MESON Chess Problem Database

Problem Display
PID: 96916 (1n2Q3/8/2pPPPP1/R2bk3/1Bp1N1K1/2P2p2/2B2P2/8 w - - 0 1)

Zabala Apraiz, Miguel

Problemas, 1971

1n2Q3/8/2pPPPP1/R2bk3/1Bp1N1K1/2P2p2/2B2P2/8

#2

12 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd7
      • 2.exd7#
  • Tries
    • 1.Rc5?
      • 1...Sd7
        • 2.exd7#
      • 1...Sa6!
    • 1.Qxc6?
      • threat
        • 2.Qxd5#
      • 1...Kxe6
        • 2.Qe8#
      • 1...Sxc6!
    • 1.Qxb8?
      • 1...Kxe6
        • 2.Qe8#
      • 1...c5!
  • Keys
    • 1.Sc5!
      • 1...Bxe6+
        • 2.Qxe6#
      • 1...Kxd6
        • 2.Qxb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Be4
        • 2.Sd7#
      • 1...Sa6
        • 2.Sd7#
      • 1...Sd7
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE::QAR(L)+P(I),XS(f)
  • Tries
    • Try
      • R(G);
      • Vars
        • S(f);OGATE::QAR(L)+P(I),XS(f)
      • Refutation
        • S(f);
    • Try
      • Q(L);XP(e)
      • Threat
        • QAR1(L),XB(c)
      • Vars
        • K(d);N_SPINB(c),OGATEB,P-FLIGHT,XP(I)::QAR2(L)
      • Refutation
        • S(f);XQ(L)
    • Try
      • Q(L);XS(f)
      • Vars
        • K(d);N_SPINB(c),OGATEB,P-FLIGHT,XP(I)::QAR2(L)
      • Refutation
        • P(e);N_SPINB(c)
  • Actual
    • S(E);N_PINB(c)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XP(I)::QAR1(L),XB(c)
      • K(d);OGATEB,S_FLIGHT,XP(H)::QAB(L),XS(f)
      • K(d);OGATEB,S_FLIGHT,XP(J)::QAB(L)
      • B(c);::R(G)+S(E),DCHECK
      • S(f);N_GUARD::S(E)
      • S(f);N_GUARD::S(E),XS(f)
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