MESON Chess Problem Database

Problem Display
PID: 245479 (4K3/8/P2B4/3k4/2N4Q/8/2P5/8 w - - 0 1)

Shumarin, Vladimir Pavlovich

Smena (Moscow), 2000

4K3/8/P2B4/3k4/2N4Q/8/2P5/8

#2

6 + 1

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Be7?
      • 1...Ke6
        • 2.Qe4#
      • 1...Kc6!
    • 1.Qf2?
      • 1...Kxc4
        • 2.Qc5#
      • 1...Kc6
        • 2.Qc5#
      • 1...Ke6
        • 2.Qf7#
      • 1...Ke4!
    • 1.Qg3?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kc6!
    • 1.Qh3?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qd4+?
      • 1...Kc6
        • 2.Qc5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Qf4?
      • 1...Ke6
        • 2.Qe5#
        • 2.Qf7#
      • 1...Kc6!
  • Keys
    • 1.Qh7!
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#

Anticipated by 2710(0000), 45874(1967), 79544(1970)

FEATURES

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