MESON Chess Problem Database

Problem Display
PID: 139619 (4R2B/p1qQNK1p/2ppPP2/1r2k3/bp4P1/3R1BP1/2prp3/4N1n1 w - - 0 1)

Petite, Efren

L'Italia Scacchistica, 2001

4R2B/p1qQNK1p/2ppPP2/1r2k3/bp4P1/3R1BP1/2prp3/4N1n1

#2

12 + 13

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Sxc6#
      • 2.Qxd6#
    • 1...Qb6
      • 2.Qxd6#
    • 1...Qb8
      • 2.Sxc6#
    • 1...Qd8
      • 2.Sxc6#
    • 1...Qb7
      • 2.Qxd6#
    • 1...Qc8
      • 2.Qxd6#
    • 1...d5
      • 2.Qxc7#
    • 1...h5
      • 2.Sg6#
    • 1...h6
      • 2.Sg6#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Re3#
      • 1...Qxd7+
        • 2.exd7#
      • 1...Rxd3
        • 2.Sxd3#
      • 1...Qb6
        • 2.Qxd6#
      • 1...Sxf3!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qe4#
      • 1...Qxe7+
        • 2.fxe7#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...Qb7
        • 2.Qxd6#
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(l);N_GUARD::QAB1(H),XP(j)
    • Q(l);N_GUARD::S(I),XP(i)
    • P(j);OGATEB::QAB(H),XQ(l)
    • P(m);N_GUARD::S(I)
  • Tries
    • Try
      • S(I);P_SPINQ(H)
      • Threat
        • R(B)
      • Vars
        • Q(l);CHECK,OGATE,XQ(H)::R(K)+P(F),XQ(l)
        • R(c);XR(B)::S(A),XR(c)
        • Q(l);N_PINQ(H)::QAB1(H),XP(j)
      • Refutation
        • S(a);XB(C)
  • Actual
    • Q(H);P_SPINS(I),XP(i)
    • Threat
      • QAR1(H)
    • Vars
      • Q(l);CHECK,OGATE,XS(I)::B(L)+P(G),XQ(l)
      • Q(l);N_PINS(I),XQ(H)::S(I),XQ(l)
      • S(a);XB(C)::S(A),XS(a)
      • Q(l);N_GUARD::QAB1(H),XP(j)
      • R(g);N_GUARD::QAR1(H),XR(g)
      • P(j);OGATEB::QAB(H),XQ(l)
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