MESON Chess Problem Database

Problem Display
PID: 206277 (8/3p4/Q4P2/3P1kpP/1r1pppN1/4PB2/1B6/3K4 w - - 0 1)

Gross, Otto

L'Alfiere di Re, 1925

8/3p4/Q4P2/3P1kpP/1r1pppN1/4PB2/1B6/3K4

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...dxe3
      • 2.Sh6#
    • 1...d3
      • 2.Sh6#
    • 1...d6
      • 2.Qc8#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Sh6#
        • 2.Qe5#
        • 2.Qxd7#
      • 1...fxe3
        • 2.Sh6#
        • 2.Qe5#
      • 1...Rb6
        • 2.Sh6#
        • 2.Qe5#
      • 1...Rb7
        • 2.Sh6#
        • 2.Qe5#
      • 1...exf3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxe4#
      • 1...dxe3
        • 2.Sh6#
      • 1...exd3
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(b);XP(C)::S(E)
    • P(b);::S(E)
    • P(g);OGATEB::QAB(H)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Refutation
        • P(c);XB(D)
  • Actual
    • Q(H);P_PINP(c)
    • Threat
      • QAB1(H),XP(c)
    • Vars
      • P(b);XP(C)::S(E)
      • P(c);N_SPINP(c),OGATE,XQ(H)::P(C)
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