MESON Chess Problem Database

Problem Display
PID: 33692 (R7/2Ppk1p1/1KnN2b1/3BBpPn/8/1pQ5/8/5r2 w - - 0 1)

Chepizhni, Viktor Ivanovich

2nd HM., The Problemist, 2001

R7/2Ppk1p1/1KnN2b1/3BBpPn/8/1pQ5/8/5r2

#2

8 + 9

56 The Problemist 2003
6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Re8#
    • 1...Be8
      • 2.Rxe8#
    • 1...Sxe5
      • 2.Qxe5#
    • 1...Sd8
      • 2.cxd8Q#
  • Tries
    • 1.Rg8?
      • threat
        • 2.Sc8#
        • 2.c8S#
      • 1...Be8
        • 2.Sc8#
        • 2.Rxe8#
      • 1...Sa7!
    • 1.Rh8?
      • threat
        • 2.Sc8#
        • 2.c8S#
      • 1...Be8
        • 2.Sc8#
        • 2.Rxe8#
      • 1...Sa7!
    • 1.Qc5?
      • threat
        • 2.Sxf5#
      • 1...Sd8
        • 2.cxd8Q#
      • 1...f4
        • 2.Sf5#
      • 1...Sb8!
    • 1.c8Q?
      • threat
        • 2.Qf8#
      • 1...Be8
        • 2.Qxe8#
      • 1...Sd8
        • 2.Qxd8#
      • 1...Sb8!
  • Keys
    • 1.Bxg7!
      • threat
        • 2.Bf8#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Sxg7
        • 2.Qf6#
      • 1...Be8
        • 2.Sc8#
      • 1...Sb8
        • 2.Qe5#
      • 1...Sd8
        • 2.c8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(f);N_GUARD::R1(H)
    • B(f);N_GUARD::R1(H),XB(f)
    • S(e);OGATE,XB(C)::QAR2(A),XS(e)
    • S(e);OGATE::PXS(e)=Q
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Refutation
        • S(e);
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Refutation
        • S(e);
    • Try
      • Q(A);
      • Threat
        • QAB(A)+S(F),DCHECK,XP(c)
      • Vars
        • S(e);OGATE::PXS(e)=Q
        • P(c);::QAB(A)+S(F),DCHECK
      • Refutation
        • S(e);
    • Try
      • P(G);
      • Threat
        • QAB1(G)
      • Vars
        • B(f);N_GUARD::QAR1(G),XB(f)
        • S(e);N_GUARD::QAB1(G),XS(e)
      • Refutation
        • S(e);
  • Actual
    • B(C);XP(i)
    • Threat
      • B(C)
    • Vars
      • K(h);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
      • S(d);N_GUARD,XB(C)::QAB1(A)
      • B(f);SBLOCK::S(F)
      • S(e);N_GUARD::QAR2(A)
      • S(e);SBLOCK::P=S
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