MESON Chess Problem Database

Problem Display
PID: 182294 (4Q3/p2K4/pRP5/kn2B3/1R6/pP6/P2P4/8 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1906

4Q3/p2K4/pRP5/kn2B3/1R6/pP6/P2P4/8

#2

9 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...axb6
      • 2.Ra4#
  • Tries
    • 1.Rb7?
      • threat
        • 2.Ra4#
      • 1...Sc3
        • 2.Bc7#
        • 2.Qd8#
      • 1...Kxb4!
    • 1.Rb8?
      • threat
        • 2.Ra4#
      • 1...Sc3
        • 2.Bc7#
        • 2.Qd8#
      • 1...Kxb4!
  • Keys
    • 1.Qh5!
      • 1...Kxb4
        • 2.Bc3#
      • 1...Kxb6
        • 2.Bc7#
      • 1...axb6
        • 2.Ra4#
      • 1...Sc3
        • 2.Bxc3#
      • 1...Sd4
        • 2.Bxd4#
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sc7
        • 2.Bxc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK,XR(F)::R1(D)
  • Tries
    • Try
      • R(F);
      • Threat
        • R1(D)
      • Refutation
        • K(b);P_SPINS(c),S_FLIGHT,XR(D)
    • Try
      • R(F);
      • Threat
        • R1(D)
      • Refutation
        • K(b);P_SPINS(c),S_FLIGHT,XR(D)
  • Actual
    • Q(I);
    • Vars
      • K(b);OGATEB,P_SPINS(c),S_FLIGHT,XR(D)::B(E)
      • K(b);OGATEB,P_SPINS(c),S_FLIGHT,XR(F)::B(E)
      • P(e);SBLOCK,XR(F)::R1(D)
      • S(c);OGATEB::QAR(I)+B(E),XS(c)
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