MESON Chess Problem Database

Problem Display
PID: 18431 (8/6p1/3p2p1/nK1k1P2/4Np1R/2BP3n/2B3N1/8 w - - 0 1)

Lawton, Howard

Time & Tide, 1955

8/6p1/3p2p1/nK1k1P2/4Np1R/2BP3n/2B3N1/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Sxf4#
    • 1...Sf2
      • 2.Sxf4#
    • 1...Sg5
      • 2.Sxf4#
    • 1...Sb3
      • 2.Bxb3#
    • 1...Sc4
      • 2.dxc4#
    • 1...Sc6
      • 2.Bb3#
    • 1...Sb7
      • 2.Bb3#
    • 1...f3
      • 2.Se3#
  • Tries
    • 1.Sg5?
      • 1...Sxg5
        • 2.Sxf4#
      • 1...Sg1
        • 2.Sxf4#
      • 1...Sf2
        • 2.Sxf4#
      • 1...Sb3
        • 2.Bxb3#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sc6
        • 2.Bb3#
      • 1...Sb7
        • 2.Bb3#
      • 1...f3
        • 2.Se3#
      • 1...gxf5!
    • 1.Bb3+?
      • 1...Sc4
        • 2.Bxc4#
      • 1...Sxb3!
    • 1.Rxh3?
      • threat
        • 2.Sxf4#
      • 1...f3
        • 2.Se3#
        • 2.Sf4#
      • 1...g5!
    • 1.Rxf4?
      • threat
        • 2.Se3#
      • 1...Sc4
        • 2.dxc4#
      • 1...gxf5!
  • Keys
    • 1.Rh6!
      • 1...gxf5
        • 2.Rxd6#
      • 1...gxh6
        • 2.Sf6#
      • 1...g5
        • 2.Rxd6#
      • 1...Sg1
        • 2.Sxf4#
      • 1...Sf2
        • 2.Sxf4#
      • 1...Sg5
        • 2.Sxf4#
      • 1...Sb3
        • 2.Bxb3#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sc6
        • 2.Bb3#
      • 1...Sb7
        • 2.Bb3#
      • 1...f3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(B),XP(b)
    • S(c);N_GUARD::B(A),XS(c)
    • S(c);OGATE::P(D),XS(c)
    • S(c);N_GUARD::B(A)
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • S(E);
      • Vars
        • S(a);N_GUARD,XS(E)::S(B),XP(b)
        • S(a);N_GUARD::S(B),XP(b)
        • S(c);N_GUARD::B(A),XS(c)
        • S(c);OGATE::P(D),XS(c)
        • S(c);N_GUARD::B(A)
        • P(b);N_GUARD::S(B)
      • Refutation
        • P(f);XP(H)
    • Try
      • B(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(A),XS(c)
      • Refutation
        • S(c);XB(A)
    • Try
      • R(F);XS(a)
      • Threat
        • S(B),XP(b)
      • Refutation
        • P(f);
    • Try
      • R(F);XP(b)
      • Threat
        • S(B)
      • Vars
        • S(c);OGATE::P(D),XS(c)
      • Refutation
        • P(f);XP(H)
  • Actual
    • R(F);
    • Vars
      • P(f);OGATE,XP(H)::R1(F),XP(e)
      • P(g);N_GUARD,XR(F)::S(E)
      • P(f);OGATE::R1(F),XP(e)
      • S(a);N_GUARD::S(B),XP(b)
      • S(c);N_GUARD::B(A),XS(c)
      • S(c);OGATE::P(D),XS(c)
      • S(c);N_GUARD::B(A)
      • P(b);N_GUARD::S(B)
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