MESON Chess Problem Database

Problem Display
PID: 224615 (8/1R4B1/2Pn4/3k4/1P2R3/8/6NK/1Q6 w - - 0 1)

Robbins, Alexander Henry

Wilmington (Delaware) Sunday Morning Star, 1887

8/1R4B1/2Pn4/3k4/1P2R3/8/6NK/1Q6

#2

8 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rd4+?
      • 1...Ke6
        • 2.Sf4#
        • 2.Qg6#
      • 1...Kxc6!
    • 1.Re5+?
      • 1...Kc4
        • 2.Rc5#
      • 1...Kd4
        • 2.Rc5#
      • 1...Kxc6!
  • Keys
    • 1.Re6!
      • 1...Kc4
        • 2.Se3#
      • 1...Kxc6
        • 2.Qe4#
      • 1...Kxe6
        • 2.Sf4#
      • 1...Sxb7
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qb3#
      • 1...Sc4
        • 2.Sf4#
        • 2.Qe4#
      • 1...Se4
        • 2.Qa2#
        • 2.Qxe4#
        • 2.Qb3#
      • 1...Sb5
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qb3#
      • 1...Sf5
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qb3#
      • 1...Sf7
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qb3#
      • 1...Sc8
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qb3#
      • 1...Se8
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(F)
    • Try
      • R(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::R1(E)
        • K(a);OGATE,P-FLIGHT::B(H)+R(E)
      • Refutation
        • K(a);S_FLIGHT,XP(F)
  • Actual
    • R(E);
    • Vars
      • K(a);S_FLIGHT::S(B)
      • K(a);P_SPINS(b),S_FLIGHT,XP(F)::QAB(A)
      • K(a);S_FLIGHT,XR(E)::S(B)
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