MESON Chess Problem Database

Problem Display
PID: 101416 (3RB3/8/3p4/3p4/P1N1N3/P2k4/5Q2/K7 w - - 0 1)

Pape, Edouard

Good Companions (March), 1921

3RB3/8/3p4/3p4/P1N1N3/P2k4/5Q2/K7

#2

8 + 3

3391 Het Half Pin Thema 1924
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Bg6#
  • Tries
    • 1.Rxd6?
      • 1...Kxe4
        • 2.Bg6#
      • 1...d4
        • 2.Rxd4#
      • 1...Kxc4!
    • 1.Qe3+?
      • 1...Kxc4
        • 2.Sd2#
        • 2.Sxd6#
        • 2.Bb5#
        • 2.Rc8#
        • 2.Qc3#
      • 1...Kc2!
    • 1.Qd2+?
      • 1...Kxc4
        • 2.Qc3#
      • 1...Kxe4!
  • Keys
    • 1.Kb2!
      • 1...Kxc4
        • 2.Bb5#
      • 1...Kxe4
        • 2.Bg6#
      • 1...dxc4
        • 2.Sc5#
      • 1...dxe4
        • 2.Se5#
      • 1...d4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XS(F)::B(H)
  • Tries
    • Try
      • R(G);P_PINP(b),XP(c)
      • Vars
        • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(F)::B(H)
        • P(b);OGATE::R1(G),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XS(E)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(E)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(E)::B(H)
      • K(a);OGATEB,S_FLIGHT,XS(F)::B(H)
      • P(b);P_SPINP(c),SBLOCK,XS(E)::S(F)
      • P(b);P_SPINP(c),SBLOCK,XS(F)::S(E)
      • P(b);SBLOCK::QAB1(B)
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