MESON Chess Problem Database

Problem Display
PID: 214368 (8/8/8/1K4BB/4k3/8/1Q6/8 w - - 0 1)

Hawkins, Xenophon

Detroit Free Press, 1878

8/8/8/1K4BB/4k3/8/1Q6/8

#2

4 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Bg6#
  • Tries
    • 1.Kc5?
      • 1...Kd3
        • 2.Bg6#
      • 1...Kf5!
    • 1.Bf4?
      • 1...Kd3
        • 2.Bg6#
      • 1...Kd5
        • 2.Qe5#
      • 1...Kf5
        • 2.Qe5#
      • 1...Kxf4!
    • 1.Bf3+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Kf5
        • 2.Qf6#
      • 1...Kxf3!
    • 1.Bg4?
      • 1...Kd3
        • 2.Bf5#
      • 1...Kd5!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qd5#
      • 1...Kxd4!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Bg6#
      • 1...Kxe5!
    • 1.Qf6?
      • 1...Kd5
        • 2.Bf3#
      • 1...Kd3!
    • 1.Qd2?
      • 1...Kf5
        • 2.Qd5#
      • 1...Ke5!
  • Keys
    • 1.Bf6!
      • 1...Kd3
        • 2.Qe2#
      • 1...Ke3
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Kf5
        • 2.Qe5#

Anticipated by 2392(0000), 120940(1877)

This anticipates 9327(1880), 222385(1884), 222932(1885), 184881(1908), 189438(1911), 189685(1912), 178322(1928), 76834(1947), 202752(2016)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(D)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • B(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XB(D)
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAR1(A)
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