MESON Chess Problem Database

Problem Display
PID: 50990 (5K2/1pB2P2/1P1pk3/4N1P1/5p2/4PP1P/2B1P2Q/2R5 w - - 0 1)

Stallybrass, Don HR

The Spectator, 1956

5K2/1pB2P2/1P1pk3/4N1P1/5p2/4PP1P/2B1P2Q/2R5

#2

13 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sg4?
      • 1...Kd5
        • 2.Bb3#
      • 1...Kd7
        • 2.Bf5#
      • 1...fxe3
        • 2.Qxd6#
      • 1...d5!
    • 1.Sg6?
      • 1...Kd5
        • 2.Bb3#
      • 1...Kd7
        • 2.Bf5#
      • 1...fxe3
        • 2.Qxd6#
      • 1...d5!
    • 1.Bb3+?
      • 1...Kxe5
        • 2.Rc5#
        • 2.Qxf4#
      • 1...Kf5
        • 2.Qxf4#
      • 1...d5!
    • 1.Qxf4?
      • 1...Kd5
        • 2.Bb3#
      • 1...d5
        • 2.Bf5#
        • 2.Qg4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...dxe5!
  • Keys
    • 1.Sd7!
      • 1...Kd5
        • 2.Bb3#
      • 1...Kxd7
        • 2.Bf5#
      • 1...fxe3
        • 2.Qxd6#
      • 1...d5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(H);
      • Vars
        • K(c);S_FLIGHT::B(B)
        • P(a);OGATE,XP(E)::QAR1(D),XP(b)
      • Refutation
        • P(b);
    • Try
      • S(H);
      • Vars
        • K(c);S_FLIGHT::B(B)
        • P(a);OGATE,XP(E)::QAR1(D),XP(b)
      • Refutation
        • P(b);
    • Try
      • B(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(D),XP(a)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(D);XP(a)
      • Vars
        • K(c);S_FLIGHT::B(B)
      • Refutation
        • P(b);XS(H)
  • Actual
    • S(H);
    • Vars
      • K(c);S_FLIGHT::B(B)
      • K(c);S_FLIGHT,XS(H)::B(B)
      • P(a);OGATE,XP(E)::QAR1(D),XP(b)
      • P(b);N_GUARD,SBLOCK::S(H)
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