MESON Chess Problem Database

Problem Display
PID: 133838 (b5n1/b2R2N1/Q5r1/2ppk1qN/5Rp1/3P1pP1/p4B2/K7 w - - 0 1)

Massingham, HW

The Field, 1962

(First published on Thu Mar 29 1962)

b5n1/b2R2N1/Q5r1/2ppk1qN/5Rp1/3P1pP1/p4B2/K7

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.gxf4#
    • 1...Qh4
      • 2.Rf5#
    • 1...Qh6
      • 2.Rf5#
    • 1...Qe7
      • 2.Rf5#
    • 1...Qd8
      • 2.Rf5#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rxg7
      • 2.Qd6#
    • 1...Sf6
      • 2.Re7#
      • 2.Qd6#
      • 2.Qe6#
  • Tries
    • 1.Re7+?
      • 1...Qxe7
        • 2.Rf5#
      • 1...Re6
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Sxe7!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qe1#
      • 1...Qxf4
        • 2.gxf4#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Sf6
        • 2.Qc7#
      • 1...c4
        • 2.Re4#
      • 1...d4
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(g);OGATE,XR(E)::P(D),XQ(g)
    • Q(g);N_GUARD::R1(E)
    • Q(g);N_GUARD::R1(E),XQ(g)
    • R(h);N_GUARD::QAB1(G),XR(h)
    • R(h);N_GUARD::QAR1(G),XR(h)
    • R(h);N_GUARD,XS(I)::QAB1(G)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • Q(g);XR(H)::R1(E)
      • Refutation
        • S(k);XR(H)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)
    • Vars
      • Q(g);OGATE,XR(E)::P(D),XQ(g)
      • Q(g);N_GUARD::R1(E),XQ(g)
      • S(k);S_CUTR(h)::QAB(G)
      • P(d);P_SPINP(e)::R1(E)
      • P(e);P_SPINP(d)::B(B),XP(e)
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