MESON Chess Problem Database

Problem Display
PID: 67686 (8/1N2Q3/4P3/3N4/3kB2R/2pr2n1/K2ppb2/8 w - - 0 1)

Stocchi, Ottavio

2nd HM., Die Schwalbe, 1957

8/1N2Q3/4P3/3N4/3kB2R/2pr2n1/K2ppb2/8

#2

7 + 7

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb4#
    • 1...Ke5
      • 2.Qf6#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Bd5#
      • 1...Ke5
        • 2.Qg7#
      • 1...Ke3!
    • 1.Bh1+?
      • 1...Ke5
        • 2.Qf6#
      • 1...Se4!
    • 1.Bg2+?
      • 1...Ke5
        • 2.Qf6#
      • 1...Se4!
    • 1.Bf3+?
      • 1...Ke5
        • 2.Qf6#
      • 1...Se4!
    • 1.Bg6+?
      • 1...Kxd5
        • 2.Qd6#
      • 1...Ke5
        • 2.Qd6#
      • 1...Se4!
    • 1.Bh7+?
      • 1...Kxd5
        • 2.Qd6#
      • 1...Ke5
        • 2.Qd6#
      • 1...Se4!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qc5#
      • 1...Ke3
        • 2.Sc2#
      • 1...Kc4
        • 2.Bxd3#
      • 1...Ke5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(g);P-FLIGHT::QAR1(G)
    • K(g);S_FLIGHT::QAB1(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(G)
      • Vars
        • K(g);P-FLIGHT::R(C)+B(B),DCHECK
        • K(g);S_FLIGHT::QAB(G)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(g);S_FLIGHT::QAB1(G)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • B(B);CHECK
      • Vars
        • K(g);S_FLIGHT::QAB1(G)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • B(B);CHECK
      • Vars
        • K(g);S_FLIGHT::QAB1(G)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • B(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XS(D)::QAR1(G)
        • K(g);S_FLIGHT::QAB1(G)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • B(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XS(D)::QAR1(G)
        • K(g);S_FLIGHT::QAB1(G)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • S(D);
    • Threat
      • QAB1(G)
    • Vars
      • K(g);S_FLIGHT::S(D)
      • K(g);P-FLIGHT::R(C)+B(B),DCHECK,XR(e)
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