MESON Chess Problem Database

Problem Display
PID: 114190 (N3n3/2n5/1p2p3/p1k1p3/R3B3/4P3/P2Q4/qRN1K3 w - - 0 1)

Stocchi, Ottavio

Schaakclub Unitas (Groningen), 1950

N3n3/2n5/1p2p3/p1k1p3/R3B3/4P3/P2Q4/qRN1K3

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Sb3#
    • 1...Sd6
      • 2.Sd3#
    • 1...b5
      • 2.Sb3#
  • Tries
    • 1.Rxa5+?
      • 1...Kc4
        • 2.Sxb6#
        • 2.Bd3#
        • 2.Rb4#
        • 2.Qb4#
        • 2.Qd3#
      • 1...Sb5
        • 2.Qb4#
      • 1...b5
        • 2.Qb4#
      • 1...bxa5!
    • 1.Qd6+?
      • 1...Sxd6
        • 2.Sd3#
      • 1...Kxd6!
    • 1.Qd7?
      • threat
        • 2.Sb3#
        • 2.Sd3#
        • 2.Qc6#
      • 1...Qxb1
        • 2.Qc6#
      • 1...Qxa2
        • 2.Sd3#
        • 2.Qc6#
      • 1...Qb2
        • 2.Sd3#
        • 2.Qc6#
      • 1...Qd4
        • 2.Sb3#
        • 2.Qc6#
      • 1...Sd5
        • 2.Sb3#
        • 2.Sd3#
        • 2.Rb5#
      • 1...Qc3+!
  • Keys
    • 1.Rxb6!
      • 1...Qxc1+
        • 2.Qxc1#
      • 1...Qxa2
        • 2.Sd3#
      • 1...Sxa8
        • 2.Qxa5#
      • 1...Qb2
        • 2.Sd3#
      • 1...Qc3
        • 2.Qxc3#
      • 1...Qd4
        • 2.Sb3#
      • 1...Qb1
        • 2.Qc3#
      • 1...Sb5
        • 2.Rc6#
      • 1...Sd5
        • 2.Qxa5#
      • 1...Sa6
        • 2.Qxa5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sf6
        • 2.Qd6#
      • 1...Sg7
        • 2.Qd6#

This is a version of 63887

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • S(g);SBLOCK::S(B)
    • S(h);SBLOCK::S(B)
    • P(e);SBLOCK::S(B)
  • Tries
    • Try
      • R(G);CHECK,XP(b)
      • Vars
        • S(g);P_SPINS(g)::QAB1(E)
        • P(e);P_SPINP(e)::QAB1(E)
      • Refutation
        • P(e);XR(G)
    • Try
      • Q(E);CHECK
      • Vars
        • S(h);SBLOCK,XQ(E)::S(B)
      • Refutation
        • K(c);S_FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);P_PINS(B),XR(A)::QAR1(E)
      • Refutation
        • Q(a);CHECK
  • Actual
    • R(A);P_SPINS(B),XP(e)
    • Vars
      • Q(a);CHECK,OGATE,XS(B)::QAR(E),XQ(a)
      • Q(a);N_PINS(B),XP(D)::S(B)
      • S(g);N_GUARD,XS(I)::QAR2(E),XP(b)
      • Q(a);N_PINS(B)::S(B)
      • Q(a);N_GUARD,N_PINS(B),P_PINQ(E)::QAR2(E),XQ(a)
      • Q(a);N_GUARD::QAR2(E)
      • S(g);SBLOCK::R1(A)
      • S(g);N_GUARD::QAR2(E),XP(b)
      • S(h);N_GUARD::QAB1(E),XS(h)
      • S(h);N_GUARD::QAB1(E)
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