MESON Chess Problem Database

Problem Display
PID: 148956 (8/8/rp2pp2/1Q2N1q1/p1PkP1n1/3P2p1/B2pRR1n/KN4Bb w - - 0 1)

White, Alain Campbell

British Chess Magazine, 1903

8/8/rp2pp2/1Q2N1q1/p1PkP1n1/3P2p1/B2pRR1n/KN4Bb

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.Rxe4#
    • 1...Sh6
      • 2.Rf4#
  • Tries
    • 1.Rf4+?
      • 1...Se3
        • 2.Bxe3#
      • 1...Sf2!
    • 1.Qd7+?
      • 1...Kxe5
        • 2.d4#
      • 1...Kc5!
    • 1.Qxb6+?
      • 1...Kxe5
        • 2.Qc5#
        • 2.d4#
      • 1...Rxb6!
  • Keys
    • 1.c5!
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Qb2#
      • 1...Qxe5
        • 2.Qc4#
      • 1...Bxe4
        • 2.Rxe4#
      • 1...Sxe5
        • 2.Rf4#
      • 1...bxc5
        • 2.Qb2#
      • 1...fxe5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE,XP(I)::R1(E),XB(a)
    • S(g);N_GUARD::B(C)+R(F)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::B(C),XS(g)
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(J);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT,XS(K)::P(G)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(J);CHECK,XP(j)
      • Refutation
        • R(i);XQ(J)
  • Actual
    • P(H);
    • Threat
      • S(K)
    • Vars
      • K(f);S_FLIGHT,XS(K)::QAB(J)
      • Q(h);SBLOCK,XS(K)::QAR1(J)
      • B(a);OGATE,XP(I)::R1(E),XB(a)
      • S(g);N_GUARD,SBLOCK,XS(K)::B(C)+R(F)
      • P(j);SBLOCK,XP(H)::QAB(J)
      • P(l);SBLOCK,XS(K)::QAR1(J)
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Developed and maintained by Brian Stephenson.
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