MESON Chess Problem Database

Problem Display
PID: 21254 (1q1r1b2/3P1Rp1/Q1N1k2n/2Pp2PP/5p2/8/1p6/1K6 w - - 0 1)

Tolosa y Carreras, Jose

Problemas de Ajedrez, 1917

1q1r1b2/3P1Rp1/Q1N1k2n/2Pp2PP/5p2/8/1p6/1K6

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sxd8#
    • 1...d4
      • 2.Qc4#
  • Tries
    • 1.Sd4+?
      • 1...Kxf7
        • 2.Qe6#
      • 1...Ke5!
    • 1.Qe2+?
      • 1...Qe5
        • 2.Sxd8#
      • 1...Kxf7!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qg6#
      • 1...Kxf7
        • 2.Qxd5#
      • 1...Sxf7
        • 2.Qh3#
      • 1...Be7
        • 2.Rxe7#
      • 1...d4
        • 2.Qc4#
      • 1...Qe5
        • 2.Sxd8#
      • 1...Sg4
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sg8
        • 2.Qf5#
      • 1...g6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(g);SBLOCK::QAR(E)+S(F),DCHECK,XR(h)
    • P(c);OGATEB::QAB(E)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(H)::QAB1(E)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(F),XR(h)
      • Refutation
        • K(d);S_FLIGHT,XR(H)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(d);S_FLIGHT,XR(H)::QAB(E),XP(c)
      • S(e);N_GUARD,SBLOCK,XR(H)::QAB(E)
      • B(i);N_GUARD::R1(H),XB(i)
      • P(c);OGATEB::QAB(E)
      • Q(g);N_GUARD,SBLOCK::S(F),XR(h)
      • S(e);N_GUARD::QAB1(E)
      • S(e);N_GUARD::QAB1(E),XS(e)
      • P(f);::QAR2(E),XP(f)
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