MESON Chess Problem Database

Problem Display
PID: 58320 (3nK1B1/6N1/6p1/1N1pp3/4k3/3p3P/3B2Pp/2nb3Q w - - 0 1)

Thompson, Donald I

Chess Life, 1959

3nK1B1/6N1/6p1/1N1pp3/4k3/3p3P/3B2Pp/2nb3Q

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.g3#
      • 2.g4#
    • 1...Bb3
      • 2.g3#
      • 2.g4#
    • 1...Bf3
      • 2.gxf3#
    • 1...Ba4
      • 2.g3#
      • 2.g4#
    • 1...Bh5
      • 2.g4#
    • 1...Se2
      • 2.g3#
      • 2.g4#
    • 1...d4
      • 2.Sd6#
    • 1...g5
      • 2.Bh7#
  • Tries
    • 1.Qxd1?
      • threat
        • 2.Qf3#
        • 2.Qg4#
      • 1...Se6
        • 2.Qf3#
      • 1...Se2!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Sg3#
      • 1...Kf5
        • 2.Sd6#
      • 1...Bxh5
        • 2.g4#
      • 1...gxh5
        • 2.Bh7#
      • 1...Se2
        • 2.g4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(b);OGATE::P(C),XB(b)
    • B(b);N_GUARD::QAB(A)+P(C)
    • P(f);SBLOCK::S(E)
    • P(h);OGATEB::B(H)
  • Tries
    • Try
      • Q(A);XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);::QAB1(A)
      • Refutation
        • S(a);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(e);S_FLIGHT::S(E)
      • B(b);N_GUARD,XS(F)::QAB(A)+P(C)
      • P(h);OGATEB,XS(F)::B(H)
      • S(a);S_CUTB(b)::QAB(A)+P(C)
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Developed and maintained by Brian Stephenson.
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