MESON Chess Problem Database

Problem Display
PID: 56129 (3b4/7p/3pR3/RN1rqk1K/5N2/2nPP3/8/1B2Q3 w - - 0 1)

Mansfield, Comins

Echecs Francais, 1982

3b4/7p/3pR3/RN1rqk1K/5N2/2nPP3/8/1B2Q3

#2

9 + 7

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sxd4#
      • 2.Sxd6#
    • 1...Qf6
      • 2.Sxd6#
    • 1...Qg7
      • 2.Sxd6#
    • 1...Qh8
      • 2.Sxd6#
    • 1...Qe4
      • 2.Sxd6#
    • 1...Rxd3
      • 2.Sxd6#
    • 1...Rd4
      • 2.Sxd4#
  • Tries
    • 1.Sxd6+?
      • 1...Rxd6
        • 2.Raxe5#
      • 1...Qxd6!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qh3#
      • 1...Qxf4
        • 2.Sd4#
      • 1...Qxe3
        • 2.Sxd6#
      • 1...Qxe6
        • 2.Sg6#
      • 1...Rxd3
        • 2.Sxd6#
      • 1...Qg7
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,S_CUTR(b)::S(G),XP(e)
    • R(b);N_GUARD,P_SPINR(b),S_CUTQ(c),XP(C)::S(G),XP(e)
    • R(b);N_GUARD,S_CUTQ(c)::S(G),XR(b)
  • Tries
    • Try
      • S(G);CHECK,XP(e)
      • Vars
        • R(b);OGATE,P_SPINQ(c),XS(G)::R1(F),XQ(c)
      • Refutation
        • Q(c);P_SPINR(b),XS(G)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),S_CUTR(b),XS(E)::S(G)
      • Q(c);N_GUARD,S_CUTR(b),XP(D)::S(G),XP(e)
      • Q(c);N_GUARD,SBLOCK,XR(I)::QAR(B)+S(E)
      • R(b);N_GUARD,P_SPINR(b),S_CUTQ(c),XP(C)::S(G),XP(e)
      • Q(c);N_GUARD,S_CUTR(b)::S(G),XP(e)
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