#
      • 1...Sg4
        • 2.Rxd7#
      • 1...Sd5
        • 2.cxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • Q(h);N_GUARD::QAB(A)
    • Q(h);N_GUARD::QAB(A),XQ(h)
    • P(d);SBLOCK,XP(F)::R(J),XP(g)
    • P(g);OGATE::R(D)+P(E),XP(g)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • S(e);CHECK,OGATE,XP(E)::R1(D),XS(e)
        • K(c);S_FLIGHT,XS(H)::QAB(A),XS(b)
        • S(e);N_GUARD,XR(D)::R(J),XP(g)
      • Refutation
        • P(a);
    • Try
      • B(I);CHECK,XS(e)
      • Vars
        • P(f);P_SPINP(f)::B(I),XP(f)
      • Refutation
        • R(i);XB(I)
    • Try
      • P(E);CHECK
      • Vars
        • S(e);CHECK,N_GUARD::R1(D),XS(e)
      • Refutation
        • S(e);XR(D)
  • Actual
    • Q(A);N_PINS(b),P_PINS(e)
    • Threat
      • QAB1(A)
    • Vars
      • S(b);CHECK,N_SPINS(e),OGATE,P_SPINS(b),XP(E)::R1(D),XS(b)
      • P(a);OGATEB::QAR2(A),XP(a)
      • S(b);N_GUARD::R(J),XP(g)
      • S(b);OGATE::R(D)+P(E),XS(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).