MESON Chess Problem Database

Problem Display
PID: 67425 (4r3/1p2p2p/3PpP1K/3Pk1p1/1NR1N1Q1/Br1p3B/1q6/2bn4 w - - 0 1)

Stocchi, Ottavio

1st Prize, Trybuna Robotnicza, 1954/II

4r3/1p2p2p/3PpP1K/3Pk1p1/1NR1N1Q1/Br1p3B/1q6/2bn4

#2

10 + 12

5407 Selected Stocchi (II) 2004
1101 BCSC Final 2006-2007
56 The Problemist 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Qxe6#
    • 1...Se3
      • 2.Qg3#
    • 1...d2
      • 2.Qxg5#
    • 1...exd5
      • 2.Qf5#
  • Tries
    • 1.Sxd3+?
      • 1...Kxd5
        • 2.Qxe6#
      • 1...Rxd3!
    • 1.Sc6+?
      • 1...Kxd5
        • 2.Rc5#
        • 2.Qxe6#
      • 1...bxc6!
    • 1.Sd2?
      • threat
        • 2.Qxe6#
      • 1...Kxd6
        • 2.Qxe6#
      • 1...Kxf6
        • 2.Qxe6#
      • 1...exd5
        • 2.Qe6#
      • 1...exd6
        • 2.Qxg5#
      • 1...exf6
        • 2.Qg3#
      • 1...Qd4!
    • 1.dxe6?
      • threat
        • 2.Qf5#
      • 1...Se3
        • 2.Qg3#
      • 1...Qf2!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qxe6#
      • 1...Kxd6
        • 2.Qxe6#
      • 1...Kxf6
        • 2.Qxe6#
      • 1...exd5
        • 2.Qe6#
      • 1...exd6
        • 2.Qd4#
      • 1...exf6
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(a);SBLOCK::QAR1(F),XP(h)
    • S(b);S_CUTB(a)::QAB(F)
    • P(e);S_CUTB(a)::QAR2(F),XP(g)
    • P(h);N_GUARD,XP(G)::QAR1(F)
  • Tries
    • Try
      • S(C);CHECK,XP(e)
      • Vars
        • K(f);P-FLIGHT,XP(G)::QAB1(F),XP(h)
      • Refutation
        • R(d);XS(C)
    • Try
      • S(C);CHECK
      • Refutation
        • P(i);XS(C)
    • Try
      • S(E);
      • Threat
        • QAR1(F),XP(h)
      • Vars
        • K(f);S_FLIGHT,XP(H)::QAR1(F),XP(h)
        • K(f);S_FLIGHT,XP(I)::QAR1(F),XP(h)
        • P(h);XP(G)::QAR1(F)
        • P(j);SBLOCK,XP(H)::QAR2(F),XP(g)
        • P(j);SBLOCK,XP(I)::QAB(F)
      • Refutation
        • Q(c);
    • Try
      • P(G);XP(h)
      • Threat
        • QAR1(F)
      • Vars
        • S(b);S_CUTB(a)::QAB(F)
      • Refutation
        • Q(c);
  • Actual
    • S(E);
    • Threat
      • QAR1(F),XP(h)
    • Vars
      • K(f);S_FLIGHT,XP(H)::QAR1(F),XP(h)
      • K(f);S_FLIGHT,XP(I)::QAR1(F),XP(h)
      • P(h);XP(G)::QAR1(F)
      • P(j);SBLOCK,XP(H)::QAB1(F)
      • P(j);SBLOCK,XP(I)::S(C),XP(e)
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