MESON Chess Problem Database

Problem Display
PID: 287520 (3bn3/n3RPB1/3kB1Kp/8/b4NpQ/rp6/8/2R5 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Mat, 1987

3bn3/n3RPB1/3kB1Kp/8/b4NpQ/rp6/8/2R5

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Rxd7#
    • 1...Sb5
      • 2.Rd7#
      • 2.fxe8S#
    • 1...Sc6
      • 2.Rd7#
      • 2.fxe8S#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qg3#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...Sc6
        • 2.fxe8S#
      • 1...g3
        • 2.Qxg3#
        • 2.Qb4#
        • 2.Qf4#
      • 1...b2!
    • 1.Qf2?
      • threat
        • 2.Qc5#
      • 1...Kxe7
        • 2.f8Q#
        • 2.f8B#
      • 1...Bb6!
    • 1.Qg5?
      • threat
        • 2.Be5#
        • 2.Qc5#
      • 1...Sxg7
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#
      • 1...Bb6
        • 2.Be5#
      • 1...Sc6
        • 2.Rd7#
        • 2.Qc5#
        • 2.fxe8S#
      • 1...hxg5!
    • 1.Qh5?
      • threat
        • 2.Qc5#
      • 1...Kxe7
        • 2.f8Q#
        • 2.f8B#
      • 1...Bb6!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Sd5#
      • 1...Kxe7
        • 2.f8Q#
        • 2.f8B#
      • 1...Bxe7
        • 2.Qd3#
      • 1...Sc6
        • 2.Rd7#
      • 1...b2
        • 2.Qxa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::R1(F),XB(c)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB(C)
      • Vars
        • B(h);OGATE,XR(F)::QAB1(C),XB(h)
        • S(g);S_CUTB(c)::PXS(i)=S
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(e);S_FLIGHT,XR(F)::P=Q
      • Refutation
        • B(h);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);XB(H)::QAB1(C)
        • S(i);::QAB1(C)
        • B(h);::B(H)
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(e);S_FLIGHT,XR(F)::P=Q
      • Refutation
        • B(h);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+S(B)
    • Vars
      • K(e);S_FLIGHT,XR(F)::P=Q
      • B(h);SBLOCK,XR(F)::QAR(C)
      • S(g);S_CUTB(c)::R1(F)
      • P(b);OGATE::QAB(C),XR(a)
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