MESON Chess Problem Database

Problem Display
PID: 148583 (8/8/3K4/6p1/1nppk1N1/4P3/1qR5/1B3Q1b w - - 0 1)

White, Alain Campbell

British Chess Magazine, 1901

8/8/3K4/6p1/1nppk1N1/4P3/1qR5/1B3Q1b

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...dxe3
      • 2.Rxc4#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qf5#
      • 1...dxe3
        • 2.Rxc4#
      • 1...Bf3!
    • 1.Rxc4+?
      • 1...Qxb1
        • 2.Rxd4#
      • 1...Qc2
        • 2.Rxd4#
      • 1...Sd3
        • 2.Bxd3#
      • 1...Sc2!
    • 1.Qxh1+?
      • 1...Kd3
        • 2.Qh7#
      • 1...Kf5!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Sf2#
        • 2.Se5#
      • 1...gxf4!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Sf2#
      • 1...Kd3
        • 2.Sf2#
      • 1...Kf5
        • 2.Rf2#
      • 1...dxe3
        • 2.Rxc4#
      • 1...Bf3
        • 2.Qh7#
      • 1...Sd3
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);XP(D)::B(A)+R(C),DCHECK,XP(d)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • QAB1(B)
      • Vars
        • P(e);XP(D)::B(A)+R(C),DCHECK,XP(d)
      • Refutation
        • B(a);
    • Try
      • R(C);CHECK,P_PINP(e),XP(d)
      • Vars
        • Q(b);XB(A)::R1(C),XP(e)
        • Q(b);P_SPINQ(b)::R1(C),XP(e)
        • S(c);N_GUARD,P_SPINS(c)::B(A),XS(c)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • K(f);S_FLIGHT::QAB(B)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • P(g);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • S(E)
    • Vars
      • K(f);S_FLIGHT::S(E)
      • K(f);S_FLIGHT::B(A)+R(C),DCHECK
      • P(e);XP(D)::B(A)+R(C),DCHECK,XP(d)
      • B(a);SBLOCK::QAB(B)
      • S(c);SBLOCK::S(E)
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