MESON Chess Problem Database

Problem Display
PID: 200631 (7b/B4N2/5k2/4p2K/3PR3/7Q/B7/8 w - - 0 1)

Bylevski, Aleksandr

Problemas, 1993

7b/B4N2/5k2/4p2K/3PR3/7Q/B7/8

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bg7
      • 2.Qe6#
    • 1...exd4
      • 2.Bxd4#
  • Tries
    • 1.Bc5?
      • 1...exd4
        • 2.Bxd4#
      • 1...Bg7
        • 2.Qf1#
        • 2.Qe6#
        • 2.Qf3#
        • 2.dxe5#
      • 1...Kg7!
    • 1.Rxe5?
      • 1...Bg7
        • 2.Qf1#
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qf3#
        • 2.Qh4#
      • 1...Kg7!
    • 1.Qg2?
      • threat
        • 2.Qg5#
      • 1...Kf5
        • 2.Qf3#
        • 2.Qg6#
      • 1...Ke7!
    • 1.Qd7?
      • 1...exd4
        • 2.Bxd4#
      • 1...Bg7
        • 2.Qe6#
        • 2.dxe5#
      • 1...Kg7!
    • 1.Qg3?
      • threat
        • 2.Qxe5#
        • 2.Qg5#
      • 1...Kf5
        • 2.Qf3#
        • 2.Qg6#
      • 1...exd4
        • 2.Qe5#
        • 2.Qg5#
        • 2.Qg6#
      • 1...Ke7!
    • 1.Qh4+?
      • 1...Kf5
        • 2.Sd6#
        • 2.Sh6#
      • 1...Kg7!
  • Keys
    • 1.Qc8!
      • 1...Ke7
        • 2.Qd8#
      • 1...Kg7
        • 2.Qxh8#
      • 1...exd4
        • 2.Bxd4#
      • 1...Bg7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::QAR1(B)
    • P(a);OGATE,XP(C)::B(F),XP(a)
  • Tries
    • Try
      • B(F);
      • Vars
        • P(a);OGATE,XP(C)::B(F),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(a);OGATE,XP(C)::B(F),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAB1(B)
      • K(b);S_FLIGHT::QAB1(B),XB(c)
      • P(a);OGATE,XP(C)::B(F),XP(a)
      • B(c);SBLOCK::QAR1(B)
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