MESON Chess Problem Database

Problem Display
PID: 184254 (rnN5/5R2/n1k5/1R1p2K1/6B1/8/1Q6/5b2 w - - 0 1)

Knott, Hubert Edward

British Chess Magazine, 1916

rnN5/5R2/n1k5/1R1p2K1/6B1/8/1Q6/5b2

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Rb6#
    • 1...d4
      • 2.Bf3#
  • Tries
    • 1.Sa7+?
      • 1...Kd6
        • 2.Qf6#
        • 2.Qh2#
      • 1...Rxa7!
    • 1.Se7+?
      • 1...Kd6
        • 2.Qh2#
      • 1...Kc7!
    • 1.Ra5?
      • threat
        • 2.Qf6#
        • 2.Qb6#
        • 2.Qb7#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Ra7
        • 2.Qf6#
        • 2.Qb6#
      • 1...Sb4
        • 2.Qf6#
      • 1...Sc5
        • 2.Qb6#
      • 1...Sc7
        • 2.Qb6#
      • 1...d4
        • 2.Bf3#
        • 2.Qb6#
        • 2.Qb7#
      • 1...Sd7!
    • 1.Rc5+?
      • 1...Sxc5
        • 2.Qb6#
      • 1...Kxc5!
  • Keys
    • 1.Rfb7!
      • threat
        • 2.Qf6#
      • 1...Bxb5
        • 2.Qxb5#
      • 1...Sc5
        • 2.R5b6#
      • 1...Sc7
        • 2.R7b6#
      • 1...Sd7
        • 2.Bxd7#
      • 1...d4
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::R1(C)
    • P(b);OGATEB::B(B)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • R(e);XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(C);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);N_GUARD::QAB1(A),XB(a)
        • S(c);::QAR(A)
        • S(c);::QAR1(A)
      • Refutation
        • S(f);
    • Try
      • R(C);CHECK
      • Vars
        • S(c);XR(C)::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT,XR(C)
  • Actual
    • R(E);
    • Threat
      • QAR(A)
    • Vars
      • B(a);OGATE,XR(C)::QAB1(A),XB(a)
      • S(c);SBLOCK::R1(C)
      • S(c);SBLOCK::R1(E)
      • S(f);N_GUARD::B(B),XS(f)
      • P(b);OGATEB::B(B)
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