MESON Chess Problem Database

Problem Display
PID: 141345 (3n1B2/8/6Rp/3N3P/2pk1p2/2N1r3/K1PP4/6Q1 w - - 0 1)

Pierce, James

5. American Chess Congress, 1880

3n1B2/8/6Rp/3N3P/2pk1p2/2N1r3/K1PP4/6Q1

#2

9 + 6

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qxe3#
  • Tries
    • 1.Sxe3?
      • threat
        • 2.Sg4#
      • 1...Ke5
        • 2.Bg7#
      • 1...fxe3
        • 2.Qxe3#
      • 1...f3!
    • 1.Sb4?
      • 1...Sc6
        • 2.Sxc6#
      • 1...Se6
        • 2.Sc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sf7
        • 2.Sc6#
      • 1...f3
        • 2.Qxe3#
      • 1...Ke5!
    • 1.dxe3+?
      • 1...fxe3
        • 2.Qxe3#
      • 1...Ke5!
  • Keys
    • 1.Se7!
      • 1...Kc5
        • 2.Sf5#
      • 1...Ke5
        • 2.Bg7#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Se6
        • 2.Sc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sf7
        • 2.Sc6#
      • 1...f3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::QAB1(A),XR(a)
  • Tries
    • Try
      • S(F);XR(a)
      • Threat
        • QAB(A)+S(F)
      • Vars
        • K(c);S_FLIGHT::B(I)
        • P(d);OGATE,P_SPINP(d),XS(F)::QAB1(A),XP(d)
      • Refutation
        • P(d);
    • Try
      • S(F);
      • Vars
        • S(f);N_GUARD::S(F),XS(f)
        • S(f);N_GUARD::S(F)
        • P(d);N_GUARD::QAB1(A),XR(a)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT
    • Try
      • P(D);CHECK,XR(a)
      • Vars
        • P(d);OGATE,P_SPINP(d),XP(D)::QAB1(A),XP(d)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(F);
    • Vars
      • K(c);S_FLIGHT::B(I)+S(F)
      • K(c);N_SPINR(a),S_FLIGHT::B(I)
      • S(f);N_GUARD::S(F),XS(f)
      • S(f);N_GUARD::S(F)
      • P(d);N_GUARD::QAB1(A),XR(a)
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