MESON Chess Problem Database

Problem Display
PID: 266577 (8/5Bp1/5BR1/2K2k2/p1nQ2N1/2nP4/2Nb1P2/5Rq1 w - - 0 1)

Subotic, Miroslav

The Problemist, 1997

8/5Bp1/5BR1/2K2k2/p1nQ2N1/2nP4/2Nb1P2/5Rq1

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Qxg4#
    • 1...Be1
      • 2.Rg5#
    • 1...Bf4
      • 2.Qd7#
    • 1...Bg5
      • 2.Rxg5#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sd1
      • 2.Qe4#
    • 1...Sa2
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Se4+
      • 2.Qxe4#
    • 1...Sb5
      • 2.Qe4#
    • 1...Sd5
      • 2.Qe4#
    • 1...Sb2
      • 2.Qe5#
    • 1...Sa3
      • 2.Qe5#
    • 1...Se3
      • 2.Rg5#
      • 2.Qe5#
    • 1...Sa5
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sb6
      • 2.Qe5#
    • 1...Sd6
      • 2.Qe5#
    • 1...gxf6
      • 2.Qxf6#
  • Tries
    • 1.Sce3+?
      • 1...Sxe3
        • 2.Rg5#
        • 2.Qe5#
      • 1...Bxe3!
    • 1.Sge3+?
      • 1...Sxe3
        • 2.Qe5#
      • 1...Bxe3!
    • 1.Qf4+?
      • 1...Bxf4
        • 2.Sd4#
      • 1...Kxf4!
  • Keys
    • 1.f4!
      • threat
        • 2.Rg5#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Se4+
        • 2.dxe4#
      • 1...Qxg4
        • 2.Qd7#
      • 1...gxf6
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 15
  • Sets
    • Q(a);OGATE,XS(F)::QAB1(E),XQ(a)
    • B(b);N_GUARD::R1(I)
    • B(b);SBLOCK::QAB(E)
    • B(b);N_GUARD::R1(I),XB(b)
    • S(c);N_GUARD::QAB1(E)
    • S(c);CHECK,N_GUARD::QAB1(E),XS(c)
    • S(e);N_GUARD::QAR1(E)
    • S(e);N_GUARD::QAR1(E),XS(e)
    • P(g);OGATE,XB(H)::QAR1(E),XP(g)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • B(b);P_PINQ(E),XS(B)
    • Try
      • S(F);CHECK
      • Vars
        • S(e);XS(F)::QAR1(E)
      • Refutation
        • B(b);P_PINQ(E),XS(F)
    • Try
      • Q(E);CHECK,P_SPINP(C)
      • Vars
        • B(b);SBLOCK,XQ(E)::S(B)
      • Refutation
        • K(f);P-FLIGHT,XQ(E)
  • Actual
    • P(C);P_SPINQ(E)
    • Threat
      • R1(I)
    • Vars
      • Q(a);CHECK,XQ(E)::S(B),XQ(a)
      • S(c);CHECK,OGATE::P(D),XS(c)
      • Q(a);N_PINQ(E),XS(F)::QAB(E)
      • P(g);N_GUARD,XB(H)::S(F)
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