MESON Chess Problem Database

Problem Display
PID: 10763 (7B/8/Q1n1N1p1/1R1P1k2/5np1/3P2Pp/1pBpNK2/1q1b1R2 w - - 0 1)

Mansfield, Comins

Tidskrift for Schack, 1967

7B/8/Q1n1N1p1/1R1P1k2/5np1/3P2Pp/1pBpNK2/1q1b1R2

#2

11 + 10

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd3+
      • 2.Ke3#
    • 1...Sb4
      • 2.S2d4#
    • 1...Sd4
      • 2.S2xd4#
    • 1...Sa5
      • 2.S2d4#
    • 1...Se5
      • 2.S2d4#
    • 1...Sa7
      • 2.S2d4#
    • 1...Se7
      • 2.S2d4#
    • 1...Sb8
      • 2.S2d4#
    • 1...Sd8
      • 2.S2d4#
  • Tries
    • 1.S6d4+?
      • 1...Sxd4
        • 2.Qf6#
      • 1...Kg5!
    • 1.Qa4?
      • threat
        • 2.Qe4#
        • 2.Qxf4#
      • 1...Sxd3+
        • 2.Kg1#
        • 2.Ke3#
      • 1...Sxe2
        • 2.Qe4#
      • 1...Sxd5
        • 2.Qe4#
      • 1...g5
        • 2.Qe4#
      • 1...Sg2
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe4#
      • 1...Sb4
        • 2.S2d4#
      • 1...Sd4
        • 2.S2xd4#
      • 1...Sxe6!
    • 1.dxc6+?
      • 1...Sd5
        • 2.S2d4#
      • 1...Kxe6!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qf8#
      • 1...Sxd3+
        • 2.Ke3#
      • 1...Sxd5
        • 2.Kg1#
      • 1...Sxe6
        • 2.dxc6#
      • 1...g5
        • 2.S6xf4#
      • 1...Sh5
        • 2.dxc6#
      • 1...Se5
        • 2.S2d4#
      • 1...Sd8
        • 2.S2d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(f);CHECK,P_SPINS(f),XP(E)::R(A)+K(D)
    • S(i);N_GUARD::S(C)
    • S(i);N_GUARD::S(C),XS(i)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • S(i);OGATE,XS(J)::QAR1(I)
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);XS(C)::QAB1(I)
        • S(f);P_SPINS(f),XP(H)::QAB1(I)
        • P(j);::QAB1(I)
        • S(f);::QAB1(I)
        • S(i);N_GUARD::S(C)
        • S(i);N_GUARD::S(C),XS(i)
      • Refutation
        • S(f);XS(J)
    • Try
      • P(H);CHECK,XS(i)
      • Vars
        • S(f);P_SPINS(f)::S(C)
      • Refutation
        • K(h);S_FLIGHT,XS(J)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • S(f);CHECK,P_SPINS(f),XP(E)::R(A)+K(D)
      • S(f);P_SPINS(f),XP(H)::R(A)+K(D)
      • S(f);N_GUARD,P_SPINS(f),XS(J)::R(G)+P(H),XS(i)
      • P(j);SBLOCK::QAB(I)+S(J),XS(f)
      • S(f);N_GUARD::R(G)+P(H),XS(i)
      • S(i);N_GUARD::S(C)
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