MESON Chess Problem Database

Problem Display
PID: 171456 (1K3kr1/8/4Q1b1/4B3/8/8/B7/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakh-M (Borovich), 1998

1K3kr1/8/4Q1b1/4B3/8/8/B7/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qf7#
    • 1...Bc2
      • 2.Qf7#
    • 1...Bd3
      • 2.Qf7#
    • 1...Be4
      • 2.Qf7#
    • 1...Bf5
      • 2.Qf7#
    • 1...Bf7
      • 2.Qxf7#
    • 1...Bh7
      • 2.Qf7#
    • 1...Be8
      • 2.Qd6#
  • Tries
    • 1.Bf6?
      • threat
        • 2.Qxg8#
        • 2.Qe7#
      • 1...Rh8
        • 2.Qe7#
      • 1...Bf7
        • 2.Qxf7#
        • 2.Qe7#
      • 1...Bh7
        • 2.Qf7#
        • 2.Qc8#
        • 2.Qe7#
      • 1...Rg7!
    • 1.Qc8+?
      • 1...Be8
        • 2.Qc5#
      • 1...Ke7!
    • 1.Qf6+?
      • 1...Bf7
        • 2.Qxf7#
      • 1...Ke8!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Bd6#
      • 1...Rg7
        • 2.Bxg7#
      • 1...Bf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • B(a);N_GUARD::QAR1(C)
    • B(a);N_GUARD::QAR1(C),XB(a)
    • B(a);SBLOCK::QAB(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAB1(C)
      • Refutation
        • R(c);
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);P_SPINB(a),SBLOCK::QAB(C)
      • Refutation
        • K(b);P_PINQ(C),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(C),XB(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • B(B)
    • Vars
      • R(c);N_GUARD::B(B),XR(c)
      • B(a);N_GUARD::QAR1(C),XB(a)
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