MESON Chess Problem Database

Problem Display
PID: 227592 (q4b1R/2B5/1np1p3/k7/PN5Q/p2P4/3NK3/3B4 w - - 0 1)

van Dijk, Johannes

Algemeen Handelsblad, 1926

q4b1R/2B5/1np1p3/k7/PN5Q/p2P4/3NK3/3B4

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Sxc6#
    • 1...Bxb4
      • 2.Rxa8#
    • 1...Bc5
      • 2.Rxa8#
    • 1...Bd6
      • 2.Rxa8#
    • 1...Bh6
      • 2.Rxa8#
    • 1...Be7
      • 2.Rxa8#
    • 1...Bg7
      • 2.Rxa8#
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sc4#
      • 1...Kxb4
        • 2.Se4#
      • 1...Bxb4
        • 2.Rxa8#
      • 1...Qa6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD,P_PINP(D),SBLOCK::S(F),XP(d)
    • B(g);OGATE,XS(F)::R(I),XQ(f)
    • B(g);OGATE::R(I),XQ(f)
  • Actual
    • Q(G);
    • Threat
      • S(B)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT,XS(F)::QAB(G)+S(B)
      • B(g);OGATE,SBLOCK,XS(F)::R(I),XQ(f)
      • Q(f);N_GUARD,P_PINP(D),SBLOCK::S(F),XP(d)
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