MESON Chess Problem Database

Problem Display
PID: 51230 (b6q/b3R3/3BQ3/1p5r/3k4/8/2R1nN2/K4B2 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1924

b6q/b3R3/3BQ3/1p5r/3k4/8/2R1nN2/K4B2

#2

7 + 7

98 Manchester Guardian 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qe3#
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bd5
      • 2.Qe3#
    • 1...Sc3
      • 2.Rd2#
    • 1...b4
      • 2.Rc4#
      • 2.Qc4#
  • Tries
    • 1.Rd7?
      • threat
        • 2.Bc5#
      • 1...Rc5
        • 2.Bxc5#
      • 1...Rd5
        • 2.Qe4#
      • 1...Bc5
        • 2.Bxc5#
      • 1...Sc3
        • 2.Rd2#
      • 1...Bd5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Bc5#
      • 1...Kd5+
        • 2.Be5#
      • 1...Rc5
        • 2.Bxc5#
      • 1...Rd5
        • 2.Re4#
      • 1...Bc5
        • 2.Bxc5#
      • 1...Bd5
        • 2.Qxa7#
      • 1...Sc3
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(f);N_GUARD::QAR1(F),XB(f)
    • B(f);SBLOCK::QAB1(F)
    • S(a);SBLOCK::R(C)
  • Tries
    • Try
      • R(G);
      • Threat
        • R(G)+B(E),DCHECK
      • Vars
        • R(d);::R(G)+B(E),DCHECK,XR(d)
        • R(d);S_CUTB(f)::QAR1(F)
        • B(e);::R(G)+B(E),DCHECK,XB(e)
        • S(a);SBLOCK::R(C)
      • Refutation
        • B(f);
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+B(E),DCHECK
    • Vars
      • K(b);CHECK,P-FLIGHT::QAR(F)+B(E)
      • R(d);::QAR(F)+B(E),DCHECK,XR(d)
      • R(d);SBLOCK,S_CUTB(f)::R1(G)
      • B(e);::QAR(F)+B(E),DCHECK,XB(e)
      • B(f);SBLOCK,S_CUTR(d)::QAB(F),XB(e)
      • S(a);SBLOCK::R(C)
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