MESON Chess Problem Database

Problem Display
PID: 28155 (8/b1R3B1/Kn6/pQ1P4/pNn1B3/rk1p1R1r/pPN5/4q3 w - - 0 1)

Stocchi, Ottavio

2nd Prize, Il Problema, 1934/I

8/b1R3B1/Kn6/pQ1P4/pNn1B3/rk1p1R1r/pPN5/4q3

#2

10 + 11

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sa1#
    • 1...Qf2
      • 2.Sa1#
    • 1...Qg3
      • 2.Sa1#
    • 1...Qxb4
      • 2.Sa1#
    • 1...Qh4
      • 2.Sa1#
    • 1...Qa1
      • 2.Sxa1#
    • 1...Qe2
      • 2.Sa1#
    • 1...Qe3
      • 2.Sa1#
    • 1...Qxe4
      • 2.Sa1#
    • 1...Sxb2
      • 2.Sd4#
    • 1...Sd2
      • 2.Sxd3#
      • 2.Qxd3#
    • 1...Sxd5
      • 2.Qxc4#
    • 1...Sd7
      • 2.Qxc4#
    • 1...Sa8
      • 2.Qxc4#
    • 1...Sc8
      • 2.Qxc4#
  • Tries
    • 1.Sxd3+?
      • 1...Qb4
        • 2.Sa1#
        • 2.Sd4#
        • 2.Sc1#
        • 2.Sc5#
      • 1...Kxc2!
    • 1.Sc6+?
      • 1...Qb4
        • 2.Sa1#
      • 1...Kxc2!
  • Keys
    • 1.Rf2!
      • threat
        • 2.Sd4#
      • 1...Qxf2
        • 2.Sa1#
      • 1...Qxe4
        • 2.Sa1#
        • 2.Sxd3#
        • 2.Sc6#
      • 1...Sxd5
        • 2.Qxc4#
      • 1...dxc2
        • 2.Bxc2#
      • 1...Qc3
        • 2.Sa1#
      • 1...Qd2
        • 2.Sa1#
      • 1...Qe2
        • 2.Sa1#
      • 1...Qe3
        • 2.Sa1#
        • 2.Sxd3#
        • 2.Sc6#
      • 1...Sd2
        • 2.Sxd3#
      • 1...Sd7
        • 2.Qxc4#
      • 1...Sa8
        • 2.Qxc4#
      • 1...Sc8
        • 2.Qxc4#
      • 1...d2
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::S(B)
    • Q(a);N_GUARD,P_SPINQ(a),XS(D)::S(B)
    • Q(a);N_GUARD::S(B),XQ(a)
    • Q(a);N_GUARD,N_SPINP(e)::S(B)
    • Q(a);N_GUARD,XB(E)::S(B)
    • S(h);SBLOCK,XP(A)::S(B)
    • S(j);N_GUARD,XP(G)::QAB1(F),XS(h)
    • S(j);N_GUARD::QAB1(F),XS(h)
  • Tries
    • Try
      • S(D);CHECK,XP(e)
      • Refutation
        • K(d);P_SPINS(h),S_FLIGHT,XS(B)
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(B)
      • Refutation
        • K(d);S_FLIGHT,XS(B)
  • Actual
    • R(C);N_PINP(e)
    • Threat
      • S(B)
    • Vars
      • Q(a);N_GUARD,XR(C)::S(B)
      • S(j);N_GUARD,XP(G)::QAB1(F),XS(h)
      • P(e);OGATE,XS(B)::B(E),XP(e)
      • Q(a);N_GUARD::S(B)
      • S(h);S_CUTQ(a)::QAR(F)+S(D),XP(e)
      • S(j);N_GUARD::QAB1(F),XS(h)
      • P(e);S_CUTQ(a)::QAR(F)+S(D)
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