MESON Chess Problem Database

Problem Display
PID: 67487 (3B4/3p1b2/P3k3/8/3K4/8/8/1Q6 w - - 0 1)

Gilbert, J

Chess, 1948

3B4/3p1b2/P3k3/8/3K4/8/8/1Q6

#2

4 + 3

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qb6#
    • 1...Bg6
      • 2.Qxg6#
    • 1...Bg8
      • 2.Qg6#
  • Tries
    • 1.Qe1+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6!
    • 1.Qh1?
      • threat
        • 2.Qd5#
      • 1...Kf5
        • 2.Qe4#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qh3#
      • 1...Kd6!
    • 1.Qb3+?
      • 1...Kd6
        • 2.Qb6#
      • 1...d5
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Qb5?
      • threat
        • 2.Qd5#
        • 2.Qe5#
      • 1...Kd6
        • 2.Qb6#
      • 1...Bh5
        • 2.Qd5#
      • 1...Bg6
        • 2.Qd5#
      • 1...Be8
        • 2.Qd5#
      • 1...Bg8
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...d6!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qd5#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6
        • 2.Qb6#
      • 1...d6
        • 2.Qc8#
      • 1...d5
        • 2.Qxd5#

This anticipates 22752(1999)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
    • B(c);N_GUARD::QAR2(A),XB(c)
    • B(c);N_GUARD::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);::QAB1(A),XP(b)
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);P_SPINP(b)::QAB1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • B(c);::QAB1(A)
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);OGATEB,SBLOCK::QAB(A)
      • P(b);::QAB1(A),XP(b)
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