MESON Chess Problem Database

Problem Display
PID: 143939 (8/B1p1p3/B1Pbp3/2N1R3/3kp3/7N/8/K4Q2 w - - 0 1)

Dobbs, Gilbert S

Lasker's Chess Magazine, 1906

8/B1p1p3/B1Pbp3/2N1R3/3kp3/7N/8/K4Q2

#2

8 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qd3#
      • 2.Qf2#
  • Tries
    • 1.Sb3+?
      • 1...Kc3
        • 2.Qc4#
      • 1...Kxe5!
    • 1.Rxe4+?
      • 1...Kc3
        • 2.Qd3#
        • 2.Qc1#
      • 1...Kd5!
    • 1.Qc4+?
      • 1...Ke3
        • 2.Qd3#
        • 2.Qc3#
      • 1...Kxe5!
    • 1.Qc1?
      • 1...Bxc5
        • 2.Qxc5#
      • 1...Bxe5
        • 2.Qd2#
      • 1...e3
        • 2.Qb2#
        • 2.Qxe3#
      • 1...Kxe5!
    • 1.Qf2+?
      • 1...Kc3
        • 2.Qb2#
      • 1...e3
        • 2.Qxe3#
        • 2.Qb2#
      • 1...Kxe5!
  • Keys
    • 1.Qb5!
      • 1...Kc3
        • 2.Qb2#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxe5
        • 2.Sd7#
      • 1...Bxc5
        • 2.Qxc5#
      • 1...Bxe5
        • 2.Sa4#
      • 1...e3
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(E);CHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • Q(B);
      • Vars
        • B(c);OGATE,P_SPINB(c),XS(D)::QAB1(B),XB(c)
        • B(c);SBLOCK,XR(E)::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT,XR(E)::QAR(B)+S(D),DCHECK
      • B(c);OGATE,P_SPINB(c),XS(D)::QAB1(B),XB(c)
      • B(c);N_GUARD,XR(E)::B(H)+S(D)
      • P(b);::QAB(B)
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