MESON Chess Problem Database

Problem Display
PID: 141306 (6K1/7B/2pb2N1/3k4/4Rp2/5p2/3P1n2/1Q4B1 w - - 0 1)

Valle, Giovanni Batista

Source?, 1892

6K1/7B/2pb2N1/3k4/4Rp2/5p2/3P1n2/1Q4B1

#2

7 + 6

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd3#
    • 1...Sh1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qd3#
    • 1...Sxe4
      • 2.Qa2#
      • 2.Qb3#
    • 1...Sg4
      • 2.Qd3#
    • 1...c5
      • 2.Qb7#
  • Tries
    • 1.Sxf4+?
      • 1...Kc5
        • 2.Bxf2#
        • 2.Qb4#
      • 1...Bxf4!
    • 1.Se7+?
      • 1...Kc5
        • 2.Bxf2#
        • 2.Qb4#
      • 1...Bxe7!
    • 1.Qa2+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Kxe4!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Bxf2#
      • 1...Sxd3!
    • 1.Qb2?
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Se7#
      • 1...Sxe4
        • 2.Qa2#
        • 2.Qb3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bc5
        • 2.Qe5#
      • 1...c5
        • 2.Qb7#
      • 1...Kc5!
    • 1.Qb3+?
      • 1...Kc5
        • 2.Bxf2#
        • 2.d4#
      • 1...Kxe4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Se7#
      • 1...Kc5
        • 2.Qa5#
      • 1...Sxe4
        • 2.Qa2#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bc5
        • 2.Qe5#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAR2(A)
    • S(a);N_GUARD::QAR2(A),XS(a)
    • P(e);OGATEB,SBLOCK::QAB(A)
  • Tries
    • Try
      • S(E);CHECK,XP(c)
      • Refutation
        • B(f);XS(E)
    • Try
      • S(E);CHECK
      • Refutation
        • B(f);XS(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(a)::QAR2(A)
      • Refutation
        • K(d);S_FLIGHT,XR(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(a)::B(B),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);S_FLIGHT,XR(D)::B(F)+S(E)
        • B(f);N_GUARD::QAR1(A),XB(f)
        • B(f);N_GUARD,SBLOCK::QAR1(A)
        • P(e);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(d);S_FLIGHT,XR(D)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(d);S_FLIGHT,XR(D)::B(F)+S(E)
      • K(d);P-FLIGHT,P_SPINS(a)::QAR2(A)
      • S(a);SBLOCK,XR(D)::QAB(A)
      • B(f);N_GUARD::QAR1(A),XB(f)
      • B(f);N_GUARD,SBLOCK::QAR1(A)
      • P(e);OGATEB,SBLOCK::QAB(A)
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