MESON Chess Problem Database

Problem Display
PID: 157162 (6KN/7p/4P2k/4p3/4PnP1/7N/7R/2B5 w - - 0 1)

Haring, Jacobus

Probleemblad, 1946

6KN/7p/4P2k/4p3/4PnP1/7N/7R/2B5

#2

8 + 4

5454 Near Snap 2016
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5+?
      • 1...Sh3
        • 2.Sf3#
        • 2.Sxh3#
        • 2.Sgf7#
        • 2.Sxh7#
        • 2.Rxh3#
      • 1...Sh5
        • 2.Sf3#
        • 2.Sgf7#
        • 2.Sxh7#
        • 2.Rxh5#
      • 1...Kxg5!
    • 1.Ba3?
      • threat
        • 2.Bf8#
      • 1...Sxh3
        • 2.Bc1#
      • 1...Sh5
        • 2.g5#
      • 1...Sg6
        • 2.Sf7#
      • 1...Sxe6!
  • Keys
    • 1.Rd2!
      • 1...Sxh3
        • 2.Rh2#
      • 1...Sxe6
        • 2.Rd6#
      • 1...Se2
        • 2.Rxe2#
      • 1...Sg2
        • 2.Rxg2#
      • 1...Sd3
        • 2.Rxd3#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Sh5
        • 2.g5#
      • 1...Sg6
        • 2.Sf7#

Anticipated by 140100(1916), 58111(1928), 139043(1937), 140101(1938)

This anticipates 145956(1951), 227985(1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK,N_PINS(a)
      • Refutation
        • K(c);P_SPINS(a),S_FLIGHT,XS(C)
    • Try
      • B(A);N_PINS(a)
      • Threat
        • B(A)
      • Vars
        • S(a);OGATEB,P_SPINS(a),XS(C)::B(A)
        • S(a);SBLOCK::P(E)
        • S(a);SBLOCK::S(H)
      • Refutation
        • S(a);XP(F)
  • Actual
    • R(B);N_PINS(a)
    • Vars
      • S(a);OGATEB,XS(C)::B(A)+R(B)
      • S(a);OGATEB,XP(F)::B(A)+R(B)
      • S(a);OGATEB::B(A)+R(B),XS(a)
      • S(a);SBLOCK::P(E)
      • S(a);SBLOCK::S(H)
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