MESON Chess Problem Database

Problem Display
PID: 4676 (b1Q5/4R3/3p4/3k4/n7/b1np4/4N1K1/B7 w - - 0 1)

Otten, Henry

International Chess Magazine, 1886

b1Q5/4R3/3p4/3k4/n7/b1np4/4N1K1/B7

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sf4#
    • 1...Sd1
      • 2.Sf4#
    • 1...Sa2
      • 2.Sf4#
    • 1...Se4
      • 2.Sf4#
    • 1...Sb5
      • 2.Sf4#
  • Keys
    • 1.Re4!
      • threat
        • 2.Qc4#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Sxe4
        • 2.Sf4#
      • 1...Bc6
        • 2.Qf5#
      • 1...Bc5
        • 2.Qxa8#
      • 1...Sb2
        • 2.Sxc3#
      • 1...Sc5
        • 2.Sxc3#
      • 1...Sb6
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • S(b);::S(B)
  • Actual
    • R(D);
    • Threat
      • QAB1(E)
    • Vars
      • K(e);S_FLIGHT,XR(D)::QAR2(E)
      • S(b);SBLOCK,XR(D)::S(B)
      • B(g);SBLOCK::QAR2(E)
      • B(a);SBLOCK::QAB(E),XB(g)
      • S(d);N_GUARD::S(B),XS(b)
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