MESON Chess Problem Database

Problem Display
PID: 21068 (7B/b2RK1nq/2pN2p1/Q1P1np1p/2Bk1Pr1/3p1P2/2b1rP2/8 w - - 0 1)

Guidelli, Giorgio

Westbury, Eric Ernest

1st Prize, Good Companions (May), 1916

7B/b2RK1nq/2pN2p1/Q1P1np1p/2Bk1Pr1/3p1P2/2b1rP2/8

#2

10 + 13

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924
3098 FIDE Album (1914-1944) (I) 1971
56 The Problemist 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc5
      • 2.Qa1#
  • Tries
    • 1.Se4+?
      • 1...Sxd7
        • 2.Qc3#
      • 1...Kxc4!
    • 1.Sb5+?
      • 1...Kxc5
        • 2.Sa3#
      • 1...Kxc4!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Sb5#
        • 2.Sxf5#
      • 1...Sxf3+
        • 2.Be6#
      • 1...Sxc4+
        • 2.Se4#
      • 1...Sxd7+
        • 2.Be6#
      • 1...Sf7+
        • 2.Be6#
      • 1...Se6+
        • 2.Sf7#
      • 1...Se8+
        • 2.Bf7#
      • 1...Rxf2
        • 2.Sxf5#
      • 1...Bxc5
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(k);P_PINS(G),SBLOCK,XP(F)::QAB(E)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • S(f);P_PINS(G),P_SPINS(l),XR(H)::QAB1(E)
      • Refutation
        • K(d);P-FLIGHT,XB(C)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);S_FLIGHT,XP(F)::QAR(E)+S(G)
      • Refutation
        • K(d);P-FLIGHT,XB(C)
  • Actual
    • Q(E);
    • Threat
      • DUALS(2)
    • Vars
      • S(f);CHECK,N_GUARD,P_SPINS(l),XP(B)::QAR(E)+B(C)
      • S(f);CHECK,N_GUARD,P_SPINS(f),XB(C)::R(H)+S(G)
      • S(f);CHECK,N_GUARD,P_SPINS(l),XR(H)::QAR(E)+B(C)
      • S(f);CHECK,N_GUARD,P_SPINS(l)::QAR(E)+B(C)
      • S(l);CHECK,P_SPINS(f)::R(H)+S(G)
      • S(l);CHECK,P_SPINS(f)::QAR(E)+B(C)
      • R(b);XP(A)::R(H)+S(G),DCHECK,XP(g)
      • B(k);P_PINS(G),SBLOCK,XP(F)::QAB(E)
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Developed and maintained by Brian Stephenson.
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