MESON Chess Problem Database

Problem Display
PID: 150374 (K7/8/2nN4/1N1pkBP1/1p3p2/8/4P3/2Q5 w - - 0 1)

Agostini, Valerio

Mariani, Stefano

Vratnica-64, 2010

K7/8/2nN4/1N1pkBP1/1p3p2/8/4P3/2Q5

#2

7 + 5

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qe3#
    • 1...d4
      • 2.Qc5#
  • Tries
    • 1.Qb2+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...d4!
    • 1.Qa1+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...d4!
    • 1.Qc3+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...d4
        • 2.Qc5#
      • 1...bxc3!
    • 1.Qc5?
      • 1...f3
        • 2.Qe3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Sa7
        • 2.Qd4#
      • 1...Se7
        • 2.Qd4#
      • 1...Sb8
        • 2.Qd4#
      • 1...Sd8
        • 2.Qd4#
      • 1...b3!
    • 1.Qxc6?
      • threat
        • 2.Qe8#
      • 1...d4
        • 2.Qe4#
        • 2.Qc5#
      • 1...f3!
    • 1.e3?
      • threat
        • 2.exf4#
      • 1...fxe3
        • 2.Qxe3#
      • 1...d4
        • 2.Qc5#
      • 1...f3!
    • 1.e4?
      • threat
        • 2.Sf7#
      • 1...dxe4
        • 2.Qc5#
      • 1...fxe4 ep
        • 2.Qxe3#
      • 1...Sd8!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh8#
      • 1...f3
        • 2.Qh2#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR2(A)
    • P(c);OGATEB::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
        • P(c);OGATEB,P_SPINP(c)::QAR2(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);P_PINP(c)
      • Vars
        • P(b);N_GUARD::QAR2(A)
        • S(e);N_GUARD::QAB1(A),XS(e)
        • S(e);N_GUARD::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);XS(e)
      • Threat
        • QAR(A)
      • Refutation
        • P(b);
    • Try
      • P(B);
      • Threat
        • P(B),XP(b)
      • Vars
        • P(b);OGATE,XP(B)::QAR2(A),XP(b)
        • P(c);OGATEB::QAR2(A)
      • Refutation
        • P(b);
    • Try
      • P(B);
      • Threat
        • S(F)
      • Vars
        • P(c);OGATEB,XP(B)::QAR2(A)
        • P(b);EP,OGATEB,XP(B)::QAR2(A),XP(b)
      • Refutation
        • S(e);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(b);OGATEB::QAB(A)
      • P(c);N_GUARD::QAR1(A)
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