MESON Chess Problem Database

Problem Display
PID: 133204 (1N1n1b2/1b4N1/3P4/r2k2p1/2R3P1/p1P5/B5KQ/8 w - - 0 1)

Massingham, HW

The Field, 1960

(First published on Thu Jul 7 1960)

1N1n1b2/1b4N1/3P4/r2k2p1/2R3P1/p1P5/B5KQ/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Rd4#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Rc6#
        • 2.Rc7#
        • 2.Rc8#
        • 2.Qd4#
      • 1...Bxg7
        • 2.Rc6#
        • 2.Rc7#
        • 2.Rc8#
      • 1...Ra4
        • 2.Qd4#
      • 1...Rb5
        • 2.Qd4#
      • 1...Rc5
        • 2.Rd4#
        • 2.Qd4#
      • 1...Ba6
        • 2.Qd4#
      • 1...Bc6
        • 2.Rxc6#
        • 2.Qd4#
      • 1...Bc8
        • 2.Rc6#
        • 2.Rc7#
        • 2.Rxc8#
        • 2.Qd4#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Se6
        • 2.Rc6#
        • 2.Rc7#
        • 2.Rc8#
      • 1...gxf4!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sc7#
      • 1...Ke6+
        • 2.Re4#
      • 1...Bxd6
        • 2.Qxd6#
      • 1...Rc5
        • 2.Rd4#
      • 1...Se6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::B(A)+R(E),DCHECK
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • R(b);::QAR1(C)
        • B(e);::QAR1(C)
        • S(f);::B(A)+R(E),XS(f)
      • Refutation
        • P(d);XQ(C)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(c);CHECK,S_FLIGHT::B(A)+R(E),DCHECK
      • B(g);OGATE,XP(G)::QAR1(C),XB(g)
      • R(b);SBLOCK::B(A)+R(E),DCHECK
      • S(f);SBLOCK::S(H)
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