MESON Chess Problem Database

Problem Display
PID: 256596 (2b5/1n1p3p/Q6r/pPN4r/2k1p1Np/2P4K/4P3/1RR3B1 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1933

2b5/1n1p3p/Q6r/pPN4r/2k1p1Np/2P4K/4P3/1RR3B1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.c4#
    • 1...Rxc5
      • 2.Se3#
    • 1...Rd5
      • 2.b6#
    • 1...Sxc5
      • 2.Se3#
    • 1...d5
      • 2.b6#
  • Tries
    • 1.Sxd7?
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Se3#
        • 2.c4#
      • 1...e3
        • 2.Sxe3#
      • 1...Bxd7!
    • 1.Bd4?
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Se3#
      • 1...e3
        • 2.Sxe3#
      • 1...d5
        • 2.b6#
      • 1...d6!
    • 1.Rb4+?
      • 1...Kd5
        • 2.Rd1#
        • 2.c4#
      • 1...axb4!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.c4#
      • 1...d6
        • 2.Sb6#
      • 1...e3
        • 2.Sxe3#
      • 1...d5
        • 2.b6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(a);OGATE,S_FLIGHT::P(E)
    • R(e);SBLOCK,XS(I)::S(G)
    • R(e);SBLOCK::QAB(J)+P(H)
    • S(g);SBLOCK,XS(I)::S(G)
    • P(h);P_PINS(G),SBLOCK::QAB(J)+P(H)
  • Tries
    • Try
      • S(I);XP(h)
      • Threat
        • S(G)
      • Vars
        • P(b);::S(G),XP(b)
      • Refutation
        • B(j);P_PINS(G),XS(I)
    • Try
      • B(C);
      • Threat
        • S(G)
      • Vars
        • K(a);S_FLIGHT::S(G)
        • P(b);::S(G),XP(b)
        • P(h);P_PINS(G),SBLOCK::QAB(J)+P(H)
      • Refutation
        • P(h);P_PINS(G)
    • Try
      • R(A);CHECK
      • Refutation
        • P(d);XR(A)
  • Actual
    • S(I);
    • Threat
      • S(G)
    • Vars
      • K(a);OGATE,S_FLIGHT::P(E)
      • P(h);P_PINS(G),S_CUTR(f)::S(I)
      • P(b);::S(G),XP(b)
      • P(h);P_PINS(G),SBLOCK,S_CUTR(e)::QAB(J)+P(H)
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