MESON Chess Problem Database

Problem Display
PID: 110028 (1b4B1/3Rp3/2q1P2p/1ppNQ3/pBk2KN1/P3P3/PrP3p1/2R1rb2 w - - 0 1)

Castellari, Umberto

Il Littorale, 1929-1931

1b4B1/3Rp3/2q1P2p/1ppNQ3/pBk2KN1/P3P3/PrP3p1/2R1rb2

#2

13 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd7
      • 2.Sb6#
    • 1...Qa8
      • 2.Sb6#
    • 1...Qb6
      • 2.Sxb6#
    • 1...Qxe6
      • 2.Sb6#
    • 1...Qc8
      • 2.Sb6#
    • 1...Rxe3
      • 2.Sgxe3#
      • 2.Sdxe3#
    • 1...Bxe5+
      • 2.Sxe5#
    • 1...Ba7
      • 2.Qc3#
      • 2.Qe4#
  • Keys
    • 1.Ke4!
      • threat
        • 2.Qc3#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Rxe3+
        • 2.Sxe3#
      • 1...Bd3+
        • 2.cxd3#
      • 1...Qxe6
        • 2.Sb6#
      • 1...Rxc2
        • 2.Rxc2#
      • 1...Bxe5
        • 2.Sxe5#
      • 1...cxb4
        • 2.Qd4#
      • 1...Rb3
        • 2.cxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD,XR(L)::S(I)
    • Q(i);N_GUARD::S(I)
    • Q(i);N_GUARD::S(I),XQ(i)
    • Q(i);N_GUARD,XP(K)::S(I)
    • B(l);CHECK,XQ(J)::S(H),XB(l)
  • Actual
    • K(G);N_SPINQ(J),P-FLIGHT,P_SPINP(E),P_SPINS(I)
    • Threat
      • QAR1(J)
    • Vars
      • Q(i);CHECK,OGATE,XS(I)::QAB1(J),XQ(i)
      • R(a);CHECK,XP(E)::S(H),XR(a)
      • B(b);CHECK,OGATE::R(A)+P(C)DCHECK,XB(b)
      • Q(i);N_PINS(I),P_PINQ(J),XP(K)::S(I)
      • R(c);OGATE,P_SPINR(c),XP(C)::R(A),XR(c)
      • B(l);XQ(J)::S(H),XB(l)
      • P(h);N_GUARD,XB(F)::QAR1(J)
      • R(c);OGATE::R(A)+P(C)DCHECK,XR(c)
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