MESON Chess Problem Database

Problem Display
PID: 177542 (8/1pp5/b1P5/1nk1p2R/Q1Np1N2/2p5/2P5/1R3KB1 w - - 0 1)

Haring, Jacobus

Postsjakk, 1960

8/1pp5/b1P5/1nk1p2R/Q1Np1N2/2p5/2P5/1R3KB1

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Rxe5#
    • 1...Sd6
      • 2.Rxe5#
    • 1...Sa7
      • 2.Rxe5#
    • 1...bxc6
      • 2.Rxe5#
      • 2.Qb4#
  • Tries
    • 1.cxb7?
      • 1...Bxb7
        • 2.Qxb5#
      • 1...Sa3
        • 2.Rxe5#
      • 1...Sd6
        • 2.Rxe5#
      • 1...Sa7
        • 2.Rxe5#
      • 1...c6
        • 2.Rxe5#
        • 2.Qb4#
      • 1...Kc6!
  • Keys
    • 1.Sxe5!
      • 1...Sa3+
        • 2.Sc4#
      • 1...Sd6+
        • 2.Sed3#
      • 1...Sa7+
        • 2.Sc4#
      • 1...Kb6
        • 2.Bxd4#
      • 1...Kd6
        • 2.Qb4#
      • 1...bxc6
        • 2.Sc4#
      • 1...b6
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);P_PINS(F)::R(H),XP(e)
  • Tries
    • Try
      • P(I);XP(g)
      • Vars
        • B(f);N_GUARD,XP(I)::QAR1(E),XS(c)
        • S(c);P_PINS(F)::R(H),XP(e)
      • Refutation
        • K(d);N_SPINP(b),P-FLIGHT,P_SPINS(c)
  • Actual
    • S(F);XP(e)
    • Vars
      • S(c);CHECK::R(H)+S(F)
      • S(c);CHECK,SBLOCK::R(H)+S(F),DCHECK
      • K(d);P_SPINS(c),S_FLIGHT::B(C),XP(b)
      • K(d);N_SPINP(b),S_FLIGHT::QAB(E)
      • P(g);SBLOCK,XP(I)::R(H)+S(F)
      • P(g);SBLOCK::QAB1(E)
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