MESON Chess Problem Database

Problem Display
PID: 156309 (8/Q2b4/2pk4/8/2P5/8/K7/3BR3 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2006

8/Q2b4/2pk4/8/2P5/8/K7/3BR3

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Qe7#
    • 1...Bg4
      • 2.Qe7#
    • 1...Bf5
      • 2.Qe7#
    • 1...Bc8
      • 2.Qe7#
    • 1...Be8
      • 2.Qe7#
  • Tries
    • 1.Bf3?
      • threat
        • 2.c5#
      • 1...c5
        • 2.Qb8#
      • 1...Be6!
    • 1.Ba4?
      • 1...Bh3
        • 2.Qe7#
      • 1...Bg4
        • 2.Qe7#
      • 1...Bf5
        • 2.Qe7#
      • 1...Bc8
        • 2.Qe7#
      • 1...Be8
        • 2.Qe7#
      • 1...c5
        • 2.Qb8#
        • 2.Qxd7#
      • 1...Be6!
  • Keys
    • 1.Bg4!
      • 1...Bxg4
        • 2.Qe7#
      • 1...c5
        • 2.Qxd7#
      • 1...Be6
        • 2.Rxe6#
      • 1...Bf5
        • 2.Qe7#
      • 1...Bc8
        • 2.Qe7#
      • 1...Be8
        • 2.Re6#
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(c);OGATE::QAB1(E)
  • Tries
    • Try
      • B(A);
      • Threat
        • P(D)
      • Vars
        • P(a);SBLOCK::QAB(E)
      • Refutation
        • B(c);P_PINP(D)
    • Try
      • B(A);
      • Vars
        • B(c);OGATE::QAB1(E)
      • Refutation
        • B(c);P_PINP(D)
  • Actual
    • B(A);
    • Vars
      • B(c);OGATE,XB(A)::QAB1(E)
      • P(a);SBLOCK::QAR1(E),XB(c)
      • B(c);N_GUARD,P_PINP(D)::R1(B),XB(c)
      • B(c);OGATE::QAB1(E)
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