MESON Chess Problem Database

Problem Display
PID: 33633 (3N4/6pK/r3p1Qp/nRPk4/1r2p3/2B5/1N4B1/7b w - - 0 1)

Stocchi, Ottavio

2nd Prize, Parallele 50, 1949/II

3N4/6pK/r3p1Qp/nRPk4/1r2p3/2B5/1N4B1/7b

#2

8 + 9

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2
      • 2.Qxe4#
    • 1...Rb3
      • 2.Qxe4#
    • 1...Ra7
      • 2.Qxe6#
    • 1...Ra8
      • 2.Qxe6#
    • 1...Sc4
      • 2.Qxe4#
    • 1...Sc6
      • 2.Qxe6#
  • Tries
    • 1.Qf5+?
      • 1...e5
        • 2.Qxe5#
      • 1...exf5!
    • 1.Qh5+?
      • 1...e5
        • 2.Qxe5#
      • 1...g5!
    • 1.Qg5+?
      • 1...e5
        • 2.Qxe5#
      • 1...hxg5!
    • 1.Qf6?
      • threat
        • 2.Qe5#
      • 1...Rxb2
        • 2.Qd4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sc6
        • 2.Qxe6#
      • 1...e5
        • 2.Qxe5#
      • 1...gxf6!
    • 1.Qxg7?
      • threat
        • 2.Qe5#
      • 1...Rxb2
        • 2.Qd4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sc6
        • 2.Qd7#
      • 1...e5
        • 2.Qxe5#
      • 1...Ra7!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe5#
      • 1...Rxb2
        • 2.Qd3#
      • 1...Rd4
        • 2.c6#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sc6
        • 2.Qd6#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD,XS(A)::QAB1(F),XP(c)
    • R(b);N_GUARD::QAB1(F),XP(c)
    • R(f);N_GUARD::QAB1(F),XP(g)
    • S(d);S_CUTR(b)::QAB1(F),XP(c)
    • S(d);S_CUTR(f)::QAB1(F),XP(g)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • P(g);::QAR1(F),XP(g)
      • Refutation
        • P(g);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • P(g);::QAR1(F),XP(g)
      • Refutation
        • P(i);
    • Try
      • Q(F);CHECK
      • Vars
        • P(g);::QAR1(F),XP(g)
      • Refutation
        • P(h);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • R(b);N_GUARD,XS(A)::QAR1(F)
        • R(b);N_GUARD::QAR1(F),XR(b)
        • S(d);S_CUTR(b)::QAR1(F)
        • S(d);S_CUTR(f)::QAB1(F),XP(g)
        • P(g);::QAR1(F),XP(g)
      • Refutation
        • P(i);XQ(F)
    • Try
      • Q(F);XP(i)
      • Threat
        • QAR1(F)
      • Vars
        • R(b);N_GUARD,XS(A)::QAR1(F)
        • R(b);N_GUARD::QAR1(F),XR(b)
        • S(d);S_CUTR(b)::QAR1(F)
        • S(d);S_CUTR(f)::QAR2(F)
        • P(g);::QAR1(F),XP(g)
      • Refutation
        • R(f);P_PINQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • R(b);N_GUARD,XS(A)::QAR2(F)
      • R(b);N_GUARD::R(D)+P(E)
      • S(d);S_CUTR(b)::QAR2(F)
      • S(d);S_CUTR(f)::QAR1(F)
      • P(g);::QAR1(F),XP(g)
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