MESON Chess Problem Database

Problem Display
PID: 48444 (b2R3B/2KNR1r1/Nn3P2/2pp4/3k1P2/1p1P3n/2qPP3/2Q4B w - - 0 1)

Piatesi, Antonio

1st Prize, Het Belgisch Schaakbord (L'Echiquier Belge), 1976-1977

b2R3B/2KNR1r1/Nn3P2/2pp4/3k1P2/1p1P3n/2qPP3/2Q4B

#2

13 + 9

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qc3#
      • 2.Qxc5#
    • 1...Qd1
      • 2.Qb2#
      • 2.Qc3#
      • 2.Qxc5#
    • 1...Qxd3
      • 2.Qxc5#
    • 1...Qa2
      • 2.Qc3#
      • 2.Qxc5#
    • 1...Qb2
      • 2.Qxb2#
      • 2.Qxc5#
    • 1...Qxd2
      • 2.Qxc5#
    • 1...Qc3
      • 2.Qxc3#
      • 2.dxc3#
    • 1...Rxe7
      • 2.fxe7#
    • 1...Sg5
      • 2.Qg1#
  • Tries
    • 1.Sf8?
      • threat
        • 2.Se6#
      • 1...Rxe7+
        • 2.fxe7#
      • 1...Qxd2
        • 2.Qxc5#
      • 1...Sg5
        • 2.Qg1#
      • 1...Sxf4!
    • 1.Qb2+?
      • 1...Qc3
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Qxb2!
    • 1.Qa1+?
      • 1...Qb2
        • 2.Qxb2#
      • 1...Qc3
        • 2.Qxc3#
        • 2.dxc3#
      • 1...b2!
    • 1.Qxc2?
      • threat
        • 2.Qb2#
        • 2.Qc3#
        • 2.Qxc5#
        • 2.e3#
      • 1...Rxe7
        • 2.Qb2#
        • 2.Qc3#
        • 2.Qxc5#
        • 2.fxe7#
      • 1...Sxd7
        • 2.Qb2#
        • 2.Qc3#
        • 2.e3#
      • 1...Rg3
        • 2.Qb2#
        • 2.Qc3#
        • 2.Qxc5#
      • 1...Sa4
        • 2.e3#
      • 1...Sc4
        • 2.Qc3#
      • 1...b2
        • 2.Qxb2#
        • 2.Qc3#
        • 2.Qxc5#
        • 2.e3#
      • 1...c4
        • 2.Qc3#
        • 2.e3#
      • 1...bxc2!
  • Keys
    • 1.Sdxc5!
      • threat
        • 2.e3#
      • 1...Qxc5+
        • 2.Qxc5#
      • 1...Rxe7+
        • 2.fxe7#
      • 1...Qxd3
        • 2.Se6#
      • 1...Qxd2
        • 2.Sxb3#
      • 1...Rg3
        • 2.Re4#
      • 1...Sc4
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(a);OGATE,XP(E)::QAB1(A),XP(e)
    • Q(a);OGATE,XP(C)::QAB1(A),XP(e)
    • R(h);OGATE,P_PINS(J),XR(K)::B(M)+P(H),XR(h)
    • S(c);N_GUARD,S_CUTR(h)::QAB(A)
  • Tries
    • Try
      • S(J);P_PINP(f),P_SPINR(K)
      • Threat
        • S(J)
      • Vars
        • R(h);CHECK,OGATE,XR(K)::B(M)+P(H),XR(h)
        • Q(a);OGATE,XP(C)::QAB1(A),XP(e)
        • S(c);N_GUARD,S_CUTR(h)::QAB(A)
      • Refutation
        • S(c);XP(F)
    • Try
      • Q(A);CHECK
      • Refutation
        • Q(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB(A),XQ(a)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(A);XQ(a)
      • Threat
        • DUALS(4)
      • Vars
        • S(g);::P(D)
        • S(g);::QAB1(A)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • S(J);P_PINP(f),P_SPINR(K),P_SPINS(J),XP(e)
    • Threat
      • P(D)
    • Vars
      • Q(a);CHECK,OGATE,XS(J)::QAB1(A),XQ(a)
      • R(h);CHECK,OGATE,XR(K)::B(M)+P(H),XR(h)
      • Q(a);N_PINS(J),XP(E)::S(J)
      • Q(a);N_PINS(J),XP(C)::S(J),XP(b)
      • R(h);N_PINR(K)::R1(K)
      • S(g);N_PINS(J)::S(J)
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