MESON Chess Problem Database

Problem Display
PID: 56086 (5bK1/qp6/8/p1p1pp2/7Q/RN1kP3/bR6/1NB5 w - - 0 1)

Mansfield, Comins

Mat, 1981

5bK1/qp6/8/p1p1pp2/7Q/RN1kP3/bR6/1NB5

#2

8 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb1
      • 2.Sa1#
      • 2.Sxa5#
      • 2.Sxc5#
    • 1...Bxb3+
      • 2.Raxb3#
    • 1...c4
      • 2.Sc5#
  • Tries
    • 1.Rbxa2?
      • threat
        • 2.Sa1#
        • 2.Sxa5#
        • 2.Sxc5#
      • 1...e4
        • 2.Sxa5#
      • 1...Qb6
        • 2.Sxc5#
      • 1...a4
        • 2.Sa1#
        • 2.Sa5#
        • 2.Sxc5#
      • 1...c4
        • 2.Sc5#
      • 1...f4!
    • 1.Qf4?
      • threat
        • 2.Rd2#
      • 1...Bxb3+
        • 2.Raxb3#
      • 1...Bxb1
        • 2.Sa1#
        • 2.Sxa5#
        • 2.Sxc5#
      • 1...e4
        • 2.Qf1#
      • 1...exf4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qd5#
      • 1...Kc4
        • 2.S3d2#
      • 1...Bxb1
        • 2.Sxa5#
      • 1...c4
        • 2.Sc5#
      • 1...e4
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);CHECK,OGATE,P_SPINB(a),XS(E)::R(D),XB(a)
    • P(d);N_PINS(E)::R(D)+S(E),DCHECK
  • Tries
    • Try
      • R(C);N_SPINS(E),XB(a)
      • Threat
        • DUALS(3)
      • Vars
        • P(e);::R(D)+S(E),XP(c)
        • Q(g);::R(D)+S(E),DCHECK,XP(d)
        • P(d);::R(D)+S(E),DCHECK
      • Refutation
        • P(f);
    • Try
      • Q(G);
      • Threat
        • R1(C)
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XS(E)::R(D),XB(a)
        • P(e);SBLOCK::QAB(G)
      • Refutation
        • P(e);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G)
    • Vars
      • K(b);N_PINS(E),S_FLIGHT::S(E)
      • B(a);N_PINS(E),XS(A)::R(D)+S(E),XP(c)
      • P(d);N_PINS(E),SBLOCK::R(D)+S(E),DCHECK
      • P(e);SBLOCK::QAB(G)
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