MESON Chess Problem Database

Problem Display
PID: 81178 (3Qn3/2pb3r/4p3/4Pp2/3k4/2pN2R1/B5P1/K1N1R3 w - - 0 1)

Garofalo, Antonio

Le Courrier des Echecs, 1985

3Qn3/2pb3r/4p3/4Pp2/3k4/2pN2R1/B5P1/K1N1R3

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sg7
      • 2.Qxd7#
  • Tries
    • 1.Re4+?
      • 1...fxe4
        • 2.Se2#
      • 1...Kxe4!
    • 1.Rg4+?
      • 1...f4
        • 2.Rxf4#
      • 1...fxg4!
    • 1.Qh4+?
      • 1...f4
        • 2.Qxf4#
      • 1...Rxh4!
    • 1.Qg5?
      • threat
        • 2.Qe3#
        • 2.Qf4#
      • 1...Rh4
        • 2.Qe3#
      • 1...Bc6
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
      • 1...Sf6
        • 2.Qe3#
      • 1...f4
        • 2.Qxf4#
      • 1...c2!
    • 1.Qxc7?
      • threat
        • 2.Qb6#
        • 2.Qc4#
        • 2.Qc5#
        • 2.Qa7#
      • 1...Ba4
        • 2.Qb6#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Bb5
        • 2.Qb6#
        • 2.Qc5#
      • 1...Bc6
        • 2.Qb6#
      • 1...Bc8
        • 2.Qb6#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sd6
        • 2.Qb6#
        • 2.Qxd6#
        • 2.Qc5#
        • 2.Qa7#
      • 1...c2
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sxc7!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Se2#
      • 1...Bc6
        • 2.Qa7#
      • 1...c6
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(h);N_GUARD,S_CUTR(g)::QAR(I),XB(f)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • P(c);SBLOCK,XR(C)::S(B)
      • Refutation
        • K(b);N_SPINB(f),P-FLIGHT,XR(C)
    • Try
      • R(G);CHECK
      • Vars
        • P(c);P_SPINP(c)::R(G),XP(c)
      • Refutation
        • P(c);XR(G)
    • Try
      • Q(I);CHECK,N_PINB(f)
      • Vars
        • P(c);P_SPINP(c)::QAR2(I),XP(c)
      • Refutation
        • R(g);XQ(I)
    • Try
      • Q(I);N_PINB(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(g);::QAB1(I)
        • B(f);::QAB1(I)
        • S(h);::QAB1(I)
        • P(c);::QAR2(I),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(I);N_PINB(f),XP(e)
      • Threat
        • DUALS(4)
      • Vars
        • B(f);::QAB(I)
      • Refutation
        • S(h);XQ(I)
  • Actual
    • Q(I);N_PINB(f)
    • Threat
      • S(B)
    • Vars
      • B(f);S_CUTP(e)::QAB(I)
      • P(e);S_CUTB(f)::QAR(I)
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