MESON Chess Problem Database

Problem Display
PID: 54020 (Q1K5/3PNBp1/1Pp3R1/1pq1P3/1N1PkP2/2p1Pp2/5P1b/6r1 w - - 0 1)

Apro, Laszlo

Schach-Echo, 1933

Q1K5/3PNBp1/1Pp3R1/1pq1P3/1N1PkP2/2p1Pp2/5P1b/6r1

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg6
      • 2.Bxg6#
  • Tries
    • 1.Qxc6+?
      • 1...Qd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Qxc6+!
  • Keys
    • 1.Rxc6!
      • threat
        • 2.Rxc5#
      • 1...Qxc6+
        • 2.Qxc6#
      • 1...Qxb4
        • 2.Rxc3#
      • 1...Qxd4
        • 2.Rc4#
      • 1...Qxb6
        • 2.Bd5#
        • 2.Rxb6#
      • 1...Qxe7
        • 2.Rf6#
      • 1...Qxe5
        • 2.Re6#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qc4
        • 2.Rxc4#
      • 1...Qd5
        • 2.Bxd5#
      • 1...Ra1
        • 2.Bg6#
      • 1...Rg6
        • 2.Bxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XR(H)::B(K),XR(a)
  • Tries
    • Try
      • Q(L);CHECK,P_SPINQ(L),XP(h)
      • Refutation
        • Q(g);CHECK,XQ(L)
  • Actual
    • R(H);P_SPINR(H),XP(h)
    • Threat
      • QAB(L)+R(H),XQ(g)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XR(H)::QAB(L),XQ(g)
      • Q(g);N_PINR(H),XS(C)::QAB(L)+R(H),XP(c)
      • Q(g);N_PINR(H),XP(D)::QAB(L)+R(H)
      • Q(g);N_PINR(H),XS(J)::QAB(L)+R(H)
      • Q(g);N_PINR(H),XP(F)::QAB(L)+R(H)
      • Q(g);N_PINR(H)::QAB(L)+R(H),XQ(g)
      • Q(g);::QAB(L)+R(H),XQ(g)
      • Q(g);N_GUARD,N_PINR(H)::B(K),XQ(g)
      • R(a);N_GUARD::B(K)
      • R(a);N_GUARD::B(K),XR(a)
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Developed and maintained by Brian Stephenson.
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