MESON Chess Problem Database

Problem Display
PID: 18463 (Q6B/2p1pN2/5PK1/2pr4/Rb2k3/1N1pqnPp/7P/4Rb1B w - - 0 1)

Retter, Yosef

Al Hamishmar, 1956

Q6B/2p1pN2/5PK1/2pr4/Rb2k3/1N1pqnPp/7P/4Rb1B

#2

11 + 11

274 diagrammes 1973
3841 The Art of Israeli Chess Composition 1983
721 Variantim 1988

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Sg5#
  • Tries
    • 1.Rxb4+?
      • 1...c4
        • 2.Rxc4#
      • 1...cxb4!
  • Keys
    • 1.fxe7!
      • threat
        • 2.Sd2#
        • 2.Sxc5#
        • 2.Sg5#
        • 2.e8Q#
        • 2.e8R#
      • 1...Qxe1
        • 2.e8Q#
        • 2.e8R#
      • 1...Qe2
        • 2.e8Q#
        • 2.e8R#
      • 1...d2
        • 2.Sxc5#
      • 1...Be2
        • 2.e8Q#
        • 2.e8R#
      • 1...Bg2
        • 2.Sxc5#
      • 1...c4
        • 2.Sg5#
      • 1...c6
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(k);SBLOCK::S(I)
  • Tries
    • Try
      • R(F);CHECK,XB(f)
      • Vars
        • P(h);P_SPINP(h)::R(F),XP(h)
      • Refutation
        • P(h);XR(F)
  • Actual
    • P(G);XP(k)
    • Threat
      • DUALS(5)
    • Vars
      • Q(c);N_SPINQ(c),XR(A)::P=Q
      • Q(c);::P=Q
      • P(b);::S(D),XP(h)
      • B(a);N_SPINQ(c)::P=Q
      • B(a);N_SPINS(d)::S(D),XP(h)
      • P(h);N_SPINB(f)::S(I)
      • P(j);N_SPINR(i)::S(D)
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