MESON Chess Problem Database

Problem Display
PID: 17861 (N6r/kP6/8/8/2Q5/2K3B1/8/8 w - - 0 1)

Wrobel, Marian

Norsk Vanforetidsskrift, 1951

N6r/kP6/8/8/2Q5/2K3B1/8/8

#2

5 + 2

4883 Still More Fun with Chess Miniatures 2002
133 The Problemist Supplement 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.b8Q#
    • 1...Rh2
      • 2.b8Q#
    • 1...Rh3
      • 2.b8Q#
    • 1...Rh4
      • 2.b8Q#
    • 1...Rh5
      • 2.b8Q#
    • 1...Rh6
      • 2.b8Q#
    • 1...Rh7
      • 2.b8Q#
  • Tries
    • 1.Bf2+?
      • 1...Kb8
        • 2.Qc7#
      • 1...Kxb7!
    • 1.Qd4+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxb7!
    • 1.Qc5+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxb7!
    • 1.Qc7?
      • threat
        • 2.Qb6#
      • 1...Ka6
        • 2.Qb6#
      • 1...Rxa8
        • 2.b8S#
      • 1...Rc8
        • 2.bxc8Q#
      • 1...Rh6!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qb6#
      • 1...Rxa8
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...Rh6
        • 2.b8Q#
        • 2.b8B#
      • 1...Rc8
        • 2.bxc8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::P=Q
    • R(b);N_GUARD,P_PINB(B)::P=Q
    • R(b);N_GUARD,SBLOCK::P=Q
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • R(b);SBLOCK,XS(E)::P=S
        • R(b);OGATE,P_PINQ(C)::PXR(b)=Q
      • Refutation
        • R(b);
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • R(b);OGATE,XS(E)::PXR(b)=Q
      • R(b);N_GUARD::P=Q
      • R(b);OGATE,P_PINQ(C)::PXR(b)=S
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