MESON Chess Problem Database

Problem Display
PID: 257929 (Q1N2K2/1BkpP3/4b3/P1b5/n3N3/2R2p2/1q6/1rBr4 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

Q1N2K2/1BkpP3/4b3/P1b5/n3N3/2R2p2/1q6/1rBr4

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Rxc5#
  • Tries
    • 1.Sxc5?
      • threat
        • 2.Sa6#
        • 2.Sxe6#
      • 1...Qxc3
        • 2.Sa6#
      • 1...Sxc3
        • 2.Sa6#
      • 1...Sxc5
        • 2.Rxc5#
      • 1...Ba2
        • 2.Sa6#
        • 2.Se6#
      • 1...Bb3
        • 2.Sa6#
        • 2.Se6#
      • 1...Bh3
        • 2.Sa6#
        • 2.Se6#
      • 1...Bc4
        • 2.Sa6#
      • 1...Bg4
        • 2.Sa6#
        • 2.Se6#
      • 1...Bd5
        • 2.Sa6#
        • 2.Se6#
      • 1...Bf5
        • 2.Sa6#
        • 2.Se6#
      • 1...Bf7
        • 2.Sa6#
        • 2.Se6#
      • 1...Bg8
        • 2.Sa6#
        • 2.Se6#
      • 1...d5
        • 2.Bf4#
      • 1...d6!
    • 1.Scd6?
      • threat
        • 2.Se8#
        • 2.Qc8#
        • 2.Qd8#
        • 2.e8S#
      • 1...Rxd6
        • 2.Qc8#
        • 2.e8S#
      • 1...Bf7
        • 2.Qc8#
        • 2.Qd8#
      • 1...Sb6
        • 2.Se8#
        • 2.Rxc5#
        • 2.Qd8#
        • 2.e8S#
      • 1...Qxb7!
    • 1.Bf4+?
      • 1...Rd6
        • 2.Bxd6#
      • 1...d6!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qc8#
      • 1...Sxb6
        • 2.Rxc5#
      • 1...d5
        • 2.Bf4#
      • 1...d6
        • 2.e8S#

This is after

After FFL Alexander, BCM, 1934.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::R(B),XB(f)
  • Tries
    • Try
      • S(C);N_SPINP(F),XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XR(B)::S(C)
        • S(e);XR(B)::S(C)
        • S(e);OGATE,P_SPINS(e),XS(C)::R(B),XS(e)
        • B(g);::S(C)
        • P(i);N_GUARD,S_CUTR(b)::B(A)
      • Refutation
        • P(i);
    • Try
      • S(H);N_SPINP(F)
      • Threat
        • DUALS(4)
      • Refutation
        • Q(c);XB(E)
    • Try
      • B(A);CHECK
      • Vars
        • R(b);N_GUARD,N_PINP(F),P_SPINR(b)::B(A),XR(b)
      • Refutation
        • P(i);N_PINP(F),P_SPINP(i)
  • Actual
    • S(H);
    • Threat
      • QAR1(G)
    • Vars
      • S(e);N_GUARD,XS(H)::R(B),XB(f)
      • P(i);N_GUARD,S_CUTR(b)::B(A)
      • P(i);N_PINP(F)::P=S
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