MESON Chess Problem Database

Problem Display
PID: 52486 (k5b1/1N2R1rn/1P2Q1r1/1K2B3/7b/3n1Rpq/6B1/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

3rd HM., Het Belgisch Schaakbord (L'Echiquier Belge), 1986-1987

k5b1/1N2R1rn/1P2Q1r1/1K2B3/7b/3n1Rpq/6B1/8

#2

8 + 9

5110 Bekroonde Problemen 2002
6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2
      • 2.Qc8#
    • 1...Qh1
      • 2.Qc8#
    • 1...Qh2
      • 2.Qc8#
    • 1...Rg4
      • 2.Qc8#
    • 1...Rf7
      • 2.Qa2#
    • 1...Sc1
      • 2.Ra3#
    • 1...Se1
      • 2.Ra3#
    • 1...Sf2
      • 2.Ra3#
    • 1...Sf4
      • 2.Ra3#
    • 1...Sg5
      • 2.Rf8#
    • 1...Sf8
      • 2.Rxf8#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Ra3#
        • 2.Rd8#
      • 1...Qxe6
        • 2.Ra3#
      • 1...Bxe6
        • 2.Ra3#
      • 1...Qg4
        • 2.Rd8#
      • 1...Rg4
        • 2.Rd8#
        • 2.Qc8#
      • 1...Bxe7!
    • 1.Re8+?
      • 1...Kxb7
        • 2.Rf7#
        • 2.Rb8#
      • 1...Bd8!
    • 1.Qxg8+?
      • 1...Qc8
        • 2.Qa2#
        • 2.Qxc8#
      • 1...Sf8
        • 2.Qa2#
      • 1...Rxg8!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rf8#
      • 1...Qxg2
        • 2.Qc8#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Rf6
        • 2.Re8#
      • 1...Rf7
        • 2.Qa2#
      • 1...Bf6
        • 2.Qc6#
      • 1...Bf7
        • 2.Ra7#
      • 1...Sf4
        • 2.Ra3#
      • 1...Sf6
        • 2.Qc6#
      • 1...Sf8
        • 2.Rxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD,XB(A)::QAR2(F)
    • Q(c);N_GUARD::QAR2(F)
    • R(e);S_CUTQ(c)::QAR2(F)
    • R(f);S_CUTB(i)::QAR(F)
    • S(a);OGATE::R(B)
    • S(g);N_GUARD::R(B)
    • S(g);N_GUARD::R(B),XS(g)
  • Tries
    • Try
      • R(B);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XQ(F)::R(B)
        • B(i);XQ(F)::R(B)
        • Q(c);::R(B)
      • Refutation
        • B(d);XR(H)
    • Try
      • R(H);CHECK
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(F);CHECK,XB(i)
      • Vars
        • S(g);P_SPINS(g)::QAR(F)
      • Refutation
        • R(f);XQ(F)
  • Actual
    • S(G);
    • Threat
      • B(A)+R(B),DCHECK
    • Vars
      • Q(c);N_GUARD,XB(A)::QAR2(F)
      • Q(c);N_GUARD::B(A)+R(B),XQ(c)
      • R(e);S_CUTB(d)::R(H)
      • R(f);S_CUTB(i)::QAR(F)
      • B(d);S_CUTR(e)::QAB(F)
      • B(i);S_CUTR(f)::R1(H)
      • S(a);OGATE::B(A)+R(B),DCHECK
      • S(g);S_CUTR(e)::QAB(F)
      • S(g);::B(A)+R(B),DCHECK,XS(g)
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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).