MESON Chess Problem Database

Problem Display
PID: 147903 (q7/2N5/1B2Q3/p2n3p/1pk2p2/1rp1P3/2P3bK/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

1/2 Prize, Uralski Problemist, 2008

q7/2N5/1B2Q3/p2n3p/1pk2p2/1rp1P3/2P3bK/8

#2

6 + 10

145 StrateGems 2011
23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qxc6#
    • 1...Qa6
      • 2.Qc6#
    • 1...Qa7
      • 2.Qc6#
    • 1...Qb8
      • 2.Qc6#
    • 1...Qc8
      • 2.Qc6#
    • 1...Qd8
      • 2.Qc6#
    • 1...Qg8
      • 2.Qc6#
    • 1...Qh8
      • 2.Qc6#
    • 1...Bf1
      • 2.Qe4#
    • 1...Bh3
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...f3
      • 2.Qe4#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qb5#
      • 1...Sxc7
        • 2.Qd3#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qa6
        • 2.Qc6#
      • 1...Qe8!
    • 1.Qe5?
      • threat
        • 2.Qd4#
      • 1...Sxc7
        • 2.Qc5#
      • 1...Qh8!
    • 1.Qd6?
      • threat
        • 2.Qc5#
      • 1...Sxb6
        • 2.Qd4#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qf8!
    • 1.Qg6?
      • threat
        • 2.Qd3#
      • 1...Bf1
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sxb6!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qd3#
      • 1...Sxb6
        • 2.Qb5#
      • 1...Bf1
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(j);N_GUARD::QAR2(E),XQ(j)
    • Q(j);N_GUARD::QAR2(E)
    • B(a);N_GUARD::QAR2(E)
    • B(a);N_GUARD::QAR2(E),XB(a)
    • P(f);S_CUTB(a)::QAR2(E)
  • Tries
    • Try
      • Q(E);N_PINS(h)
      • Threat
        • QAB1(E)
      • Vars
        • S(h);OGATE,XS(F)::QAB1(E)
        • Q(j);N_GUARD::QAR2(E),XQ(j)
        • Q(j);N_GUARD::QAR2(E)
      • Refutation
        • Q(j);
    • Try
      • Q(E);N_PINS(h)
      • Threat
        • QAR1(E)
      • Vars
        • S(h);OGATE,XS(F)::QAR1(E)
      • Refutation
        • Q(j);
    • Try
      • Q(E);N_PINS(h)
      • Threat
        • QAR1(E)
      • Vars
        • S(h);OGATE,XB(D)::QAR1(E)
        • Q(j);N_GUARD::QAR2(E),XQ(j)
      • Refutation
        • Q(j);
    • Try
      • Q(E);N_PINS(h)
      • Threat
        • QAB1(E)
      • Vars
        • B(a);N_GUARD::QAR2(E)
        • B(a);N_GUARD::QAR2(E),XB(a)
      • Refutation
        • S(h);XB(D)
  • Actual
    • Q(E);N_PINS(h)
    • Threat
      • QAB1(E)
    • Vars
      • S(h);OGATE,XB(D)::QAB1(E)
      • B(a);N_GUARD::QAR2(E)
      • B(a);N_GUARD::QAR2(E),XB(a)
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