MESON Chess Problem Database

Problem Display
PID: 133680 (n1b5/nR1P4/1pkNp3/7Q/N7/8/B7/K7 w - - 0 1)

Rendall, JL

The Field, 1961

(First published on Thu Nov 2 1961)

n1b5/nR1P4/1pkNp3/7Q/N7/8/B7/K7

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.dxc8Q+?
      • 1...Kxd6
        • 2.Rd7#
        • 2.Qxe6#
        • 2.Qd7#
      • 1...Sc7
        • 2.Rxb6#
        • 2.Qxc7#
      • 1...Sxc8!
    • 1.d8Q?
      • threat
        • 2.Qf3#
        • 2.Qh1#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Sc7
        • 2.Rxb6#
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...e5!
  • Keys
    • 1.Qe8!
      • threat
        • 2.dxc8S#
      • 1...Kxd6
        • 2.Qxe6#
      • 1...Bxb7
        • 2.d8Q#
      • 1...Bxd7
        • 2.Qxd7#
      • 1...Sc7
        • 2.Rxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(a);N_GUARD::QAR1(D)
  • Tries
    • Try
      • P(G);CHECK,XB(f)
      • Refutation
        • S(d);XQ(G)
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);N_GUARD::QAB1(G),XB(f)
      • Refutation
        • P(c);
  • Actual
    • Q(D);
    • Threat
      • PXB(f)=S
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(E)::QAR1(D),XP(c)
      • B(f);N_GUARD,XR(F)::P=Q
      • B(f);OGATE,P_SPINB(f),XP(G)::QAB1(D),XB(f)
      • S(e);N_GUARD,SBLOCK::R1(F),XP(a)
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