MESON Chess Problem Database

Problem Display
PID: 146259 (n2r4/1nR1R3/3k3q/1p6/1K1N2r1/3bN3/1Q6/8 w - - 0 1)

Janet, Frank

Brisbane Courier, 1920

(First published on Sat Apr 10 1920)

n2r4/1nR1R3/3k3q/1p6/1K1N2r1/3bN3/1Q6/8

#2

6 + 8

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4+
      • 2.Qxd4#
    • 1...Rd7
      • 2.Rcxd7#
    • 1...Rb8
      • 2.Rcd7#
    • 1...Rc8
      • 2.Rcd7#
    • 1...Re8
      • 2.Rcd7#
    • 1...Rf8
      • 2.Rcd7#
    • 1...Rg8
      • 2.Rcd7#
    • 1...Rh8
      • 2.Rcd7#
    • 1...Bc4
      • 2.Sdf5#
    • 1...Be4
      • 2.Sxb5#
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qc6#
      • 1...Rxd4+
        • 2.Qxd4#
      • 1...Sxc7
        • 2.Qxc7#
      • 1...Qe6
        • 2.Rxe6#
      • 1...Rd7
        • 2.Rcxd7#
      • 1...Qh1
        • 2.Re6#
      • 1...Bc4
        • 2.Sdf5#
      • 1...Be4
        • 2.Sxb5#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(b);CHECK,OGATE,XS(D)::QAR2(A),XR(b)
    • R(h);N_GUARD::R1(E),XR(h)
    • R(h);N_GUARD::R1(E)
    • B(a);N_PINS(D)::S(D)
    • B(a);N_PINS(D)::S(D),XP(c)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(b);CHECK,OGATE,XS(D)::QAR2(A),XR(b)
      • S(g);OGATE,XR(E)::QAB1(A),XS(g)
      • Q(e);N_GUARD::R1(F),XQ(e)
      • R(h);N_GUARD::R1(E),XR(h)
      • Q(e);N_GUARD::R1(F)
      • B(a);N_PINS(D)::S(D)
      • B(a);N_PINS(D)::S(D),XP(c)
      • S(f);N_GUARD::QAB1(A)
      • S(f);N_GUARD::QAB1(A),XS(f)
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