MESON Chess Problem Database

Problem Display
PID: 132948 (8/4P2N/3BrpB1/3Rpn2/4kN2/K2prnP1/8/1Q6 w - - 0 1)

Massingham, HW

The Field, 1959

(First published on Thu Sep 10 1959)

8/4P2N/3BrpB1/3Rpn2/4kN2/K2prnP1/8/1Q6

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxd3#
    • 1...Re2
      • 2.Qxd3#
    • 1...Rxe7
      • 2.Sxf6#
  • Tries
    • 1.Rd4+?
      • 1...Kxd4
        • 2.Qb4#
      • 1...exd4
        • 2.Qb7#
      • 1...Sxd4!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Rxd3#
      • 1...d2+
        • 2.Rd3#
      • 1...Rxd6
        • 2.Rxd6#
      • 1...Rxe7
        • 2.Sxf6#
      • 1...exf4
        • 2.Bxf5#
      • 1...Sd4
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::QAB1(A),XP(a)
    • R(g);N_GUARD,XP(H)::S(I),XP(h)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(d);N_SPINP(a),N_SPINS(f),P-FLIGHT,XR(E)::QAR2(A)
        • P(e);SBLOCK,XR(E)::QAB(A)
      • Refutation
        • S(c);XR(E)
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • QAB(A)+R(E),XP(a)
    • Vars
      • P(a);CHECK::QAB(A)+R(E)
      • R(g);OGATE,XB(F)::QAB(A)+R(E),XR(g)
      • R(g);N_GUARD,XP(H)::S(I),XP(h)
      • P(e);XS(D)::B(G),XS(f)
      • S(c);SBLOCK::QAB(A)+R(E),DCHECK,XP(e)
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