MESON Chess Problem Database

Problem Display
PID: 99655 (8/4Np2/R1q2PPK/1RBNkB2/r5p1/2P1p1P1/5n2/4Q3 w - - 0 1)

Salazar Lopez, Francisco

Magyar Sakkszovetseg, 1968

8/4Np2/R1q2PPK/1RBNkB2/r5p1/2P1p1P1/5n2/4Q3

#2

12 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Bd6#
    • 1...Qb7
      • 2.Bd6#
    • 1...Qa8
      • 2.Bd6#
    • 1...Qe8
      • 2.Bd6#
    • 1...Qd6
      • 2.Bxd6#
    • 1...Qc8
      • 2.Bd6#
    • 1...Rd4
      • 2.cxd4#
    • 1...Rf4
      • 2.gxf4#
  • Tries
    • 1.Bd4+?
      • 1...Kd6
        • 2.Sc8#
        • 2.Rxc6#
      • 1...Rxd4!
    • 1.Qxe3+?
      • 1...Se4
        • 2.Qf4#
      • 1...Re4!
  • Keys
    • 1.Bxe3!
      • threat
        • 2.Bf4#
      • 1...Kd6
        • 2.Bc5#
      • 1...Qxc3
        • 2.Sxc3#
      • 1...Rf4
        • 2.Bxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD,XR(D)::B(E)
    • Q(f);N_GUARD::B(E)
    • Q(f);N_GUARD::B(E),XQ(f)
    • R(c);OGATE::P(B),XR(c)
    • R(c);OGATE::P(C),XR(c)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • R(c);XB(E)
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • S(a);P_SPINS(a),S_CUTR(c)::QAB1(A)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • B(E);XP(b)
    • Threat
      • QAR(A)+B(E),DCHECK
    • Vars
      • K(e);P_SPINQ(f),S_FLIGHT::B(E)
      • Q(f);XP(B)::R(D)+S(F),XQ(f)
      • R(c);::QAR(A)+B(E),DCHECK,XR(c)
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