MESON Chess Problem Database

Problem Display
PID: 133955 (2QK4/2p2p2/2N2N1n/1p3Pp1/RB1p1kp1/3q4/3PP1PP/6n1 w - - 0 1)

Massingham, HW

The Field, 1963

(First published on Thu Feb 21 1963)

2QK4/2p2p2/2N2N1n/1p3Pp1/RB1p1kp1/3q4/3PP1PP/6n1

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.g3#
    • 1...Qc2
      • 2.g3#
    • 1...Qc4
      • 2.g3#
    • 1...Qe4
      • 2.Sh5#
      • 2.g3#
    • 1...Qxf5
      • 2.g3#
    • 1...Qxd2
      • 2.Bxd2#
    • 1...Sf3
      • 2.g3#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Sd5#
        • 2.Sh5#
        • 2.Qe5#
      • 1...Qxe2
        • 2.Sd5#
        • 2.Sh5#
      • 1...Qxf5
        • 2.Sh5#
        • 2.g3#
      • 1...Qc4
        • 2.Sh5#
        • 2.Qe4#
        • 2.Qe5#
        • 2.g3#
      • 1...Qe4
        • 2.Sh5#
        • 2.Qxe4#
        • 2.g3#
      • 1...Qb3
        • 2.Sh5#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Qe3
        • 2.Sd5#
        • 2.Sh5#
      • 1...Qf3
        • 2.Sh5#
        • 2.Qe5#
      • 1...Qh3
        • 2.Sd5#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Sf3
        • 2.Sd5#
        • 2.Sh5#
        • 2.g3#
      • 1...g3
        • 2.Qe5#
      • 1...fxe6!
    • 1.e3+?
      • 1...dxe3+
        • 2.Bd6#
      • 1...Qxe3!
  • Keys
    • 1.e4!
      • threat
        • 2.Qxc7#
      • 1...dxe4 ep+
        • 2.Bd6#
      • 1...Qxe4
        • 2.Sh5#
      • 1...Qxd2
        • 2.Bxd2#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Sf3
        • 2.g3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::P(C)
    • Q(b);N_GUARD,XP(G)::P(C)
    • Q(b);OGATE,XP(A)::B(F),XQ(b)
    • S(a);S_CUTQ(b)::P(C)
  • Tries
    • Try
      • Q(J);
      • Threat
        • DUALS(3)
      • Vars
        • P(e);::QAB1(J)
      • Refutation
        • P(j);XQ(J)
    • Try
      • P(B);CHECK
      • Vars
        • P(c);CHECK,XP(B)::R(E)+B(F),DCHECK
      • Refutation
        • Q(b);XP(B)
  • Actual
    • P(B);
    • Threat
      • QAB(J),XP(i)
    • Vars
      • P(c);CHECK,EP,XP(B)::R(E)+B(F),DCHECK
      • Q(b);SBLOCK,XP(B)::S(I)
      • Q(b);OGATE,XP(A)::B(F),XQ(b)
      • S(h);OGATE,XP(G)::QAR1(J),XS(h)
      • S(a);SBLOCK,S_CUTQ(b)::P(C)
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