MESON Chess Problem Database

Problem Display
PID: 6916 (1b4B1/2n5/5N1K/rR1ppkP1/b4P2/7p/4PR1q/2Q5 w - - 0 1)

Mansfield, Comins

The Problemist, 1934

1b4B1/2n5/5N1K/rR1ppkP1/b4P2/7p/4PR1q/2Q5

#2

9 + 9

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb5
      • 2.Qc8#
    • 1...Sa6
      • 2.Qc8#
    • 1...Se6
      • 2.Bh7#
    • 1...Sa8
      • 2.Qc8#
    • 1...Se8
      • 2.Qc8#
  • Tries
    • 1.Qb1+?
      • 1...e4
        • 2.Qxe4#
      • 1...Bc2!
    • 1.Qc2+?
      • 1...e4
        • 2.Qxe4#
      • 1...Bxc2!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxe5#
      • 1...Qxf4
        • 2.Qxh3#
      • 1...Sxb5
        • 2.Qc8#
      • 1...exf4
        • 2.e4#
      • 1...Sa6
        • 2.Qc8#
      • 1...Se6
        • 2.Bh7#
      • 1...Sa8
        • 2.Qc8#
      • 1...Se8
        • 2.Qc8#
      • 1...d4
        • 2.Qd3#
      • 1...e4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE,XR(E)::QAB(A)
    • S(h);OGATE::QAB(A)
    • S(h);SBLOCK::B(I)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(f);P_SPINP(f),S_CUTP(e)::QAB1(A),XP(f)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(A);CHECK
      • Vars
        • P(f);P_SPINP(f),S_CUTP(e)::QAB1(A),XP(f)
      • Refutation
        • B(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(f)
    • Vars
      • Q(a);N_GUARD,P_PINP(F),P_SPINQ(a),XP(D)::QAB(A),XP(b)
      • S(h);OGATE,XR(E)::QAB(A)
      • P(f);P_SPINP(f),S_CUTP(e),XP(D)::P(B)
      • S(h);OGATE::QAB(A)
      • S(h);SBLOCK::B(I)
      • P(e);P_SPINP(f)::QAB(A)
      • P(f);P_SPINP(e)::QAR1(A)
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