MESON Chess Problem Database

Problem Display
PID: 66370 (8/1Q3N2/3R3p/5k1r/3p1p1p/8/4P1P1/1K6 w - - 0 1)

Syzonenko, Viktor N

Schach-Echo, 1975

8/1Q3N2/3R3p/5k1r/3p1p1p/8/4P1P1/1K6

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qxf3#
  • Tries
    • 1.Sxh6+?
      • 1...Ke5
        • 2.Qd5#
        • 2.Qe7#
      • 1...Kg5
        • 2.Qd5#
        • 2.Qb5#
        • 2.Qe7#
        • 2.Qg7#
      • 1...Rxh6!
    • 1.Rf6+?
      • 1...Kg4
        • 2.Qf3#
      • 1...Kxf6!
    • 1.Qf3?
      • 1...d3
        • 2.e4#
      • 1...h3
        • 2.g4#
      • 1...Rg5!
    • 1.Qb5+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kg4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kg4
        • 2.Qh3#
      • 1...f3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAR2(E),XP(b)
  • Tries
    • Try
      • S(F);CHECK,XP(f)
      • Refutation
        • R(e);XS(F)
    • Try
      • R(D);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(E)
      • Refutation
        • K(d);P-FLIGHT,XR(D)
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • P(a);N_GUARD::P(B)
        • P(c);N_GUARD::P(C)
      • Refutation
        • R(e);
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(E)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • K(d);S_FLIGHT::QAB1(E)
      • P(b);OGATEB::QAR2(E),XP(b)
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