MESON Chess Problem Database

Problem Display
PID: 194393 (1N6/8/1B6/1B2KQ2/1k6/1p6/8/8 w - - 0 1)

van Wageningen, R

Probleemblad, 1979

1N6/8/1B6/1B2KQ2/1k6/1p6/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qc5#
      • 1...Ka3
        • 2.Bc5#
      • 1...Kxb5
        • 2.Qxb3#
      • 1...b2
        • 2.Qxb2#
      • 1...bxc2!
    • 1.Qd3?
      • 1...b2
        • 2.Sa6#
        • 2.Sc6#
      • 1...Ka3!
    • 1.Qf2?
      • threat
        • 2.Qc5#
      • 1...Ka3
        • 2.Bc5#
      • 1...Kc3
        • 2.Ba5#
      • 1...b2
        • 2.Qxb2#
      • 1...Kxb5!
  • Keys
    • 1.Qb1!
      • 1...Ka3
        • 2.Bc5#
      • 1...Kc3
        • 2.Ba5#
      • 1...Kxb5
        • 2.Qxb3#
      • 1...b2
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);S_FLIGHT::B(D)
        • K(b);P-FLIGHT,XB(A)::QAR2(C),XP(a)
        • P(a);OGATEB::QAR2(C),XP(a)
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);S_FLIGHT::B(D)
        • P(a);OGATEB::QAR2(C),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XB(A)
  • Actual
    • Q(C);P_PINP(a)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::B(D)
      • K(b);P-FLIGHT,XB(A)::QAR2(C),XP(a)
      • P(a);OGATEB::QAR2(C),XP(a)
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