MESON Chess Problem Database

Problem Display
PID: 81672 (2b1RK2/7B/1r3p2/3ppnpN/3Pk1N1/2P3p1/2P5/5R1n w - - 0 1)

Kovacevic, Marjan

Macleod, Norman Alasdair

2nd Prize, Bat Yam TT, 1983

2b1RK2/7B/1r3p2/3ppnpN/3Pk1N1/2P3p1/2P5/5R1n

#2

9 + 10

6455 The Chessboard Adventures of Norman Macleod 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Shxf6#
    • 1...Rb2
      • 2.Shxf6#
    • 1...Rb3
      • 2.Shxf6#
    • 1...Rb4
      • 2.Shxf6#
    • 1...Rb5
      • 2.Shxf6#
    • 1...Re6
      • 2.Bxf5#
    • 1...Rb7
      • 2.Shxf6#
    • 1...Rb8
      • 2.Shxf6#
    • 1...Ba6
      • 2.Bxf5#
    • 1...Be6
      • 2.Shxf6#
    • 1...Bb7
      • 2.Bxf5#
  • Tries
    • 1.Re6?
      • threat
        • 2.Shxf6#
        • 2.Bxf5#
      • 1...Rxe6
        • 2.Bxf5#
      • 1...Bxe6
        • 2.Shxf6#
      • 1...Sf2!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Re1#
      • 1...Ke3
        • 2.Sc4#
      • 1...fxe5
        • 2.Rxe5#
      • 1...Rb1
        • 2.Sd7#
      • 1...Ba6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(h);N_GUARD::S(F),XP(i)
    • R(h);N_SPINP(e),S_CUTB(j)::B(G),XS(f)
    • B(j);N_GUARD::B(G),XS(f)
    • B(j);N_SPINP(e),S_CUTR(h)::S(F),XP(i)
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);N_SPINP(e),XR(H)::B(G),XS(f)
        • B(j);N_SPINP(e),XR(H)::S(F),XP(i)
      • Refutation
        • S(a);
  • Actual
    • S(E);XP(e)
    • Threat
      • R(A)
    • Vars
      • K(c);N_SPINS(f),P-FLIGHT::R(H)+S(E),DCHECK
      • P(i);OGATE,P_SPINP(i),XS(E)::R1(H),XP(i)
      • R(h);N_GUARD::R(H)+S(E)
      • B(j);N_GUARD::R(H)+S(E)
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