MESON Chess Problem Database

Problem Display
PID: 253041 (8/b1nQ4/8/8/4pp2/3Pk3/4N1P1/1b2K3 w - - 0 1)

Poponin, Vladimir Grigorievich

The Problemist, 1991

8/b1nQ4/8/8/4pp2/3Pk3/4N1P1/1b2K3

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bb8
      • 2.Qd4#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qxe4#
      • 1...Bxd3
        • 2.Qxf4#
      • 1...exd3
        • 2.Qxf4#
        • 2.Qe5#
      • 1...Kxd3!
    • 1.Qc6?
      • threat
        • 2.Qxe4#
      • 1...Kxd3
        • 2.Qc3#
      • 1...Bxd3
        • 2.Qc1#
      • 1...exd3
        • 2.Qf3#
      • 1...Sd5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qxe4#
      • 1...Kxd3
        • 2.Qb3#
      • 1...Bxd3
        • 2.Qxa7#
      • 1...exd3
        • 2.Qxf4#
      • 1...Bd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(e);N_GUARD::QAB1(E),XB(e)
    • B(e);N_GUARD::QAB1(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(c)
      • Vars
        • B(a);SBLOCK,XP(D)::QAB1(E),XP(d)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c),XP(D)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(c)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(D)::QAR1(E)
        • B(a);SBLOCK,XP(D)::QAB(E)
        • P(c);OGATE,SBLOCK,XP(D)::QAR1(E)
      • Refutation
        • S(f);
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XP(c)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(D)::QAR2(E)
      • B(a);SBLOCK,XP(D)::QAB(E),XB(e)
      • P(c);OGATE,SBLOCK,XP(D)::QAB1(E),XP(d)
      • B(e);N_GUARD::QAB1(E),XB(e)
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