MESON Chess Problem Database

Problem Display
PID: 122994 (Qn6/b1p5/k1p5/Pn6/3p4/NNpB4/2K5/8 w - - 0 1)

Elekes, Dezso

Neukomm, Gyula (Julius) R

Sah, 1922

Qn6/b1p5/k1p5/Pn6/3p4/NNpB4/2K5/8

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd7
      • 2.Qc8#
    • 1...c5
      • 2.Bxb5#
  • Tries
    • 1.Kb1?
      • 1...Sd7
        • 2.Qc8#
      • 1...c5
        • 2.Bxb5#
      • 1...c2+!
    • 1.Kc1?
      • 1...Sd7
        • 2.Qc8#
      • 1...c5
        • 2.Bxb5#
      • 1...c2!
    • 1.Kd1?
      • 1...Sd7
        • 2.Qc8#
      • 1...c5
        • 2.Bxb5#
      • 1...c2+!
    • 1.Sb1?
      • 1...Sd7
        • 2.Qc8#
      • 1...c5!
    • 1.Sxb5?
      • threat
        • 2.Sa3#
        • 2.Sxc3#
        • 2.S5xd4#
        • 2.Sd6#
        • 2.Sxa7#
        • 2.Sxc7#
        • 2.Qxa7#
      • 1...c5
        • 2.Sxc7#
        • 2.Qxa7#
      • 1...cxb5!
    • 1.Bf1?
      • 1...Sd7
        • 2.Qc8#
      • 1...c5
        • 2.Bxb5#
      • 1...d3+!
    • 1.Be2?
      • 1...Sd7
        • 2.Qc8#
      • 1...c5
        • 2.Bxb5#
      • 1...d3+!
    • 1.Bc4?
      • 1...Sd7
        • 2.Qc8#
      • 1...c5
        • 2.Bxb5#
      • 1...d3+!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sc5#
      • 1...Sa3+
        • 2.Sxa3#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sd7
        • 2.Qc8#
      • 1...c5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE::QAB(F)
    • P(e);N_GUARD::B(D),XS(c)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(h);OGATE::QAB(F)
        • P(e);N_GUARD::B(D),XS(c)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(h);OGATE::QAB(F)
        • P(e);N_GUARD::B(D),XS(c)
      • Refutation
        • P(a);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(h);OGATE::QAB(F)
        • P(e);N_GUARD::B(D),XS(c)
      • Refutation
        • P(a);CHECK
    • Try
      • S(B);
      • Vars
        • S(h);OGATE::QAB(F)
      • Refutation
        • P(e);
    • Try
      • S(B);XS(c)
      • Threat
        • DUALS(7)
      • Refutation
        • P(e);P_SPINP(e),XS(B)
    • Try
      • B(D);
      • Vars
        • S(h);OGATE::QAB(F)
        • P(e);N_GUARD::B(D),XS(c)
      • Refutation
        • P(b);CHECK,N_SPINS(c)
    • Try
      • B(D);
      • Vars
        • S(h);OGATE::QAB(F)
        • P(e);N_GUARD::B(D),XS(c)
      • Refutation
        • P(b);CHECK,N_SPINS(c)
    • Try
      • B(D);
      • Vars
        • S(h);OGATE::QAB(F)
        • P(e);N_GUARD::B(D),XS(c)
      • Refutation
        • P(b);CHECK
  • Actual
    • S(B);N_PINS(c)
    • Threat
      • S(C)
    • Vars
      • S(c);CHECK::B(D)+S(B),XS(c)
      • S(c);::B(D)+S(B),XS(c)
      • S(h);OGATE::QAB(F)
      • P(e);::S(C),XP(e)
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