MESON Chess Problem Database

Problem Display
PID: 121296 (b1N5/5p2/8/4kBp1/6P1/1QP3P1/K7/8 w - - 0 1)

Maximov, Nikolai J

Shakhmatny Zhurnal, 1896

b1N5/5p2/8/4kBp1/6P1/1QP3P1/K7/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd4#
        • 2.Qd6#
      • 1...Kf6
        • 2.Qd4#
      • 1...Bd5+!
    • 1.Qa4?
      • threat
        • 2.Qd4#
      • 1...Kd5
        • 2.Qb5#
      • 1...Kf6
        • 2.Qd4#
      • 1...Bd5+!
    • 1.Qc4?
      • threat
        • 2.Qd4#
      • 1...Kf6
        • 2.Qd4#
      • 1...Bd5!
    • 1.Qb4?
      • threat
        • 2.Qd6#
        • 2.Qd4#
      • 1...Kd5
        • 2.Qb5#
      • 1...Kf6
        • 2.Qd4#
      • 1...Bd5+!
    • 1.Qb6?
      • threat
        • 2.Qd4#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qb5#
      • 1...Bc6
        • 2.Qd4#
      • 1...Bd5+!
    • 1.Qb8+?
      • 1...Kd5
        • 2.Qb5#
      • 1...Kf6!
    • 1.c4?
      • threat
        • 2.Qb2#
        • 2.Qc3#
      • 1...Kf6
        • 2.Qb2#
        • 2.Qc3#
      • 1...Kd4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.c4#
      • 1...Kd5
        • 2.Qb5#
      • 1...Kf6
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • B(d);CHECK
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • B(d);CHECK
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • B(d);P_PINQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • K(a);S_FLIGHT::QAB(B)
      • Refutation
        • B(d);CHECK
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • B(d);::QAB1(B)
      • Refutation
        • B(d);CHECK
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+P(C)
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • K(a);S_FLIGHT::QAB(B)+P(C)
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