MESON Chess Problem Database

Problem Display
PID: 91603 (n6N/Q3n1p1/4b1R1/2KPkB2/1R3p1P/2pp1p1q/3rpB1N/b7 w - - 0 1)

Stocchi, Ottavio

Probleemblad, 1959

n6N/Q3n1p1/4b1R1/2KPkB2/1R3p1P/2pp1p1q/3rpB1N/b7

#2

10 + 13

14475 Mat Plus Review 2007
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Sxf3#
    • 1...Bxf5
      • 2.Sf7#
    • 1...Sxf5
      • 2.Rxe6#
  • Tries
    • 1.Sg4+?
      • 1...Kxf5
        • 2.Rg5#
      • 1...Qxg4!
    • 1.Bxd3?
      • threat
        • 2.Bd4#
      • 1...Sf5
        • 2.Re4#
        • 2.Rxe6#
      • 1...Sc6
        • 2.Qxg7#
      • 1...c2
        • 2.Qxa1#
      • 1...Rxd3!
    • 1.Bxe6?
      • threat
        • 2.Sf7#
      • 1...Sxg6
        • 2.Qxg7#
      • 1...Qf5
        • 2.Sxf3#
      • 1...Qxe6!
    • 1.Qb8+?
      • 1...Kxf5
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Sc7!
    • 1.Qc7+?
      • 1...Kxf5
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Sxc7!
    • 1.Qxe7?
      • threat
        • 2.Qxe6#
      • 1...Kxf5
        • 2.Rg5#
        • 2.Qg5#
        • 2.Qxe6#
      • 1...Qxf5
        • 2.Sxf3#
        • 2.Qd6#
      • 1...Sc7!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Bd4#
      • 1...Kf6
        • 2.Bd4#
      • 1...Qxf5
        • 2.Sg4#
      • 1...Bxf5
        • 2.Qxe7#
      • 1...Sxf5
        • 2.Qxg7#
      • 1...Sc6
        • 2.Qxg7#
      • 1...c2
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(g);N_GUARD,SBLOCK,XB(G)::S(B),XP(f)
    • B(j);N_GUARD,SBLOCK,XB(G)::S(J)
    • S(k);SBLOCK,XB(G)::R1(H),XB(j)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(i);P-FLIGHT,XB(G)::R1(H)
      • Refutation
        • Q(g);XS(B)
    • Try
      • B(G);XP(e)
      • Threat
        • B(A)
      • Vars
        • S(k);OGATE::QAB(I),XP(l)
        • P(d);OGATEB::QAB(I),XB(a)
      • Refutation
        • R(b);XB(G)
    • Try
      • B(G);XB(j)
      • Threat
        • S(J)
      • Vars
        • S(k);OGATE,XR(H)::QAB(I),XP(l)
        • Q(g);N_GUARD::S(B),XP(f)
      • Refutation
        • Q(g);XB(G)
    • Try
      • Q(I);CHECK
      • Refutation
        • S(m);P_SPINS(m)
    • Try
      • Q(I);CHECK
      • Refutation
        • S(m);XQ(I)
    • Try
      • Q(I);P_PINB(j),XS(k)
      • Threat
        • QAR1(I),XB(j)
      • Refutation
        • S(m);
  • Actual
    • R(H);
    • Threat
      • B(A)
    • Vars
      • K(i);S_FLIGHT::B(A)
      • Q(g);N_GUARD,P_SPINQ(g),XB(G)::S(B)
      • B(j);OGATEB,P_SPINB(j),XB(G)::QAR2(I),XS(k)
      • S(k);OGATE,P_SPINS(k),XB(G)::QAB(I),XP(l)
      • S(k);OGATE::QAB(I),XP(l)
      • P(d);OGATEB::QAB(I),XB(a)
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