MESON Chess Problem Database

Problem Display
PID: 103944 (n7/1Q3B1K/2R4b/3N4/1P3P2/3knR2/N1p1r3/4q3 w - - 0 1)

Janet, Frank

New York Sun, 1912

(First published on Tue Apr 16 1912)

n7/1Q3B1K/2R4b/3N4/1P3P2/3knR2/N1p1r3/4q3

#2

9 + 7

2642 Good Companions (February) 1917
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sdc3#
        • 2.Sxe3#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...Kd2
        • 2.Sxe3#
      • 1...Kc4
        • 2.Sxe3#
      • 1...Kd4
        • 2.Sxe3#
      • 1...Ke4
        • 2.Sxe3#
      • 1...Qxb4
        • 2.Sdxb4#
      • 1...Bxf4
        • 2.Sxf4#
      • 1...Rf2
        • 2.Sdc3#
      • 1...Rg2
        • 2.Sdc3#
      • 1...Rh2
        • 2.Sdc3#
      • 1...c1Q
        • 2.Sxe3#
      • 1...c1S
        • 2.Sxe3#
      • 1...c1B
        • 2.Sxe3#
      • 1...c1R
        • 2.Sxe3#
      • 1...Qc3
        • 2.Sdxc3#
      • 1...Qa1
        • 2.Sdc3#
      • 1...Rd2
        • 2.Sdc3#
      • 1...Bg7
        • 2.Sf6#
      • 1...Bf8
        • 2.Se7#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 20
    • REMOVED MATES = 0
  • Sets
  • Actual
    • R(F);
    • Threat
      • DUALS(6)
    • Vars
      • K(d);N_SPINS(e),P-FLIGHT::R(F)+S(E),XS(e)
      • K(d);N_SPINS(e),S_FLIGHT::B(H)+S(E),DCHECK,XS(e)
      • K(d);N_SPINS(e),S_FLIGHT::QAB(G)+S(E),XS(e)
      • Q(a);XP(C)::R(F)+S(E),DCHECK,XQ(a)
      • B(f);XP(D)::R(F)+S(E),DCHECK,XB(f)
      • R(c);::R(F)+S(E)
      • P(b);::R(F)+S(E),XS(e)
      • Q(a);::R(F)+S(E),XQ(a)
      • Q(a);::R(F)+S(E)
      • R(c);SBLOCK::R(F)+S(E)
      • B(f);::R(F)+S(E)
      • S(g);::R(F)+S(E),XS(g)
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