MESON Chess Problem Database

Problem Display
PID: 43078 (8/2K5/2R1P2Q/3kPR2/p2p4/P2q1P2/2P1P3/1B1N4 w - - 0 1)

Mansfield, Comins

2nd HM., Shakhmaty v SSSR, 1970

8/2K5/2R1P2Q/3kPR2/p2p4/P2q1P2/2P1P3/1B1N4

#2

12 + 4

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Ba2#
    • 1...Qxd1
      • 2.Ba2#
    • 1...Qd2
      • 2.Ba2#
  • Tries
    • 1.Ba2+?
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qb3!
    • 1.c4+?
      • 1...Qxc4
        • 2.Be4#
      • 1...dxc4 ep!
    • 1.e4+?
      • 1...Qxe4
        • 2.Ba2#
      • 1...dxe4 ep!
    • 1.e7?
      • threat
        • 2.Qd6#
        • 2.Qe6#
      • 1...Qxf5
        • 2.Qd6#
      • 1...Qxa3
        • 2.Qe6#
        • 2.e6#
      • 1...Qxf3!
  • Keys
    • 1.Qd2!
      • 1...Qxc2
        • 2.Se3#
      • 1...Qxe2
        • 2.Sc3#
      • 1...Qxf5
        • 2.Qa5#
      • 1...Qxd2
        • 2.Ba2#
      • 1...Qxa3
        • 2.c4#
        • 2.e4#
      • 1...Qxf3
        • 2.c4#
      • 1...Qc4
        • 2.Se3#
        • 2.e4#
      • 1...Qe4
        • 2.Sc3#
        • 2.Ba2#
        • 2.Qa5#
        • 2.c4#
      • 1...Qb5
        • 2.Sc3#
        • 2.Se3#
        • 2.e4#
      • 1...Qa6
        • 2.Sc3#
        • 2.Se3#
        • 2.e4#
      • 1...Qb3
        • 2.e4#
      • 1...Qc3
        • 2.Sxc3#
        • 2.e4#
      • 1...Qe3
        • 2.Sxe3#
        • 2.Qa5#
        • 2.c4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::B(A)
    • Q(a);N_GUARD,XS(B)::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_PINR(I),P_SPINQ(a)::B(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • P(C);CHECK
      • Vars
        • Q(a);OGATE,P_PINR(I),XP(C)::B(A)
      • Refutation
        • P(c);EP,XP(C)
    • Try
      • P(D);CHECK
      • Vars
        • Q(a);XP(D)::B(A)
      • Refutation
        • P(c);EP,XP(D)
    • Try
      • P(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XR(H)::QAR1(K)
      • Refutation
        • Q(a);XP(F)
  • Actual
    • Q(K);
    • Vars
      • Q(a);N_GUARD,P_PINR(I),P_SPINP(c),XP(C)::S(B)
      • Q(a);N_GUARD,P_SPINP(c),XP(D)::S(B)
      • Q(a);N_GUARD,P_SPINP(c),XR(H)::QAR(K)
      • Q(a);N_GUARD,XQ(K)::B(A)
      • Q(a);N_GUARD,P_SPINP(c),XP(F)::P(C)
      • Q(a);N_GUARD,P_SPINP(c)::P(D)
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