MESON Chess Problem Database

Problem Display
PID: 22061 (8/K1Rn1p2/1p1p3r/pP1k1BRp/q5n1/1PBr2N1/1N2P3/3Q2b1 w - - 0 1)

Mansfield, Comins

4th HM., Brisbane Courier, 1924

8/K1Rn1p2/1p1p3r/pP1k1BRp/q5n1/1PBr2N1/1N2P3/3Q2b1

#2

11 + 12

3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.Qxb3#
      • 2.e4#
    • 1...Qxb5
      • 2.e4#
    • 1...Qa1
      • 2.e4#
    • 1...Qa2
      • 2.e4#
    • 1...Qa3
      • 2.e4#
    • 1...Qc4
      • 2.bxc4#
    • 1...Re6
      • 2.Be4#
    • 1...Sgf6
      • 2.Bxd7#
    • 1...Sdf6
      • 2.Bxg4#
  • Tries
    • 1.Sxd3?
      • threat
        • 2.Sb4#
        • 2.Sf4#
      • 1...Qb4
        • 2.Sxb4#
        • 2.Sf4#
      • 1...Qf4
        • 2.Sb4#
        • 2.Sxf4#
      • 1...Bd4
        • 2.Qh1#
        • 2.e4#
      • 1...Qd4!
    • 1.Bxd3+?
      • 1...Sge5
        • 2.Bc4#
      • 1...Sde5
        • 2.Bc4#
      • 1...f5
        • 2.Bc4#
      • 1...Ke6!
    • 1.Qxd3+?
      • 1...Bd4
        • 2.Qe4#
      • 1...Qd4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.e4#
      • 1...Qxc4
        • 2.bxc4#
      • 1...Re6
        • 2.Be4#
      • 1...Be3
        • 2.Qh1#
      • 1...Sf2
        • 2.Se3#
      • 1...Se3
        • 2.Qxd3#
      • 1...Sgf6
        • 2.Bxd7#
      • 1...Sc5
        • 2.Sxb6#
      • 1...Sdf6
        • 2.Bxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,XP(G)::P(C)
    • Q(c);N_GUARD::P(C)
    • Q(c);OGATE::P(D),XQ(c)
    • R(j);SBLOCK::R(I)+B(H),DCHECK
    • S(d);N_GUARD,S_CUTP(l)::R(I)+B(H),XS(k)
    • S(k);N_GUARD,S_CUTP(l)::R(I)+B(H),XS(d)
  • Tries
    • Try
      • S(B);XR(b)
      • Threat
        • DUALS(2)
      • Refutation
        • Q(c);
    • Try
      • B(H);CHECK,XR(b)
      • Vars
        • S(d);P_SPINS(d)::QAR(A)+B(H),DCHECK
        • S(k);P_SPINS(k)::QAR(A)+B(H),DCHECK
        • P(l);P_SPINP(l)::QAR(A)+B(H),DCHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(A);CHECK,XR(b)
      • Vars
        • B(a);P_SPINB(a),S_CUTQ(c)::QAB1(A)
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • S(B);
    • Threat
      • P(C)
    • Vars
      • Q(c);OGATE,XS(B)::P(D),XQ(c)
      • R(j);SBLOCK::R(I)+B(H),DCHECK
      • B(a);OGATE::QAB(A)
      • S(d);N_GUARD,S_CUTB(a)::S(B)
      • S(d);S_CUTB(a)::QAR2(A),XR(b)
      • S(d);N_GUARD,S_CUTP(l)::R(I)+B(H),XS(k)
      • S(k);N_GUARD,S_CUTB(a)::S(B),XP(h)
      • S(k);N_GUARD,S_CUTP(l)::R(I)+B(H),XS(d)
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