MESON Chess Problem Database

Problem Display
PID: 15692 (b1q1Qn2/3p4/3b4/8/R1B1N1pP/4Nk2/2PP1P2/4K3 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

1st Prize, Chess Life, 1987

b1q1Qn2/3p4/3b4/8/R1B1N1pP/4Nk2/2PP1P2/4K3

#2

10 + 7

702 Phenix 1988
3297 FIDE Album (1986-1988) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Be2#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Be2#
      • 1...Kf4
        • 2.Bd5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Qa6!
    • 1.Bd5?
      • threat
        • 2.Sg5#
      • 1...Kf4
        • 2.Sc5#
      • 1...Bb4
        • 2.Qf7#
      • 1...Qc4!
    • 1.Qg6?
      • threat
        • 2.Qxg4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Bf4
        • 2.Be2#
      • 1...g3
        • 2.Qg4#
      • 1...Sxg6!
    • 1.Qf7+?
      • 1...Bf4
        • 2.Sg5#
        • 2.Be2#
      • 1...Kxe4!
    • 1.Qe5?
      • threat
        • 2.Sg5#
        • 2.Be2#
      • 1...Qxc4
        • 2.Sg5#
      • 1...Bxe4
        • 2.Be2#
      • 1...Qa6
        • 2.Sg5#
      • 1...Qd8
        • 2.Be2#
      • 1...Be7
        • 2.Be2#
        • 2.Qf5#
      • 1...Se6
        • 2.Be2#
      • 1...Sh7
        • 2.Be2#
      • 1...Bxe5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qxg4#
      • 1...Kxe4
        • 2.Bd5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Bf4
        • 2.Be2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::B(G)
  • Tries
    • Try
      • S(H);
      • Threat
        • B(G)
      • Vars
        • K(a);P-FLIGHT::R(F)+B(G)
        • B(e);N_GUARD::QAB1(J),XB(e)
      • Refutation
        • Q(f);
    • Try
      • B(G);
      • Threat
        • B(G)+S(H),DCHECK
      • Vars
        • K(a);P-FLIGHT::R(F)+S(H)
        • B(c);N_GUARD,P_PINP(C)::QAR(J)
      • Refutation
        • Q(f);
    • Try
      • Q(J);
      • Threat
        • QAB1(J),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(J)
        • B(c);SBLOCK::B(G)
        • P(b);::QAB1(J)
      • Refutation
        • S(g);XQ(J)
    • Try
      • Q(J);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(H)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);XB(G)::S(H)
        • B(e);XS(H)::B(G)
        • Q(f);::S(H)
        • Q(f);::B(G)
        • S(g);::B(G)
      • Refutation
        • B(c);XQ(J)
  • Actual
    • Q(J);P_PINP(b)
    • Threat
      • QAB1(J),XP(b)
    • Vars
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(H)::R(F)+B(G),DCHECK
      • K(a);N_SPINP(b),P-FLIGHT::QAR1(J)
      • B(c);SBLOCK::B(G)
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