MESON Chess Problem Database

Problem Display
PID: 18649 (2Qn4/6K1/3P1R2/3Pk2p/1p2P3/pN4n1/p3RP2/5r1B w - - 0 1)

Stocchi, Ottavio

1st Prize, Il Due Mosse, 1957

2Qn4/6K1/3P1R2/3Pk2p/1p2P3/pN4n1/p3RP2/5r1B

#2

10 + 8

3976 FIDE Album (1956-1958) 1961
5862 An ABC of Chess Problems 1970
5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.f4#
    • 1...Rb1
      • 2.f4#
    • 1...Rc1
      • 2.f4#
    • 1...Rd1
      • 2.f4#
    • 1...Re1
      • 2.f4#
    • 1...Rg1
      • 2.f4#
    • 1...Rxh1
      • 2.f4#
    • 1...Sxh1
      • 2.Qf5#
    • 1...Sxe2
      • 2.Qf5#
    • 1...Sxe4
      • 2.Qf5#
    • 1...Sf5+
      • 2.Qxf5#
    • 1...Sc6
      • 2.Qe6#
    • 1...Se6+
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qe6#
      • 2.Qe8#
    • 1...Sf7
      • 2.Qe6#
      • 2.Qe8#
  • Tries
    • 1.Rf5+?
      • 1...Kxd6
        • 2.Qxd8#
      • 1...Sxf5+!
    • 1.Qxd8?
      • threat
        • 2.Qe7#
        • 2.Qe8#
      • 1...Sf5+
        • 2.Rxf5#
      • 1...Sxe4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qf4#
      • 1...Sf5+
        • 2.exf5#
      • 1...Se6+
        • 2.Rxe6#
      • 1...Rxc1
        • 2.f4#
      • 1...Rxf2
        • 2.Qa1#
      • 1...Sxe2
        • 2.Qg5#
      • 1...Sxe4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::P(C)
    • R(a);N_GUARD,XB(A)::P(C)
    • S(d);N_GUARD,XB(A)::QAR1(J)
    • S(d);N_GUARD,XR(B)::QAR1(J)
    • S(d);N_GUARD,P_SPINS(d),XP(E)::QAR1(J)
    • S(d);CHECK,N_GUARD::QAR1(J),XS(d)
    • S(h);N_GUARD::QAR1(J)
    • S(h);CHECK,N_GUARD::QAR1(J),XS(h)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(f);S_FLIGHT,XP(G)::QAR2(J),XS(h)
      • Refutation
        • S(d);CHECK,XR(H)
    • Try
      • Q(J);XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);CHECK,N_GUARD::R1(H),XS(d)
      • Refutation
        • S(d);P_SPINS(d),XP(E)
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • S(d);CHECK,OGATE::R(B)+P(E),XS(d)
      • S(h);CHECK,N_GUARD::R1(H),XS(h)
      • R(a);N_GUARD,XQ(J)::P(C)
      • R(a);N_GUARD,XP(C)::QAB(J)
      • S(d);N_GUARD,XR(B)::QAR2(J)
      • S(d);N_GUARD,P_SPINS(d),XP(E)::QAR2(J)
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