MESON Chess Problem Database

Problem Display
PID: 269027 (5B1K/8/1n1p4/r1NNkB2/R2p2Qp/rb6/3n1q2/8 w - - 0 1)

Melnikov, Vladimir N

Shakhmatnaya kompozitsiya, 1997

5B1K/8/1n1p4/r1NNkB2/R2p2Qp/rb6/3n1q2/8

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qxd4#
    • 1...Bxd5
      • 2.Bg7#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sf1
      • 2.Qe4#
    • 1...Sf3
      • 2.Qe4#
    • 1...Sdc4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sxd5
      • 2.Sd7#
  • Tries
    • 1.Qxd4+?
      • 1...Kxf5
        • 2.Qf6#
      • 1...Qxd4!
    • 1.Qf4+?
      • 1...Kxd5
        • 2.Qxd6#
      • 1...Qxf4!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qe6#
      • 1...Kxd5
        • 2.Qxd6#
      • 1...Qxf5
        • 2.Qxd6#
      • 1...Bxd5
        • 2.Bxd6#
      • 1...Sxd5
        • 2.Sd3#
        • 2.Bxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD,SBLOCK,XB(E)::QAB1(B),XP(e)
    • B(d);SBLOCK,XS(D)::B(F)
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • S(i);N_GUARD,SBLOCK,XS(D)::S(C)
  • Tries
    • Try
      • Q(B);CHECK,XP(e)
      • Vars
        • K(h);OGATE,P-FLIGHT,XB(E)::QAR1(B)
      • Refutation
        • Q(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(h);OGATE,P-FLIGHT,XS(D)::QAR1(B),XP(j)
      • Refutation
        • Q(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(h);N_GUARD,P-FLIGHT,XS(D)::QAR1(B),XP(j)
      • Q(b);SBLOCK,XB(E)::QAB1(B),XP(j)
      • B(d);SBLOCK,XS(D)::B(F),XP(j)
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