MESON Chess Problem Database

Problem Display
PID: 43385 (4K3/8/B1nPpp2/1N2b3/p3k1P1/rQ1RP2n/2bP1rP1/5N2 w - - 0 1)

Stocchi, Ottavio

2nd HM., Die Schwalbe, 1950/II

4K3/8/B1nPpp2/1N2b3/p3k1P1/rQ1RP2n/2bP1rP1/5N2

#2

11 + 10

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Sxd2#
    • 1...Rf4
      • 2.Sg3#
    • 1...Sf4
      • 2.Sg3#
    • 1...Sd4
      • 2.Sc3#
  • Tries
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Sc3#
      • 1...Bxd4!
    • 1.Qc4+?
      • 1...Sd4
        • 2.Bb7#
      • 1...Bd4!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Qd5#
      • 1...Kxd3
        • 2.Sc3#
      • 1...Rxd3
        • 2.Sg3#
      • 1...Bxd3
        • 2.Sg3#
      • 1...Bb3
        • 2.Sc3#
      • 1...Sf4
        • 2.Qf5#
      • 1...Sb4
        • 2.Rd4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Se7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(b);XP(B)::S(A),XR(b)
    • R(b);S_CUTB(g)::S(A)
    • S(d);S_CUTB(g)::S(A)
    • S(h);S_CUTB(g)::S(H)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(h);XR(E)::S(H)
      • Refutation
        • B(g);XR(E)
    • Try
      • Q(D);CHECK
      • Vars
        • S(h);P_SPINS(h),S_CUTB(g)::B(I)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • Q(D);P_PINB(g),XP(i)
    • Threat
      • QAB1(D)
    • Vars
      • K(f);N_SPINB(g),S_FLIGHT,XR(E)::B(I)+S(H)
      • R(c);SBLOCK,XR(E)::S(A)
      • B(a);SBLOCK,XR(E)::S(A)
      • B(a);S_CUTR(c)::S(H)
      • S(d);S_CUTR(b)::QAB1(D)
      • S(h);N_GUARD::R1(E)
      • S(h);N_GUARD::R1(E),XS(h)
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