MESON Chess Problem Database

Problem Display
PID: 178211 (8/8/Q3p3/3Nk2N/8/7K/6B1/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Vratnica-64, 2005

8/8/Q3p3/3Nk2N/8/7K/6B1/8

#2

5 + 2

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...exd5
      • 2.Qf6#
  • Tries
    • 1.Kg4?
      • 1...exd5
        • 2.Qf6#
      • 1...Kd4!
    • 1.Qd3?
      • 1...exd5
        • 2.Qxd5#
      • 1...Kd6!
    • 1.Qc4?
      • threat
        • 2.Qf4#
      • 1...Kd6
        • 2.Qc7#
      • 1...exd5
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Qa1+?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kd6!
    • 1.Qb6?
      • 1...exd5
        • 2.Qf6#
      • 1...Kf5!
    • 1.Qc6?
      • 1...Kd4
        • 2.Qc3#
      • 1...exd5
        • 2.Qxd5#
        • 2.Qf6#
      • 1...Kf5!
  • Keys
    • 1.Qa5!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5
        • 2.Se7#
      • 1...Kd6
        • 2.Qc7#
      • 1...exd5
        • 2.Qxd5#

Anticipated by 135206(1914)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE,XS(C)::QAB1(E)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(b);OGATE,XS(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(b);OGATE,XS(C)::QAR1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);OGATE,XS(C)::QAR1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(b);OGATE,XS(C)::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT::QAR(E)+S(C),DCHECK
      • P(b);OGATE,P_SPINP(b),XS(C)::QAR1(E),XP(b)
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