MESON Chess Problem Database

Problem Display
PID: 147240 (q1R5/1p6/1r1B4/2Ppp3/Q1pkn1p1/1P1B1Pn1/2KN1bN1/3R3r w - - 0 1)

Petite, Efren

Canadian Chess Chat, 1983

q1R5/1p6/1r1B4/2Ppp3/Q1pkn1p1/1P1B1Pn1/2KN1bN1/3R3r

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Sxb3#
    • 1...Sxc5
      • 2.Bxc5#
    • 1...gxf3
      • 2.Sxf3#
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Bxe5#
      • 1...Qxc8
        • 2.Sxb6#
      • 1...Rxd6
        • 2.Sa5#
      • 1...Sxd6
        • 2.Bf1#
      • 1...dxc4
        • 2.Qxc4#
      • 1...Qb8
        • 2.Sxb6#
      • 1...Rh5
        • 2.Bxe4#
      • 1...Rc6
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(j);XP(E)::S(C),XR(j)
    • S(f);OGATE,XP(I)::B(J),XS(f)
    • P(g);XP(G)::S(C),XP(g)
  • Actual
    • S(C);XP(d)
    • Threat
      • B(J),XP(i)
    • Vars
      • Q(l);N_GUARD,XR(K)::QAR(H)+S(C),XR(j)
      • R(j);N_GUARD,XB(J)::QAR(H)+S(C)
      • S(f);N_GUARD,XB(J)::R(A)+B(F)
      • P(h);OGATE,P_SPINP(h),XS(C)::QAR1(H),XP(h)
      • Q(l);N_GUARD::QAR(H)+S(C),XR(j)
      • R(a);N_GUARD::R(A)+B(F),XS(f)
      • R(j);N_GUARD::QAR(H)+S(C)
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