MESON Chess Problem Database

Problem Display
PID: 25694 (8/8/2P1r3/6n1/1N1kP3/R2N4/n3P3/K1Q5 w - - 0 1)

Stocchi, Ottavio

L'Enigmistica Popolare, 1932

8/8/2P1r3/6n1/1N1kP3/R2N4/n3P3/K1Q5

#2

8 + 4

3100 Selected Stocchi (I) 2001
14475 Mat Plus Review 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qf4#
    • 1...Rxe4
      • 2.Qc5#
    • 1...Sxe4
      • 2.e3#
  • Tries
    • 1.Qe3+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe3!
    • 1.Qg1+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe4!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Sxa2#
      • 1...Kxe4
        • 2.Qf4#
      • 1...Rxe4
        • 2.Qc5#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...Sxc1
        • 2.Sd5#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Sxe4
        • 2.e3#
      • 1...Sc3
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
    • R(d);SBLOCK,XP(G)::QAB1(B)
    • S(c);SBLOCK,XP(G)::P(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT,XP(G)
  • Actual
    • R(D);
    • Threat
      • R(D)+S(F),XS(a)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
      • R(d);SBLOCK,XP(G)::QAB1(B)
      • R(d);XP(H)::R(D)+S(F),DCHECK,XR(d)
      • S(a);N_GUARD,XQ(B)::R(D)+S(F)
      • S(a);OGATE,P_SPINS(a),XS(F)::R(D),XS(a)
      • S(c);SBLOCK,XP(G)::P(C)
      • S(a);SBLOCK::R(D)+S(F),DCHECK
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