MESON Chess Problem Database

Problem Display
PID: 95169 (8/3p4/3N1N2/4Qp2/4p3/4k3/8/4K3 w - - 0 1)

Antonov, Yuri Mikhailovich

Cherkasskaya Pravda, 1986

8/3p4/3N1N2/4Qp2/4p3/4k3/8/4K3

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qc3#
      • 2.Qxe4#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qg3#
      • 1...Kd3
        • 2.Qc3#
      • 1...f4
        • 2.Qc3#
        • 2.Qxe4#
      • 1...Kf3!
    • 1.Sxf5+?
      • 1...Kf3
        • 2.Qg3#
        • 2.Qxe4#
      • 1...Kd3!
    • 1.Sd5+?
      • 1...Kd3
        • 2.Qc3#
      • 1...Kf3!
    • 1.Sh5?
      • threat
        • 2.Qc3#
      • 1...Kf3
        • 2.Qg3#
      • 1...Kd3!
    • 1.Qb2?
      • 1...Kd3
        • 2.Qd2#
      • 1...Kf3
        • 2.Qf2#
      • 1...f4
        • 2.Qc3#
      • 1...Kf4!
  • Keys
    • 1.Sfxe4!
      • 1...Kd3
        • 2.Qc3#
      • 1...Kf3
        • 2.Qg3#
      • 1...fxe4
        • 2.Qxe4#
      • 1...f4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(C);CHECK,XP(c)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(B);N_PINP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);XP(b)
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • P(c);OGATE,P_SPINP(c),XS(D)::QAR1(B),XP(c)
      • P(c);SBLOCK::QAR2(B)
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