MESON Chess Problem Database

Problem Display
PID: 114203 (8/p1QP4/b5BR/1kPp3p/7r/bPP1p3/4Kn2/R3B3 w - - 0 1)

Stocchi, Ottavio

American Chess Bulletin, 1953

8/p1QP4/b5BR/1kPp3p/7r/bPP1p3/4Kn2/R3B3

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Ra5#
    • 1...Bb2
      • 2.Ra5#
    • 1...Bxc5
      • 2.Ra5#
    • 1...Sg4
      • 2.Bd3#
    • 1...d4
      • 2.c4#
  • Tries
    • 1.Qa5+?
      • 1...Kxa5+
        • 2.c4#
      • 1...Kc6+!
    • 1.Qc6+?
      • 1...Ka5+
        • 2.c4#
      • 1...Kxc6+!
  • Keys
    • 1.Qxa7!
      • threat
        • 2.Qb6#
      • 1...Ka5+
        • 2.c4#
      • 1...Kc6+
        • 2.Bd3#
      • 1...Bxc5
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(b);OGATE::R1(A)
    • B(b);OGATE,XP(F)::R1(A)
    • S(a);N_GUARD,S_CUTR(d)::B(G)
    • P(f);N_GUARD,S_CUTR(d)::P(E)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT,P_SPINB(b),XQ(I)::B(B)+P(E)
      • Refutation
        • K(e);CHECK,S_FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT,P_SPINB(b)::B(B)+P(E)
      • Refutation
        • K(e);CHECK,S_FLIGHT,XQ(I)
  • Actual
    • Q(I);XP(i)
    • Threat
      • QAR1(I)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINB(b)::B(B)+P(E)
      • K(e);CHECK,S_FLIGHT::R(H)+B(G)
      • B(b);SBLOCK,XP(F)::QAB1(I),XB(h)
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