MESON Chess Problem Database

Problem Display
PID: 12005 (K7/7R/1PkB3r/P2R1P1B/2p2P2/NN2nq2/8/4r3 w - - 0 1)

Overkamp, Petrus

The Problemist, 1973

K7/7R/1PkB3r/P2R1P1B/2p2P2/NN2nq2/8/4r3

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Rc5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Rc5#
      • 1...Kxd5
        • 2.Bxf3#
      • 1...Qxd5
        • 2.Be8#
      • 1...Sxd5
        • 2.S3d4#
      • 1...Rxh7!
    • 1.Be5?
      • threat
        • 2.Rc5#
      • 1...Kxd5
        • 2.Bxf3#
      • 1...Qxd5
        • 2.Rc7#
      • 1...Rxh7
        • 2.Rd6#
      • 1...Sxd5
        • 2.Be8#
      • 1...cxb3!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Rc5#
      • 1...Kxd5
        • 2.Bxf3#
      • 1...Qxd5
        • 2.Rc7#
      • 1...Rxh7
        • 2.Rd6#
      • 1...Sxd5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK,XB(I)::R1(E)
  • Tries
    • Try
      • S(A);
      • Threat
        • R1(E)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(E)::B(G),XQ(c)
        • Q(c);SBLOCK,XR(E)::B(G)
        • S(b);SBLOCK,XR(E)::S(B)
      • Refutation
        • R(f);XR(J)
    • Try
      • B(I);
      • Threat
        • R1(E)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(E)::B(G),XQ(c)
        • Q(c);SBLOCK,XR(E)::R1(J)
        • R(f);N_GUARD,XR(J)::R1(E)
        • S(b);SBLOCK,XR(E)::B(G)
      • Refutation
        • P(d);XS(B)
  • Actual
    • B(I);
    • Threat
      • R1(E)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(E)::B(G),XQ(c)
      • Q(c);SBLOCK,XR(E)::R1(J)
      • R(f);N_GUARD,XR(J)::R1(E)
      • S(b);SBLOCK,XR(E)::S(B)
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