MESON Chess Problem Database

Problem Display
PID: 257891 (R2Bk1n1/1q2pp1R/2Pb3r/1B5r/2NQ3p/p7/K7/8 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

R2Bk1n1/1q2pp1R/2Pb3r/1B5r/2NQ3p/p7/K7/8

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Bxc7#
  • Tries
    • 1.Bc7+?
      • 1...Qc8
        • 2.Rxc8#
      • 1...Qb8
        • 2.Rxb8#
      • 1...Qxa8!
    • 1.cxb7+?
      • 1...Kf8
        • 2.Bc7#
        • 2.Qg7#
      • 1...Rxb5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qxf7#
        • 2.Qxg8#
      • 1...Qxc6
        • 2.Bxc6#
      • 1...Qxa8
        • 2.Qxg8#
      • 1...Rxh7
        • 2.Qxg8#
      • 1...Qc8
        • 2.Qxg8#
      • 1...Qb8
        • 2.Qxg8#
      • 1...Bb8
        • 2.Qxg8#
      • 1...Rf5
        • 2.Qxg8#
      • 1...Rg5
        • 2.Qxf7#
      • 1...Rf6
        • 2.Qxg8#
      • 1...Rg6
        • 2.Qxf7#
      • 1...Sf6
        • 2.Qxf7#
      • 1...e5
        • 2.cxb7#
      • 1...e6
        • 2.Sxd6#
      • 1...f5
        • 2.Qf7#
        • 2.Qxg8#
        • 2.cxb7#
      • 1...f6
        • 2.Qf7#
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD::R(G)+B(H),XQ(f)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::R(G),XQ(f)
      • Refutation
        • Q(f);XR(G)
    • Try
      • P(E);CHECK,XQ(f)
      • Refutation
        • R(c);XB(D)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • Q(f);OGATE,P_SPINQ(f),XP(E)::B(D),XQ(f)
      • Q(f);XR(G)::QAR2(C),XS(j)
      • R(e);XR(F)::QAR2(C),XS(j)
      • Q(f);::QAR2(C),XS(j)
      • B(d);::QAR2(C),XS(j)
      • R(c);::QAR2(C),XS(j)
      • R(c);::QAB1(C),XP(h)
      • R(e);::QAR2(C),XS(j)
      • R(e);::QAB1(C),XP(h)
      • S(j);::QAB1(C),XP(h)
      • P(g);S_CUTR(c)::B(D)+P(E),XQ(f)
      • P(g);N_GUARD,S_CUTR(e)::S(B),XB(d)
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