MESON Chess Problem Database

Problem Display
PID: 203611 (1Q1b4/1Pn1p3/4p3/3kPp2/5P2/4B3/3K4/5B2 w - - 0 1)

Borovski, A

64 Shakhmatnoe obozrenie, 1924

1Q1b4/1Pn1p3/4p3/3kPp2/5P2/4B3/3K4/5B2

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bg2#
    • 1...Sa8
      • 2.bxa8Q#
      • 2.bxa8B#
  • Tries
    • 1.Qxc7?
      • threat
        • 2.Bg2#
        • 2.Qc4#
      • 1...Ke4
        • 2.Bg2#
        • 2.Qc6#
      • 1...Bxc7!
    • 1.Qc8?
      • 1...Ke4
        • 2.Bg2#
      • 1...Sb5
        • 2.Bg2#
        • 2.Qc4#
      • 1...Sa6
        • 2.Bg2#
        • 2.Qc4#
      • 1...Sa8
        • 2.Bg2#
        • 2.Qc4#
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Se8
        • 2.Bg2#
        • 2.Qc4#
      • 1...Kc6!
    • 1.Qxd8+?
      • 1...Ke4
        • 2.Bg2#
      • 1...Kc6!
  • Keys
    • 1.Qa8!
      • 1...Ke4
        • 2.Bg2#
      • 1...Kc6
        • 2.b8S#
      • 1...Sxa8
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sb5
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#
      • 1...Sa6
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#
      • 1...Se8
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(A)
    • S(d);OGATE::PXS(d)=Q
  • Tries
    • Try
      • Q(G);XS(d)
      • Threat
        • DUALS(2)
      • Refutation
        • B(f);XQ(G)
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);P_SPINS(d),S_FLIGHT
    • Try
      • Q(G);CHECK,XB(f)
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(a);S_FLIGHT::B(A)
      • K(a);S_FLIGHT::P=S
      • S(d);OGATE,XQ(G)::PXS(d)=Q
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