MESON Chess Problem Database

Problem Display
PID: 4871 (8/8/1p6/1kPR4/8/K7/6BQ/8 w - - 0 1)

Maksimov, Nikolai Ivanovich

Shakhmatnoe obozrenie, 1892

8/8/1p6/1kPR4/8/K7/6BQ/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Bf1+?
      • 1...Ka5
        • 2.Qd2#
      • 1...Kc6!
    • 1.Qd6?
      • 1...Ka5
        • 2.Qxb6#
      • 1...Ka6
        • 2.Qxb6#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Kc4!
    • 1.Qb8?
      • 1...Ka5
        • 2.Qxb6#
      • 1...Ka6
        • 2.Qxb6#
      • 1...Kc6
        • 2.Qxb6#
      • 1...Kc4!
  • Keys
    • 1.Qc7!
      • 1...Kc4
        • 2.cxb6#
      • 1...Ka5
        • 2.Qxb6#
      • 1...Ka6
        • 2.Qxb6#
      • 1...bxc5
        • 2.Bf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(B),XP(b)
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
        • P(b);OGATE,P_SPINP(b),XP(D)::R1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(B),XP(b)
        • K(a);N_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAR(B)+P(D),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::QAB1(B),XP(b)
      • K(a);S_FLIGHT::QAR1(B),XP(b)
      • P(b);P_SPINP(b),XP(D)::B(A)
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