MESON Chess Problem Database

Problem Display
PID: 67202 (2b2B2/2Np4/1p4N1/5p2/QppkppR1/bP2R3/1P1K1P2/7B w - - 0 1)

Stocchi, Ottavio

Israel Problemists' Association, 1954

2b2B2/2Np4/1p4N1/5p2/QppkppR1/bP2R3/1P1K1P2/7B

#2

11 + 10

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qxd7#
    • 1...c3+
      • 2.bxc3#
    • 1...fxe3+
      • 2.fxe3#
    • 1...fxg4
      • 2.Rxe4#
    • 1...b5
      • 2.Qa7#
    • 1...d5
      • 2.Sb5#
  • Tries
    • 1.Rd3+?
      • 1...exd3
        • 2.Sb5#
        • 2.Rxf4#
      • 1...cxd3!
    • 1.Qb5?
      • threat
        • 2.Bg7#
        • 2.Qxc4#
        • 2.Qd5#
        • 2.Qe5#
        • 2.Qxb6#
      • 1...fxe3+
        • 2.fxe3#
      • 1...cxb3
        • 2.Bg7#
        • 2.Qd5#
      • 1...Ba6
        • 2.Bg7#
        • 2.Qxd7#
        • 2.Qd5#
        • 2.Qe5#
        • 2.Qxb6#
      • 1...Bb7
        • 2.Bg7#
        • 2.Qxc4#
        • 2.Qe5#
        • 2.Qxb6#
      • 1...d5
        • 2.Bg7#
        • 2.Qxd5#
        • 2.Qxb6#
      • 1...d6
        • 2.Bg7#
        • 2.Qxc4#
        • 2.Qd5#
        • 2.Qxb6#
      • 1...c3+!
    • 1.Qxb4?
      • threat
        • 2.Bg7#
        • 2.Qc3#
        • 2.Qxc4#
      • 1...fxe3+
        • 2.fxe3#
      • 1...Bxb2
        • 2.Bg7#
        • 2.Qd6#
        • 2.Qxc4#
        • 2.Qxb6#
      • 1...Ba6
        • 2.Bg7#
        • 2.Qc3#
      • 1...b5
        • 2.Bc5#
        • 2.Bg7#
        • 2.Qc3#
      • 1...d5
        • 2.Sb5#
        • 2.Bg7#
        • 2.Qc3#
      • 1...d6
        • 2.Bg7#
        • 2.Qxc4#
      • 1...Bxb4+!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Rxc4#
      • 1...bxc3+
        • 2.bxc3#
      • 1...e3+
        • 2.fxe3#
      • 1...cxb3
        • 2.Bg7#
      • 1...Ba6
        • 2.Qxd7#
      • 1...b5
        • 2.Qa7#
      • 1...d5
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(j);N_GUARD::QAR(G),XP(i)
    • P(c);CHECK,OGATE,P_SPINP(b)::P(B),XP(c)
    • P(f);CHECK,OGATE,P_SPINP(e),XR(F)::P(D),XP(f)
    • P(g);N_GUARD,XR(H)::R1(F),XP(e)
    • P(h);OGATEB::QAB(G)
    • P(i);SBLOCK::S(J)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • P(c);P_SPINP(b),XR(F)
    • Try
      • Q(G);
      • Threat
        • DUALS(5)
      • Vars
        • P(f);CHECK,OGATE,P_SPINP(e),XR(F)::P(D),XP(f)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(G);P_PINP(c),XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(f);CHECK,OGATE,XR(F)::P(D),XP(f)
      • Refutation
        • B(a);CHECK,N_SPINP(c),XQ(G)
  • Actual
    • R(F);
    • Threat
      • R1(F),XP(c)
    • Vars
      • P(b);CHECK,OGATE,P_SPINP(c),XR(F)::P(B),XP(b)
      • P(e);CHECK,OGATE,P_SPINP(f)::P(D),XP(e)
      • P(c);P_SPINP(b),XP(E)::B(K)
      • B(j);N_GUARD::QAR(G),XP(i)
      • P(h);OGATEB::QAB(G)
      • P(i);SBLOCK::S(J)
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