MESON Chess Problem Database

Problem Display
PID: 106892 (8/4B3/4B3/3Pkpp1/1PQ5/4bP2/4p2p/1K2R3 w - - 0 1)

Colonelli, Hercules

Boletim da UBP, 1992

8/4B3/4B3/3Pkpp1/1PQ5/4bP2/4p2p/1K2R3

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qc7#
    • 1...Bf4
      • 2.Qc3#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Bxf5?
      • threat
        • 2.Qe4#
      • 1...Kxf5
        • 2.Qe4#
      • 1...Bd4!
    • 1.Bf6+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxf6!
    • 1.Qc3+?
      • 1...Bd4
        • 2.Qc7#
      • 1...Kf4!
  • Keys
    • 1.Qxe2!
      • threat
        • 2.Qxe3#
      • 1...Kd4
        • 2.Bf6#
      • 1...Kf4
        • 2.Bd6#
      • 1...f4
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(c);P_SPINP(a),SBLOCK::QAB(E)
    • B(c);N_GUARD,P_SPINP(a),SBLOCK::QAB(E)
    • P(e);N_GUARD::QAR1(E)
  • Tries
    • Try
      • B(G);XP(e)
      • Threat
        • QAR1(E)
      • Vars
        • K(d);P-FLIGHT,XB(G)::QAB1(E)
      • Refutation
        • B(c);P_SPINP(a)
    • Try
      • B(H);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(E)
      • Refutation
        • K(d);S_FLIGHT,XB(H)
    • Try
      • Q(E);CHECK
      • Vars
        • B(c);P_SPINB(c),P_SPINP(a),SBLOCK::QAB(E)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(E);P_PINB(c),XP(a)
    • Threat
      • QAR2(E),XB(c)
    • Vars
      • K(d);N_SPINB(c),S_FLIGHT::B(H)
      • P(e);SBLOCK::QAB(E)
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