MESON Chess Problem Database

Problem Display
PID: 264855 (8/5N2/4Q3/2p2p2/3k2p1/8/3K4/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

The Problemist, 1993

8/5N2/4Q3/2p2p2/3k2p1/8/3K4/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qe5#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sb5#
        • 2.Sxf5#
      • 1...f4
        • 2.Sb5#
        • 2.Sf5#
        • 2.Qe4#
      • 1...c4!
    • 1.Sh6?
      • threat
        • 2.Sxf5#
      • 1...f4
        • 2.Sf5#
      • 1...c4!
    • 1.Qxf5?
      • threat
        • 2.Qd3#
      • 1...c4
        • 2.Qe5#
      • 1...Kc4!
    • 1.Qe2?
      • threat
        • 2.Qd3#
      • 1...c4
        • 2.Qe5#
      • 1...Kd5!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Sg5#
      • 1...Kc4!
  • Keys
    • 1.Sg5!
      • 1...c4
        • 2.Qd6#
      • 1...g3
        • 2.Sf3#
      • 1...f4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • S(C);
      • Threat
        • S(C),XP(d)
      • Vars
        • P(d);::S(C)
      • Refutation
        • P(c);
    • Try
      • Q(B);XP(d)
      • Threat
        • QAR1(B)
      • Vars
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::S(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • P(c);SBLOCK::QAR2(B)
      • P(b);N_GUARD::S(C)
      • P(d);N_GUARD::QAR1(B)
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