MESON Chess Problem Database

Problem Display
PID: 28218 (BB6/1R1pR2n/p2b2N1/r5rp/4N3/3p1kpK/3PpP2/4n1Q1 w - - 0 1)

Stocchi, Ottavio

1st Sp. Prize, Xadrez Brasileiro (Arguelles TT), 1934

BB6/1R1pR2n/p2b2N1/r5rp/4N3/3p1kpK/3PpP2/4n1Q1

#2

10 + 12

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Sh4#
    • 1...Bb4
      • 2.Sh4#
    • 1...Bf4
      • 2.Sh4#
    • 1...Bc5
      • 2.Sh4#
    • 1...Sc2
      • 2.Qg2#
    • 1...Sg2
      • 2.Qxg2#
    • 1...gxf2
      • 2.Qxf2#
  • Tries
    • 1.Sxg5+?
      • 1...Rxg5
        • 2.Re3#
      • 1...Sxg5+!
    • 1.Qh1+?
      • 1...Sg2
        • 2.Qxg2#
      • 1...g2!
    • 1.fxg3?
      • threat
        • 2.Sh4#
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rxg6
        • 2.Qf2#
        • 2.Qe3#
      • 1...Bxg3
        • 2.Qe3#
      • 1...Bxe7
        • 2.Qe3#
      • 1...Rae5
        • 2.Qe3#
      • 1...Rge5
        • 2.Qe3#
      • 1...Be5
        • 2.Qe3#
      • 1...Rg4
        • 2.Qf2#
        • 2.Qe3#
      • 1...Bf4
        • 2.Sh4#
        • 2.Qf2#
      • 1...Bc5
        • 2.Sh4#
      • 1...Sc2
        • 2.Sh4#
        • 2.Qf2#
        • 2.Qh1#
        • 2.Qg2#
      • 1...Sg2
        • 2.Qf2#
        • 2.Qxg2#
      • 1...h4
        • 2.Sxh4#
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rxg3+!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Re3#
      • 1...Rxg6
        • 2.Rb4#
      • 1...Bxc5
        • 2.Sh4#
      • 1...Bxe7
        • 2.Sh4#
      • 1...Re5
        • 2.Qxg3#
      • 1...Bf4
        • 2.Sh4#
      • 1...Be5
        • 2.Rbxd7#
      • 1...Sc2
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(j);::S(F)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • P(e);OGATE,XP(C)::QAR1(A),XP(e)
  • Tries
    • Try
      • S(E);CHECK,XR(g)
      • Vars
        • R(f);XS(E)::R1(H)
      • Refutation
        • S(l);CHECK,XS(E)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • P(C);XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • B(j);XP(C)::QAR1(A)
        • B(j);XR(H)::QAR1(A)
        • R(f);::QAR1(A)
        • R(g);::QAR1(A)
        • B(j);::QAR1(A)
        • B(j);::S(F)
      • Refutation
        • R(g);CHECK,XP(C)
  • Actual
    • S(E);
    • Threat
      • R1(H)
    • Vars
      • R(g);N_GUARD,XS(F)::B(I)+R(G)
      • B(j);XS(E)::S(F)
      • B(j);XR(H)::S(F)
      • R(g);N_GUARD,S_CUTB(j)::QAR1(A),XP(e)
      • B(j);::S(F)
      • B(j);S_CUTR(g)::B(I)+R(G),XP(k)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
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