MESON Chess Problem Database

Problem Display
PID: 48881 (1K6/pPpN2p1/kbbRn3/3Qq3/1P4r1/2NR4/5p2/5B2 w - - 0 1)

White, Alain Campbell

5th Prize, Good Companions (May), 1918

1K6/pPpN2p1/kbbRn3/3Qq3/1P4r1/2NR4/5p2/5B2

#2

9 + 10

3391 Het Half Pin Thema 1924
2207 To Alain White 1945
459 Nebraska Chess Bulletin 1951

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Rd4#
    • 1...Bd4
      • 2.Re3#
    • 1...Ba5
      • 2.b5#
    • 1...Bc5
      • 2.Qa2#
    • 1...Bxb7
      • 2.Qxb7#
  • Tries
    • 1.Kc8?
      • threat
        • 2.Sb8#
        • 2.b8S#
      • 1...Bxb7+
        • 2.Qxb7#
      • 1...Be3
        • 2.Rd4#
        • 2.b8S#
      • 1...Bd4
        • 2.Re3#
        • 2.b8S#
      • 1...Ba5
        • 2.b5#
        • 2.b8S#
      • 1...Bc5
        • 2.Qa2#
        • 2.b8S#
      • 1...Bxd7+!
    • 1.Re3+?
      • 1...Bb5
        • 2.Bxb5#
        • 2.Qa2#
      • 1...Rc4!
    • 1.Rd4+?
      • 1...Bb5
        • 2.Bxb5#
        • 2.Qa2#
      • 1...Qe2!
  • Keys
    • 1.Ka8!
      • threat
        • 2.Sb8#
      • 1...Bxb7+
        • 2.Qxb7#
      • 1...Bxd7
        • 2.b8S#
      • 1...Be3
        • 2.Rd4#
      • 1...Bd4
        • 2.Re3#
      • 1...Ba5
        • 2.b5#
      • 1...Bc5
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(e);P_SPINB(f),S_CUTQ(c)::B(A)+R(C)
    • B(e);P_SPINB(f),S_CUTR(b)::B(A)+R(C)
    • B(e);P_SPINB(f),SBLOCK::P(D)
    • B(e);N_GUARD,P_SPINB(f),S_CUTQ(c)::QAR(E)
    • B(f);OGATE,P_SPINB(e),XP(G)::QAB1(E),XB(f)
  • Tries
    • Try
      • K(I);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(f);CHECK,OGATE,P_SPINB(e),XP(G)::QAB1(E),XB(f)
      • Refutation
        • B(f);CHECK,P_SPINB(e),XS(H)
    • Try
      • R(C);CHECK
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(C);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
  • Actual
    • K(I);P-FLIGHT,P_SPINP(G)
    • Threat
      • S(H)
    • Vars
      • B(f);CHECK,OGATE,P_SPINB(e),XP(G)::QAB1(E),XB(f)
      • B(f);N_PINP(G),P_SPINB(e),XS(H)::P=S
      • B(e);P_SPINB(f),S_CUTQ(c)::B(A)+R(C)
      • B(e);P_SPINB(f),S_CUTR(b)::B(A)+R(C)
      • B(e);P_SPINB(f),SBLOCK::P(D)
      • B(e);N_GUARD,P_SPINB(f),S_CUTQ(c)::QAR(E)
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