MESON Chess Problem Database

Problem Display
PID: 162851 (8/1k6/R7/2K5/5Q2/8/8/8 w - - 0 1)

Caplin, Aleksandr Borisovich

Sachmatija, 2003

8/1k6/R7/2K5/5Q2/8/8/8

#2

3 + 1

5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Rb6+?
      • 1...Ka7
        • 2.Qb8#
        • 2.Qa4#
      • 1...Ka8
        • 2.Qb8#
        • 2.Qa4#
      • 1...Kc8!
    • 1.Ra7+?
      • 1...Kc8
        • 2.Qc7#
        • 2.Qf8#
      • 1...Kxa7!
    • 1.Qc7+?
      • 1...Kxa6
        • 2.Qb6#
      • 1...Kxc7!
    • 1.Qb8+?
      • 1...Kxa6
        • 2.Qb6#
        • 2.Qa8#
      • 1...Kxb8!
  • Keys
    • 1.Qf8!
      • 1...Kxa6
        • 2.Qa8#
      • 1...Kc7
        • 2.Ra7#

Anticipated by 4572(1880), 121069(1884), 56205(1903), 198642(1921)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(C)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XR(C)::QAR2(A)
      • K(a);P-FLIGHT::R(C)
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