MESON Chess Problem Database

Problem Display
PID: 222385 (1Q2K3/8/8/3k4/8/4B3/4B3/8 w - - 0 1)

Wiehe, Christian

Nationaltidende, 1884

1Q2K3/8/8/3k4/8/4B3/4B3/8

#2

4 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Bf3#
  • Tries
    • 1.Ke7?
      • 1...Kc6
        • 2.Bf3#
      • 1...Ke4!
    • 1.Bd3?
      • 1...Kc6
        • 2.Be4#
      • 1...Ke6!
    • 1.Bc4+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kc6
        • 2.Qb6#
      • 1...Kxc4!
    • 1.Bd4?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Bf3#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Qf4?
      • 1...Ke6
        • 2.Bc4#
      • 1...Kc6!
    • 1.Qe5+?
      • 1...Kc6
        • 2.Bf3#
      • 1...Kxe5!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Kxd6!
    • 1.Qb6?
      • 1...Ke4
        • 2.Qe6#
      • 1...Ke5!
  • Keys
    • 1.Bf4!
      • 1...Kd4
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qe5#

Anticipated by 2392(0000), 120940(1877), 214368(1878), 9327(1880)

This anticipates 222932(1885), 158307(1906-1907), 184881(1908), 189438(1911), 189685(1912), 178322(1928), 96980(1943), 76834(1947), 103960(1993), 202752(2016)

FEATURES

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