MESON Chess Problem Database

Problem Display
PID: 59807 (3QNBr1/1nPPN1PR/qR1pknP1/1B2p3/b3P3/7K/8/8 w - - 0 1)

Kostadinov, Diyan

StrateGems, 2005

3QNBr1/1nPPN1PR/qR1pknP1/1B2p3/b3P3/7K/8/8

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg7
      • 2.Sxg7#
    • 1...Rxf8
      • 2.gxf8S#
    • 1...Sd5
      • 2.exd5#
    • 1...Sxd7
      • 2.Qxd7#
    • 1...Sxd8
      • 2.cxd8S#
  • Tries
    • 1.Bc4+?
      • 1...Sd5
        • 2.Bxd5#
        • 2.exd5#
      • 1...Qxc4!
    • 1.c8Q?
      • threat
        • 2.Sc7#
      • 1...Sxe4
        • 2.Qc4#
      • 1...Sxd7
        • 2.Qcxd7#
        • 2.Qc4#
        • 2.Qdxd7#
      • 1...Sxh7
        • 2.Qc4#
      • 1...Sxe8
        • 2.dxe8S#
      • 1...Sd5
        • 2.exd5#
      • 1...Sg4
        • 2.Qc4#
      • 1...Sh5
        • 2.Qc4#
      • 1...Qxb6!
  • Keys
    • 1.Qc8!
      • threat
        • 2.d8S#
      • 1...Rxf8
        • 2.gxf8S#
      • 1...Sxe4
        • 2.d8Q#
        • 2.d8S#
        • 2.d8B#
        • 2.d8R#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Sxh7
        • 2.d8Q#
        • 2.d8S#
        • 2.d8B#
        • 2.d8R#
      • 1...Sxe8
        • 2.dxe8S#
      • 1...Sd5
        • 2.exd5#
        • 2.d8Q#
        • 2.d8S#
        • 2.d8B#
        • 2.d8R#
      • 1...Sg4
        • 2.d8Q#
        • 2.d8S#
        • 2.d8B#
        • 2.d8R#
      • 1...Sh5
        • 2.d8Q#
        • 2.d8S#
        • 2.d8B#
        • 2.d8R#
      • 1...Sd8
        • 2.cxd8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(h);XP(I)::S(L),XR(h)
    • R(h);OGATE,XB(M)::PXR(h)=S
    • S(f);OGATE::P(B),XS(f)
    • S(f);OGATE,XP(G)::QAB1(K),XS(f)
    • S(g);OGATE,XQ(K)::PXS(g)=S
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • Q(c);XB(C)
    • Try
      • P(F);
      • Threat
        • S(L)
      • Vars
        • S(f);N_GUARD,XP(B)::QAB(F)
        • S(f);N_GUARD,XR(J)::QAB(F)
        • S(f);OGATE,XS(L)::PXS(f)=S
        • S(f);OGATE::P(B),XS(f)
        • S(f);N_GUARD::QAB(F)
      • Refutation
        • Q(c);N_SPINP(d),XR(D)
  • Actual
    • Q(K);
    • Threat
      • P=S
    • Vars
      • R(h);OGATE,XB(M)::PXR(h)=S
      • S(f);OGATE,P_SPINS(f),XP(G)::QAB1(K),XS(f)
      • S(f);OGATE,XS(L)::PXS(f)=S
      • S(g);OGATE::PXS(g)=S
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