MESON Chess Problem Database

Problem Display
PID: 100954 (6bN/pp3pp1/8/1RK1k1BR/1p1p1p2/2bQ4/B5n1/7q w - - 0 1)

Fontana, Alessandro

Good Companions, 1920

6bN/pp3pp1/8/1RK1k1BR/1p1p1p2/2bQ4/B5n1/7q

#2

7 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Sxf7#
    • 1...b6+
      • 2.Kc6#
    • 1...f5
      • 2.Sg6#
    • 1...f6
      • 2.Sg6#
  • Tries
    • 1.Bh4+?
      • 1...f5
        • 2.Sg6#
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...g5!
    • 1.Rxb7?
      • threat
        • 2.Re7#
      • 1...f5
        • 2.Sg6#
      • 1...f6
        • 2.Sg6#
      • 1...Qh3!
    • 1.Qe2+?
      • 1...Kf5
        • 2.Kc4#
        • 2.Kd6#
      • 1...Se3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qd5#
      • 1...b6+
        • 2.Kc6#
      • 1...Kf5
        • 2.Kd6#
      • 1...Se1
        • 2.Qxf4#
      • 1...Se3
        • 2.Qxf4#
      • 1...Sh4
        • 2.Qxf4#
      • 1...f5
        • 2.Sg6#
      • 1...f6
        • 2.Bxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(l);N_GUARD::S(G),XP(j)
    • P(i);CHECK::R(C)+K(D)
    • P(j);N_GUARD::S(G)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • P(k);P_SPINP(k)
    • Try
      • R(C);XP(i)
      • Threat
        • R(C)
      • Vars
        • P(j);N_GUARD::S(G)
      • Refutation
        • Q(a);
    • Try
      • Q(B);CHECK
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • P(i);CHECK::R(C)+K(D)
      • K(g);P-FLIGHT,P_SPINP(f)::R(C)+K(D)
      • S(b);N_GUARD::QAB1(B),XP(f)
      • P(j);N_GUARD,SBLOCK::S(G)
      • P(j);SBLOCK::R(F)+B(E),DCHECK,XP(f)
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