MESON Chess Problem Database

Problem Display
PID: 6798 (8/1B6/8/8/6p1/2pp1NK1/8/1q1R1N1k w - - 0 1)

Gibbins, Norman Martin

Social Chess Quarterly (The), 1933

8/1B6/8/8/6p1/2pp1NK1/8/1q1R1N1k

#2

5 + 5

133 The Problemist Supplement 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.S1d2#
      • 2.S1h2#
      • 2.Se3#
    • 1...Qb2
      • 2.S1d2#
      • 2.S1h2#
      • 2.Se3#
    • 1...Qb4
      • 2.S1d2#
      • 2.S1h2#
      • 2.Se3#
    • 1...Qb5
      • 2.S1d2#
      • 2.S1h2#
      • 2.Se3#
    • 1...Qb6
      • 2.Se3#
    • 1...Qxb7
      • 2.S1d2#
      • 2.S1h2#
      • 2.Se3#
  • Tries
    • 1.S3d2+?
      • 1...Qxb7
        • 2.Sh2#
        • 2.Se3#
      • 1...Kg1!
    • 1.S3h2+?
      • 1...Qxb7
        • 2.Sd2#
        • 2.Se3#
      • 1...Kg1!
    • 1.Sd4+?
      • 1...Qxb7
        • 2.Sd2#
        • 2.Sh2#
        • 2.Se3#
      • 1...Kg1!
    • 1.Sh4+?
      • 1...Qxb7
        • 2.Sd2#
        • 2.Sh2#
        • 2.Se3#
      • 1...Kg1!
    • 1.Se5+?
      • 1...Qxb7
        • 2.Sd2#
        • 2.Sh2#
        • 2.Se3#
      • 1...Kg1!
    • 1.Sg5+?
      • 1...Qxb7
        • 2.Sd2#
        • 2.Sh2#
        • 2.Se3#
      • 1...Kg1!
    • 1.Rxb1?
      • threat
        • 2.S1d2#
        • 2.S1h2#
        • 2.Se3#
      • 1...d2
        • 2.S1xd2#
      • 1...c2!
  • Keys
    • 1.Kf2!
      • threat
        • 2.Sg3#
      • 1...Qa2+
        • 2.S1d2#
      • 1...Qc2+
        • 2.S3d2#
      • 1...Qb2+
        • 2.S1d2#
      • 1...Qb6+
        • 2.Se3#
      • 1...g3+
        • 2.Sxg3#
      • 1...gxf3
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD::R(A)+S(B)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(A);XQ(a)
      • Threat
        • DUALS(3)
      • Vars
        • P(d);::R(A)+S(B),XP(d)
      • Refutation
        • P(c);
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • R(A)+S(B),DCHECK
    • Vars
      • Q(a);CHECK,N_GUARD,SBLOCK::R(A)+S(B)
      • Q(a);CHECK,N_GUARD::B(E)+S(C)
      • Q(a);CHECK,N_GUARD::R(A)+S(B)
      • P(e);CHECK::R(A)+S(B),DCHECK,XP(e)
      • P(e);OGATE,P_SPINP(e),XS(C)::B(E),XP(e)
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