MESON Chess Problem Database

Problem Display
PID: 353 (1K6/1p1p4/pr1kNP2/3B1R2/qP3r2/B7/8/3R4 w - - 0 1)

Mansfield, Comins

The Observer, 1929

(First published on Sun Jun 23 1929)

1K6/1p1p4/pr1kNP2/3B1R2/qP3r2/B7/8/3R4

#2

8 + 7

3202 Complete Mansfield/I 1996
15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sf7#
      • 1...Qxb4
        • 2.Be4#
      • 1...Rfxb4
        • 2.Se4#
      • 1...Rbxb4!
    • 1.Bb3+?
      • 1...Kc6
        • 2.Sd8#
        • 2.Rc5#
      • 1...Rd4!
    • 1.Bc4+?
      • 1...Kc6
        • 2.Sd8#
        • 2.Rc5#
      • 1...Qxd1
        • 2.b5#
      • 1...Rd4!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Sf7#
      • 1...Qxb4
        • 2.Be4#
      • 1...Rfxb4
        • 2.Bb3#
      • 1...Rbxb4
        • 2.Sxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a),XP(C)::R(A)+B(D)
        • R(b);N_GUARD,P_SPINR(b),XP(C)::S(F)
      • Refutation
        • R(d);P_SPINR(d),XP(C)
    • Try
      • B(D);CHECK
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • B(D);CHECK
      • Vars
        • Q(a);XR(A)::B(B)+P(C)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(C)::R(A)+B(D)
      • R(b);N_GUARD,P_SPINR(b),XP(C)::R(A)+B(D)
      • R(d);N_GUARD,P_SPINR(d),XP(C)::S(F),XP(f)
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