MESON Chess Problem Database

Problem Display
PID: 42203 (Bn5Q/1PNRp3/1nk3K1/2N1P3/P7/8/2R5/8 w - - 0 1)

Mansfield, Comins

The Problemist, 1968

Bn5Q/1PNRp3/1nk3K1/2N1P3/P7/8/2R5/8

#2

10 + 4

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Sc8
      • 2.bxc8S#
    • 1...Sa6
      • 2.b8S#
  • Tries
    • 1.Sb3+?
      • 1...Kxd7
        • 2.Qe8#
      • 1...Sc4!
    • 1.Sd3+?
      • 1...Kxd7
        • 2.Qe8#
      • 1...Sc4!
    • 1.Se4+?
      • 1...Kxd7
        • 2.Qe8#
        • 2.e6#
      • 1...Sc4!
    • 1.S5a6+?
      • 1...Kxd7
        • 2.Sxb8#
        • 2.Qe8#
      • 1...Sc4!
    • 1.S5e6+?
      • 1...Kxd7
        • 2.Qd8#
        • 2.Qe8#
      • 1...Sc4!
    • 1.Rd6+?
      • 1...Kxc7
        • 2.Sa6#
        • 2.Se6#
        • 2.Qd8#
      • 1...exd6!
    • 1.Qf6+?
      • 1...e6
        • 2.Qxe6#
      • 1...exf6!
  • Keys
    • 1.Qc8!
      • 1...Sxa4
        • 2.Sxa4#
      • 1...S6xd7
        • 2.Sxd7#
      • 1...Sxa8
        • 2.Sxa8#
      • 1...Sxc8
        • 2.bxc8S#
      • 1...S8xd7
        • 2.b8S#
      • 1...Sc4
        • 2.Sd5#
      • 1...Sd5
        • 2.Sxd5#
      • 1...Sa6
        • 2.b8S#
      • 1...e6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::PXS(a)=S
    • S(d);OGATE::P=S
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(H)::QAB1(J)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(H)::QAB1(J)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(C);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(C);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(C);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • R(H);CHECK
      • Refutation
        • P(c);XR(H)
    • Try
      • Q(J);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR2(J),XP(c)
      • Refutation
        • P(c);XQ(J)
  • Actual
    • Q(J);
    • Vars
      • S(a);XP(B)::R(A)+S(C),XS(a)
      • S(a);XR(H)::R(A)+S(C),XS(a)
      • S(a);XB(I)::QAR(J)+S(G),XS(a)
      • S(a);OGATE,XQ(J)::PXS(a)=S
      • S(d);OGATE,XR(H)::P=S
      • S(a);N_GUARD::QAR(J)+S(G)
      • S(a);N_GUARD::QAR(J)+S(G),XS(a)
      • S(d);OGATE::P=S
      • P(c);N_GUARD::R1(H)
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