MESON Chess Problem Database

Problem Display
PID: 87460 (B2n2q1/4p3/7Q/nR1pkPp1/3p2P1/r1N1pK2/2rNRP2/B1b5 w - - 0 1)

Candela Sanz, Rafael

Problemista, 1966

B2n2q1/4p3/7Q/nR1pkPp1/3p2P1/r1N1pK2/2rNRP2/B1b5

#2

11 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Rxd5#
    • 1...Qg7
      • 2.Rxd5#
    • 1...Qe8
      • 2.Rxd5#
    • 1...Qf8
      • 2.Rxd5#
    • 1...Qh8
      • 2.Rxd5#
    • 1...Sb3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sac6
      • 2.Sc4#
    • 1...Sab7
      • 2.Sc4#
    • 1...Se6
      • 2.Rxd5#
    • 1...Sf7
      • 2.Rxd5#
      • 2.Qe6#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Qh2#
      • 1...Qxd5+
        • 2.Rxd5#
      • 1...Qh7
        • 2.Sc3#
      • 1...Qh8
        • 2.Sc3#
      • 1...Se6!
  • Keys
    • 1.Sce4!
      • threat
        • 2.Qh2#
      • 1...exd2+
        • 2.Sc3#
      • 1...exf2+
        • 2.Sc3#
      • 1...Qh7
        • 2.Rxd5#
      • 1...Qh8
        • 2.Rxd5#
        • 2.Qxh8#
      • 1...Se6
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(l);N_GUARD::R1(H),XP(g)
    • Q(l);N_GUARD,P_PINP(I)::R1(H),XP(g)
    • S(f);N_GUARD::S(B)
    • S(f);N_GUARD::S(B),XS(f)
    • S(k);S_CUTQ(l)::R1(H),XP(g)
  • Tries
    • Try
      • S(E);XP(g)
      • Threat
        • QAB(J)
      • Vars
        • Q(l);CHECK,OGATE,P_SPINQ(l),XS(E)::R1(H),XQ(l)
        • Q(l);N_GUARD::R(H)+S(E)
      • Refutation
        • S(k);
  • Actual
    • S(E);N_PINP(d),P_PINP(e)
    • Threat
      • QAB(J)
    • Vars
      • P(d);CHECK,XS(B)::R(C)+S(E)
      • P(d);CHECK,XP(D)::R(C)+S(E)
      • Q(l);N_GUARD::R1(H),XP(g)
      • S(k);S_CUTQ(l)::R1(H),XP(g)
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