MESON Chess Problem Database

Problem Display
PID: 197006 (4K3/4p3/1B1k4/5Q2/8/8/8/8 w - - 0 1)

Carpenter, George Edward

American Chess Bulletin, 1919

4K3/4p3/1B1k4/5Q2/8/8/8/8

#2

3 + 2

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qd7#
    • 1...e6
      • 2.Qc5#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qe6#
      • 1...e6
        • 2.Qxe6#
      • 1...Kc6!
    • 1.Kd8?
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#
      • 1...Kc6!
    • 1.Bg1?
      • 1...Kc6
        • 2.Qd7#
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#
      • 1...Kc7!
    • 1.Bf2?
      • 1...Kc6
        • 2.Qd7#
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#
      • 1...Kc7!
    • 1.Be3?
      • 1...Kc6
        • 2.Qd7#
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#
      • 1...Kc7!
    • 1.Bd4?
      • threat
        • 2.Qd7#
      • 1...Kc6
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#
      • 1...Kc7!
    • 1.Qb5?
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#
      • 1...Ke6!
  • Keys
    • 1.Ba7!
      • 1...Kc6
        • 2.Qd7#
      • 1...Kc7
        • 2.Qd7#
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#

Anticipated by 196690(1919)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR1(A)
    • P(b);SBLOCK::QAB1(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • P(b);::QAR1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAR1(A)
      • P(b);SBLOCK::QAR1(A)
      • P(b);SBLOCK::QAB1(A)
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