MESON Chess Problem Database

Problem Display
PID: 238926 (5n1N/3p4/3R2pn/2P1k3/5R2/p1PB2P1/qN1P4/1b4K1 w - - 0 1)

Petite, Efren

4th HM., L'Italia Scacchistica, 1979

5n1N/3p4/3R2pn/2P1k3/5R2/p1PB2P1/qN1P4/1b4K1

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qa1
      • 2.Sc4#
    • 1...Bxd3
      • 2.Sxd3#
    • 1...Sf5
      • 2.Re4#
    • 1...Se6
      • 2.Sxg6#
    • 1...Sh7
      • 2.Sxg6#
  • Tries
    • 1.Bc2?
      • threat
        • 2.Sd3#
        • 2.d4#
      • 1...Qxb2
        • 2.d4#
      • 1...Bxc2
        • 2.d4#
      • 1...axb2
        • 2.d4#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Sf5
        • 2.Sd3#
        • 2.Re4#
      • 1...Se6
        • 2.Sd3#
        • 2.Sxg6#
      • 1...Qd5!
  • Keys
    • 1.Bc4!
      • threat
        • 2.d4#
      • 1...Qxc4
        • 2.Sxc4#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Sf5
        • 2.Sf7#
      • 1...Se6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD::S(B),XQ(b)
    • Q(b);N_GUARD::S(B)
    • B(a);XB(E)::S(B),XB(a)
    • S(f);SBLOCK::R1(G)
    • S(h);N_GUARD::S(J),XP(e)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XS(B)::P(C)
        • B(a);XB(E)::P(C)
        • P(c);XS(B)::P(C)
        • Q(b);N_GUARD::S(B),XQ(b)
      • Refutation
        • Q(b);
  • Actual
    • B(E);
    • Threat
      • P(C)
    • Vars
      • Q(b);XB(E)::S(B),XQ(b)
      • B(a);N_GUARD::S(B),XB(a)
      • S(f);N_GUARD::S(J)
      • S(h);SBLOCK::R1(I)
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