MESON Chess Problem Database

Problem Display
PID: 18159 (8/6N1/r3p3/3R3B/pQ1BnkN1/2PR4/K6n/8 w - - 0 1)

Mansfield, Comins

Time & Tide, 1953

8/6N1/r3p3/3R3B/pQ1BnkN1/2PR4/K6n/8

#2

9 + 6

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Sxe6#
    • 1...Ra7
      • 2.Sxe6#
    • 1...Ra8
      • 2.Sxe6#
    • 1...Sf2
      • 2.Bxf2#
    • 1...Sxc3+
      • 2.Bxc3#
    • 1...Sc5
      • 2.Bxc5#
    • 1...Sg5
      • 2.Be5#
    • 1...Sf6
      • 2.Bxf6#
  • Tries
    • 1.Qb8+?
      • 1...Rd6
        • 2.Sxe6#
      • 1...e5
        • 2.Qxe5#
      • 1...Sd6!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sh3#
      • 1...Sxc3+
        • 2.Bxc3#
      • 1...Sxf2
        • 2.Bxf2#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Sd2
        • 2.Qf8#
      • 1...Sg3
        • 2.Be3#
      • 1...Sc5
        • 2.Bxc5#
      • 1...Sg5
        • 2.Be5#
      • 1...Sd6
        • 2.Sxe6#
      • 1...Sf6
        • 2.Bxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD::S(I),XP(f)
    • S(c);OGATEB::QAR(D)+B(E),XS(c)
    • S(c);CHECK,OGATE,XP(B)::QAR(D)+B(E),XS(c)
    • S(c);SBLOCK::QAR(D)+B(E),DCHECK
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • R(e);P_SPINR(e)::S(I),XP(f)
        • P(f);P_SPINP(f)::QAB1(D),XP(f)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(c);CHECK,OGATE,XP(B)::QAR(D)+B(E),XS(c)
      • S(c);OGATE,XS(F)::QAR(D)+B(E),XS(c)
      • S(a);N_GUARD::R1(C),XS(a)
      • S(c);N_GUARD::QAR(D)
      • S(c);SBLOCK::QAR(D)+B(E),DCHECK
      • S(c);OGATEB::QAR(D)+B(E),XS(c)
      • S(c);S_CUTR(e)::S(I),XP(f)
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