MESON Chess Problem Database

Problem Display
PID: 193652 (8/5K2/3b4/N3R3/3k4/8/p3P3/q1B1Q3 w - - 0 1)

Dobbs, Gilbert S

1st HM., Pittsburgh Gazette-Times, 1915

8/5K2/3b4/N3R3/3k4/8/p3P3/q1B1Q3

#2

6 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Bxb2#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Be3#
        • 2.Qd2#
      • 1...Bxe5
        • 2.Qb4#
      • 1...Qb2
        • 2.Bxb2#
        • 2.Be3#
      • 1...Qc3
        • 2.Qh4#
      • 1...Qb1
        • 2.Be3#
      • 1...Bb4
        • 2.Be3#
        • 2.Qxb4#
      • 1...Qxc1!
    • 1.Rd5+?
      • 1...Ke4
        • 2.Qh1#
      • 1...Kxd5!
    • 1.Qh4+?
      • 1...Kc3
        • 2.Qc4#
      • 1...Kxe5!
    • 1.Qd1+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kxe5!
    • 1.e3+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Kxe5!
  • Keys
    • 1.e4!
      • threat
        • 2.Rd5#
      • 1...Kd3
        • 2.Qd2#
      • 1...Kxe5
        • 2.Sc6#
      • 1...Bxe5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD::B(A),XQ(a)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(d);N_GUARD,XR(E)::QAR2(B)
        • Q(a);SBLOCK::QAR(B)
        • Q(a);::B(A)
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(B)
      • Refutation
        • K(c);P-FLIGHT,XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • P(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
  • Actual
    • P(C);
    • Threat
      • R1(E)
    • Vars
      • K(c);P-FLIGHT::QAR1(B)
      • K(c);S_FLIGHT,XR(E)::S(D)
      • B(d);SBLOCK,XR(E)::QAB1(B)
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