MESON Chess Problem Database

Problem Display
PID: 150370 (8/K1N5/8/P1QP4/q1pp4/P1k5/1b1N4/1B1R4 w - - 0 1)

Agostini, Valerio

Problem Observer, 2010

8/K1N5/8/P1QP4/q1pp4/P1k5/1b1N4/1B1R4

#2

9 + 5

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd1
      • 2.Qb4#
    • 1...Qc2
      • 2.Qxc4#
    • 1...Qb3
      • 2.Se4#
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qc6
      • 2.Qb4#
    • 1...Qd7
      • 2.Qb4#
      • 2.Qxc4#
    • 1...Qe8
      • 2.Qb4#
      • 2.Qxc4#
    • 1...Qxa3
      • 2.Sb5#
      • 2.Qxc4#
    • 1...Qb4
      • 2.Qxb4#
    • 1...Qxa5+
      • 2.Qxa5#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Se4#
      • 1...Qxa5+
        • 2.Qxa5#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qe8
        • 2.Qb4#
      • 1...Qb4
        • 2.Qxb4#
      • 1...Qc2!
    • 1.Qb5?
      • threat
        • 2.Se4#
      • 1...Qxa5+
        • 2.Qxa5#
      • 1...Qxb5
        • 2.Sxb5#
      • 1...Qc2
        • 2.Qxc4#
      • 1...Qb4
        • 2.Qxb4#
      • 1...d3!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Rd3#
      • 1...Qxa5+
        • 2.Sxa5#
      • 1...Kb3
        • 2.Sd2#
      • 1...Qxd1
        • 2.Qb4#
      • 1...Qc2
        • 2.Qb4#
      • 1...d3
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,N_PINP(E),XR(B)::QAB1(F)
    • Q(c);N_GUARD,N_PINP(E)::QAR1(F),XP(d)
    • Q(c);N_PINP(E),SBLOCK::S(C)
    • Q(c);N_GUARD,N_PINP(E)::S(I),XQ(c)
    • Q(c);N_GUARD,N_PINP(E)::QAB1(F)
    • Q(c);N_GUARD,N_PINP(E)::QAB1(F),XQ(c)
    • Q(c);CHECK,OGATE,XP(E)::QAB(F),XQ(c)
  • Tries
    • Try
      • Q(F);N_PINP(d)
      • Threat
        • S(C)
      • Vars
        • Q(c);CHECK,OGATE,XP(E)::QAB(F),XQ(c)
        • Q(c);N_GUARD,N_PINP(E)::S(I),XQ(c)
        • Q(c);N_GUARD,N_PINP(E)::QAB1(F)
        • Q(c);N_GUARD,N_PINP(E)::QAB1(F),XQ(c)
      • Refutation
        • Q(c);N_PINP(E)
    • Try
      • Q(F);N_PINP(d)
      • Threat
        • S(C)
      • Vars
        • Q(c);CHECK,OGATE,XP(E)::QAB(F),XQ(c)
        • Q(c);N_PINP(E),XQ(F)::S(I),XQ(c)
        • Q(c);N_GUARD,N_PINP(E)::QAR1(F),XP(d)
        • Q(c);N_GUARD,N_PINP(E)::QAB1(F),XQ(c)
      • Refutation
        • P(e);
  • Actual
    • S(C);XP(d)
    • Threat
      • R1(B)
    • Vars
      • Q(c);CHECK,XP(E)::QAR(F)+S(C),XQ(c)
      • K(b);P-FLIGHT::S(C)
      • Q(c);N_GUARD,N_PINP(E),XR(B)::QAB1(F)
      • Q(c);N_GUARD,N_PINP(E)::QAB1(F)
      • P(e);::R1(B),XP(e)
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