MESON Chess Problem Database

Problem Display
PID: 90498 (7K/B2p4/2Rp4/pP1PN3/pkP4Q/p2R4/rnPPN3/bb1n4 w - - 0 1)

Stocchi, Ottavio

Die Schwalbe, 1951

7K/B2p4/2Rp4/pP1PN3/pkP4Q/p2R4/rnPPN3/bb1n4

#2

12 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.dxc3#
    • 1...Sxc4
      • 2.Qxc4#
    • 1...dxe5
      • 2.Bc5#
    • 1...dxc6
      • 2.Sxc6#
  • Tries
    • 1.Sd4?
      • 1...Bxc2
        • 2.Sxc2#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...dxc6
        • 2.Sdxc6#
      • 1...Sf2
        • 2.c3#
      • 1...Sc3
        • 2.dxc3#
      • 1...Se3
        • 2.c3#
      • 1...dxe5!
    • 1.Qd4?
      • 1...Sxd3
        • 2.Sxd3#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...dxe5
        • 2.Bc5#
        • 2.Qc5#
      • 1...dxc6
        • 2.Sxc6#
      • 1...Sf2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Se3
        • 2.Qc3#
      • 1...Bxc2!
    • 1.c3+?
      • 1...Kb3
        • 2.Sd4#
      • 1...Sxc3!
    • 1.c5+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kxb5!
  • Keys
    • 1.Sc1!
      • 1...Bxc2
        • 2.Sxa2#
      • 1...Sxd3
        • 2.Sxd3#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...dxe5
        • 2.Bc5#
      • 1...dxc6
        • 2.Sxc6#
      • 1...Sf2
        • 2.c3#
      • 1...Sc3
        • 2.dxc3#
      • 1...Se3
        • 2.c3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE::P(B),XS(c)
    • S(e);OGATE,P_PINS(I),P_SPINS(e),XP(E)::QAR1(F),XS(e)
    • P(j);N_GUARD,XS(I)::B(K)
    • P(k);XR(J)::S(I),XP(k)
  • Tries
    • Try
      • S(C);
      • Vars
        • B(b);XP(A)::S(C),XB(b)
        • S(e);XR(D)::S(I),XS(e)
        • S(e);OGATE,XP(E)::R1(J),XS(e)
        • P(k);XR(J)::S(C),XP(k)
        • S(c);N_GUARD::P(A)
        • S(c);OGATE::P(B),XS(c)
      • Refutation
        • P(j);XS(I)
    • Try
      • Q(F);
      • Vars
        • S(e);XR(D)::S(I),XS(e)
        • S(e);OGATE,P_SPINS(e),XP(E)::QAR1(F),XS(e)
        • P(k);XR(J)::S(I),XP(k)
        • S(c);N_GUARD::QAB1(F)
      • Refutation
        • B(b);XP(A)
    • Try
      • P(A);CHECK
      • Vars
        • K(h);P-FLIGHT::S(C)
      • Refutation
        • S(c);XP(A)
    • Try
      • P(E);CHECK
      • Vars
        • S(e);N_GUARD,P_PINS(I),P_SPINS(e)::QAR1(F),XS(e)
      • Refutation
        • K(h);P-FLIGHT,XP(G)
  • Actual
    • S(C);
    • Vars
      • B(b);N_GUARD,XP(A)::S(C),XR(d)
      • S(e);P_PINS(I),XR(D)::S(C),XS(e)
      • S(e);OGATE,P_PINS(I),P_SPINS(e),XP(E)::QAR1(F),XS(e)
      • P(j);N_GUARD,XS(I)::B(K)
      • P(k);XR(J)::S(I),XP(k)
      • S(c);N_GUARD::P(A)
      • S(c);OGATE::P(B),XS(c)
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