MESON Chess Problem Database

Problem Display
PID: 9840 (3k3b/1K2N1Rp/8/1B1N2q1/7Q/8/3p4/8 w - - 0 1)

Mansfield, Comins

1st HM., Arbejder-Skak, 1960/II

3k3b/1K2N1Rp/8/1B1N2q1/7Q/8/3p4/8

#2

6 + 5

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Rg8#
    • 1...Qxh4
      • 2.Rg8#
    • 1...Qxe7+
      • 2.Qxe7#
    • 1...Qxd5+
      • 2.Sxd5#
    • 1...Qe5
      • 2.Rg8#
    • 1...Qf5
      • 2.Sxf5#
    • 1...Qg6
      • 2.Sxg6#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Rg8#
        • 2.Qxg5#
      • 1...Qe7+
        • 2.Qxe7#
      • 1...Qxh4
        • 2.Rg8#
      • 1...Qf6
        • 2.Rg8#
        • 2.Qxf6#
      • 1...h6
        • 2.Rg8#
      • 1...Bxg7!
    • 1.Sg6?
      • threat
        • 2.Rg8#
        • 2.Qxg5#
      • 1...Qe7+
        • 2.Qxe7#
      • 1...Qxh4
        • 2.Rg8#
      • 1...Qf6
        • 2.Rg8#
        • 2.Qxf6#
      • 1...h6
        • 2.Rg8#
      • 1...Bxg7!
    • 1.Sc8?
      • threat
        • 2.Rg8#
        • 2.Qxg5#
      • 1...Qe7+
        • 2.Qxe7#
      • 1...Qxh4
        • 2.Rg8#
      • 1...Qf6
        • 2.Rg8#
        • 2.Qxf6#
      • 1...h6
        • 2.Rg8#
      • 1...Bxg7!
    • 1.Qxg5?
      • threat
        • 2.Sf5#
        • 2.Sg6#
        • 2.Sc8#
        • 2.Sg8#
        • 2.Rg8#
      • 1...h6
        • 2.Rg8#
      • 1...Bxg7!
    • 1.Qc4?
      • threat
        • 2.Qc7#
        • 2.Qc8#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Qf4
        • 2.Qc8#
      • 1...Qg3
        • 2.Qc8#
      • 1...Qg4
        • 2.Qc7#
      • 1...Qe5
        • 2.Rg8#
        • 2.Qc8#
      • 1...Qf5
        • 2.Qc7#
      • 1...Qxe7+!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qb6#
      • 1...Qxe7+
        • 2.Sxe7#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Qe3
        • 2.Sxe3#
        • 2.Rg8#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Qh6
        • 2.Sf6#
      • 1...Qg1
        • 2.Se3#
      • 1...Qg3
        • 2.Sf4#
      • 1...Qe5
        • 2.Rg8#
      • 1...Qg6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD::R(F)
    • Q(b);N_GUARD,XQ(A)::R(F)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAB1(A),XQ(b)
    • Q(b);CHECK,XS(C)::QAB(A)+S(E),XQ(b)
    • Q(b);::QAB(A)+S(E),XQ(b)
  • Tries
    • Try
      • S(E);P_PINQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::QAB1(A),XQ(b)
        • Q(b);N_SPINQ(b),XQ(A)::R(F)
        • P(c);::R(F)
      • Refutation
        • B(e);XR(F)
    • Try
      • S(E);P_PINQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::QAB1(A),XQ(b)
        • Q(b);N_SPINQ(b),XQ(A)::R(F)
        • P(c);::R(F)
      • Refutation
        • B(e);XR(F)
    • Try
      • S(E);P_PINQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::QAB1(A),XQ(b)
        • Q(b);N_SPINQ(b),XQ(A)::R(F)
        • P(c);::R(F)
      • Refutation
        • B(e);XR(F)
    • Try
      • Q(A);XQ(b)
      • Threat
        • DUALS(5)
      • Vars
        • P(c);::R(F)
      • Refutation
        • B(e);XR(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE,XS(C)::QAR(A),XQ(b)
        • Q(b);::QAR1(A)
        • Q(b);::QAB1(A)
      • Refutation
        • Q(b);CHECK,XS(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • Q(b);CHECK,XS(E)::QAR(A)+S(C),XQ(b)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(C)::QAR(A),XQ(b)
      • Q(b);N_GUARD::QAR(A)+S(C),XQ(b)
      • Q(b);N_GUARD::QAR(A)+S(C)
      • Q(b);N_GUARD::R(F)
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