MESON Chess Problem Database

Problem Display
PID: 257926 (3bkNnR/1q2p1QK/2P2p1p/1B5r/4r3/8/b7/8 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

3bkNnR/1q2p1QK/2P2p1p/1B5r/4r3/8/b7/8

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Bxc6#
    • 1...Qd7
      • 2.cxd7#
    • 1...Rh1
      • 2.cxb7#
    • 1...Rh2
      • 2.cxb7#
    • 1...Rh3
      • 2.cxb7#
    • 1...Rh4
      • 2.cxb7#
    • 1...f5
      • 2.cxb7#
    • 1...e5
      • 2.cxb7#
  • Tries
    • 1.Se6?
      • threat
        • 2.Rxg8#
        • 2.Qf8#
        • 2.Qg6#
        • 2.Qxg8#
      • 1...Qxc6
        • 2.Bxc6#
      • 1...Rxe6
        • 2.Rxg8#
        • 2.Qxg8#
      • 1...Rg4
        • 2.Rxg8#
        • 2.Qf8#
      • 1...Rg5
        • 2.Rxg8#
        • 2.Qf8#
      • 1...Bxe6!
    • 1.Sd7?
      • threat
        • 2.Qf8#
      • 1...Qxd7
        • 2.cxd7#
      • 1...Qxc6!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qf8#
      • 1...Qxc6
        • 2.Bxc6#
      • 1...e5
        • 2.cxb7#
      • 1...e6
        • 2.Rxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(f);OGATE,P_SPINQ(f),XP(B)::B(A),XQ(f)
    • Q(f);OGATE::P(B),XQ(f)
    • R(c);N_GUARD::B(A)+P(B),XQ(f)
    • P(d);S_CUTR(c)::B(A)+P(B),XQ(f)
    • P(g);P_PINQ(C),S_CUTR(c)::B(A)+P(B),XQ(f)
  • Tries
    • Try
      • S(E);P_PINS(j)
      • Threat
        • DUALS(4)
      • Vars
        • Q(f);OGATE,P_SPINQ(f),XP(B)::B(A),XQ(f)
      • Refutation
        • B(a);XS(E)
    • Try
      • S(E);P_PINS(j)
      • Threat
        • QAR1(C)
      • Vars
        • Q(f);OGATE,XS(E)::P(B),XQ(f)
      • Refutation
        • Q(f);XP(B)
  • Actual
    • S(E);P_PINS(j)
    • Threat
      • QAR1(C)
    • Vars
      • Q(f);OGATE,P_SPINQ(f),XP(B)::B(A),XQ(f)
      • P(g);P_PINQ(C),S_CUTR(c)::B(A)+P(B),XQ(f)
      • P(g);P_PINQ(C),S_CUTB(a)::R(F),XS(j)
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