MESON Chess Problem Database

Problem Display
PID: 110662 (b1B5/1n1K4/Nk6/1N6/QP6/8/8/8 w - - 0 1)

Kovacs, Ferenc

HM., Francia Feladv. Tars., 1947

b1B5/1n1K4/Nk6/1N6/QP6/8/8/8

#2

6 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qxa5#
      • 2.bxa5#
    • 1...Sc5+
      • 2.bxc5#
    • 1...Sd6
      • 2.Qa5#
    • 1...Sd8
      • 2.Qa5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qa6#
      • 1...Sa5
        • 2.Qxa5#
      • 1...Sxc5+!
    • 1.Sac7?
      • threat
        • 2.Sd5#
        • 2.Sxa8#
        • 2.Qa6#
        • 2.Qa7#
      • 1...Sa5
        • 2.Sxa8#
        • 2.Qxa5#
      • 1...Sd6
        • 2.Sxa8#
        • 2.Qa5#
        • 2.Qa6#
        • 2.Qa7#
      • 1...Sd8
        • 2.Sxa8#
        • 2.Qa5#
        • 2.Qa6#
        • 2.Qa7#
      • 1...Sc5+!
    • 1.Sb8?
      • threat
        • 2.Qa6#
      • 1...Sa5
        • 2.Qxa5#
      • 1...Sc5+!
    • 1.Bxb7?
      • 1...Bxb7
        • 2.Qa5#
      • 1...Kxb7!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qc6#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Kxb5
        • 2.Qc6#
      • 1...Kxa6
        • 2.Qc6#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);CHECK,OGATE::P(B),XS(b)
    • S(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • S(b);CHECK,XS(D)
    • Try
      • S(D);
      • Threat
        • DUALS(4)
      • Refutation
        • S(b);CHECK
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • S(b);CHECK
    • Try
      • B(F);XS(b)
      • Vars
        • B(c);SBLOCK,XB(F)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(F)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(b);CHECK,N_GUARD::QAB1(A),XS(b)
      • K(a);P-FLIGHT,XS(C)::QAB1(A)
      • K(a);P-FLIGHT,P_SPINS(b),XS(D)::QAR2(A)
      • S(b);N_GUARD::QAB1(A)
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