MESON Chess Problem Database

Problem Display
PID: 246656 (7K/8/8/1P1pk3/Q7/7B/5B2/8 w - - 0 1)

Makaronets, Leonid

Magadanskaya Pravda, 1998

7K/8/8/1P1pk3/Q7/7B/5B2/8

#2

5 + 2

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qxd4#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Bg3#
      • 1...d4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Bc5?
      • threat
        • 2.Qd4#
      • 1...d4
        • 2.Qxd4#
      • 1...Kf6!
    • 1.Qb4?
      • 1...d4
        • 2.Qxd4#
      • 1...Kf6!
    • 1.Qg4?
      • 1...Kf6
        • 2.Qg7#
      • 1...d4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Qh4?
      • threat
        • 2.Bg3#
      • 1...d4
        • 2.Qxd4#
      • 1...Kd6!
  • Keys
    • 1.Qa7!
      • 1...Ke4
        • 2.Qe3#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd6
        • 2.Bg3#
      • 1...Kf6
        • 2.Qg7#
      • 1...d4
        • 2.Qxd4#

Anticipated by 4987(1896)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);::QAB1(C),XP(a)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • B(A)
      • Vars
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);
      • Threat
        • QAB1(C)
      • Vars
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • B(A)
      • Vars
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • K(b);S_FLIGHT::QAB1(C)
      • K(b);S_FLIGHT::B(A)
      • P(a);::QAB1(C),XP(a)
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