MESON Chess Problem Database

Problem Display
PID: 257895 (1N6/r2p2QK/p4r2/7R/N1Bk2n1/3P4/7n/4R2b w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

1N6/r2p2QK/p4r2/7R/N1Bk2n1/3P4/7n/4R2b

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Be4+
      • 2.Rxe4#
    • 1...Bd5
      • 2.Rxd5#
    • 1...Sf3
      • 2.Re4#
      • 2.Rd5#
    • 1...Sf2
      • 2.Qxf6#
    • 1...Se3
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qxf6#
    • 1...d5
      • 2.Sc6#
    • 1...d6
      • 2.Qxa7#
  • Tries
    • 1.Qxf6+?
      • 1...Se5
        • 2.Qxe5#
        • 2.Qf2#
        • 2.Qb6#
      • 1...Sxf6+!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Qxf6#
      • 1...Be4+
        • 2.Rxe4#
      • 1...Sf3
        • 2.Re4#
        • 2.Rxg4#
      • 1...d5
        • 2.Sc6#
      • 1...d6
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • B(a);CHECK,N_GUARD::R1(A),XB(a)
    • B(a);N_GUARD::R1(E),XB(a)
    • S(d);N_GUARD::QAB(F),XR(f)
    • P(h);N_GUARD,P_PINQ(F),S_CUTB(a)::S(H)
    • P(h);OGATE,P_PINQ(F)::QAB(F),XR(g)
  • Tries
    • Try
      • Q(F);CHECK,XR(f)
      • Refutation
        • S(d);CHECK,XQ(F)
  • Actual
    • R(E);P_PINS(d)
    • Threat
      • QAB(F),XR(f)
    • Vars
      • B(a);CHECK,N_GUARD,N_SPINS(d)::R1(A),XB(a)
      • P(h);N_GUARD,P_PINQ(F),S_CUTB(a)::S(H)
      • P(h);OGATE,P_PINQ(F)::QAB(F),XR(g)
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