MESON Chess Problem Database

Problem Display
PID: 44909 (n5BK/7Q/2pP2p1/2R1Pp2/1P1k1B2/5P1b/8/b1qNN3 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

2nd Prize, Buletin Problemistic, 1992-1993

n5BK/7Q/2pP2p1/2R1Pp2/1P1k1B2/5P1b/8/b1qNN3

#2

11 + 8

3681 FIDE Album (1992-1994) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Be3#
      • 2.Rc4#
    • 1...Qd2
      • 2.Rc4#
    • 1...Qa3
      • 2.Rc4#
    • 1...Qe3
      • 2.Bxe3#
      • 2.Rc4#
    • 1...Qb1
      • 2.Be3#
      • 2.Rc4#
    • 1...Qxd1
      • 2.Rc4#
    • 1...Qc2
      • 2.Be3#
    • 1...Qc4
      • 2.Be3#
      • 2.Rxc4#
    • 1...Bc3
      • 2.Rc4#
  • Tries
    • 1.Qh4?
      • threat
        • 2.Be3#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Qxd1
        • 2.Rc4#
        • 2.Qf2#
      • 1...Qxc5
        • 2.Qf2#
      • 1...Qe3
        • 2.Bxe3#
        • 2.Rc4#
      • 1...Bg4!
    • 1.Qa7?
      • threat
        • 2.Rc4#
      • 1...Qxf4
        • 2.Qxa1#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Qc4
        • 2.Be3#
        • 2.Rxc4#
        • 2.Rd5#
      • 1...Sb6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.e6#
      • 1...Qxf4
        • 2.Rc4#
      • 1...Qxc5
        • 2.Be3#
      • 1...Qe3
        • 2.Bxe3#
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::R1(F)
    • Q(b);N_GUARD,XS(A)::R1(F)
    • Q(b);N_GUARD::B(E)
    • B(a);S_CUTQ(b)::R1(F)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR(I)+B(E),DCHECK
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR2(I),XQ(b)
        • Q(b);N_GUARD,XR(F)::QAB(I)
      • Refutation
        • B(c);
    • Try
      • Q(I);
      • Threat
        • QAB(I)+R(F),DCHECK
      • Vars
        • Q(b);N_GUARD,XB(E)::QAB(I),XB(a)
        • Q(b);OGATE,P_SPINQ(b),XR(F)::QAB1(I),XQ(b)
      • Refutation
        • S(h);
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+P(G)
    • Vars
      • Q(b);N_GUARD,XB(E)::R1(F)
      • Q(b);N_GUARD,XR(F)::B(E)
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).