MESON Chess Problem Database

Problem Display
PID: 108006 (7B/8/8/1Q6/1p6/pk6/8/R3K3 w - - 0 1)

Dubina, A

Szachista, 1999-2002

7B/8/8/1Q6/1p6/pk6/8/R3K3

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Qc4#
  • Tries
    • 1.Ke2?
      • 1...Kc2
        • 2.Qd3#
        • 2.Qc4#
      • 1...a2!
    • 1.Bd4?
      • 1...Kc2
        • 2.Qc4#
      • 1...a2!
    • 1.Be5?
      • 1...Kc2
        • 2.Qc4#
      • 1...a2!
    • 1.Bf6?
      • 1...Kc2
        • 2.Qc4#
      • 1...a2!
    • 1.Bg7?
      • 1...Kc2
        • 2.Qc4#
      • 1...a2!
    • 1.Rb1+?
      • 1...Kc2
        • 2.Qf5#
      • 1...Ka2!
    • 1.Qe2?
      • 1...a2
        • 2.Qxa2#
      • 1...Ka4!
    • 1.Qxb4+?
      • 1...Kc2
        • 2.Qc3#
        • 2.Qb1#
        • 2.Qc4#
      • 1...Kxb4!
    • 1.Qd5+?
      • 1...Kc2
        • 2.Qc4#
        • 2.Qd1#
      • 1...Ka4!
  • Keys
    • 1.Qa6!
      • 1...Kc2
        • 2.Qc4#
      • 1...a2
        • 2.Qxa2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(c),S_FLIGHT::QAR2(C)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Refutation
        • P(a);
    • Try
      • B(D);
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • B(D);
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • B(D);
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • B(D);
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • R(A);CHECK
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAB(C)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • Q(C);N_PINP(c)
      • Vars
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(C);CHECK,XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • Q(C);N_PINP(c)
    • Vars
      • K(b);S_FLIGHT::QAR2(C)
      • P(a);OGATE::QAB1(C),XP(a)
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