MESON Chess Problem Database

Problem Display
PID: 118780 (QN3N2/p1p5/1k5r/1Pr5/bP6/R1R5/8/K5b1 w - - 0 1)

Swane, Jan Arnold Willem

Arbejder-Skak, 1950

QN3N2/p1p5/1k5r/1Pr5/bP6/R1R5/8/K5b1

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Sfd7#
    • 1...Bxb5
      • 2.Qxa7#
    • 1...a5
      • 2.Qa6#
    • 1...a6
      • 2.Qxa6#
  • Tries
    • 1.Qxa7+?
      • 1...Kxb5
        • 2.Qa5#
      • 1...Kxa7!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qb8#
      • 1...Kxb5
        • 2.Qb7#
      • 1...Rxb5
        • 2.Qxa7#
      • 1...Bxb5
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(c);SBLOCK,XP(E)::S(H)
    • B(b);SBLOCK,XP(E)::QAB1(F),XP(f)
    • P(f);OGATE::QAR1(F)
    • P(f);OGATE::QAR1(F),XP(f)
  • Tries
    • Try
      • Q(F);CHECK,XP(f)
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAR1(F)
      • Refutation
        • K(d);P_SPINB(b),S_FLIGHT,XQ(F)
  • Actual
    • S(G);
    • Threat
      • QAR2(F)
    • Vars
      • K(d);P-FLIGHT,XP(E)::QAR2(F)
      • R(c);SBLOCK,XP(E)::QAB1(F),XP(f)
      • B(b);SBLOCK,XP(E)::S(H)
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