MESON Chess Problem Database

Problem Display
PID: 9545 (4B3/4P3/2Np4/P4Q1K/2k5/1pB2P2/1p2pP1b/1N1r4 w - - 0 1)

van Dijk, Johannes

2nd Prize, Ystad Allehanda, 1905

4B3/4P3/2Np4/P4Q1K/2k5/1pB2P2/1p2pP1b/1N1r4

#2

10 + 7

119 Tidskrift for Schack 1909

SOLUTION

  • SOUND
  • Tries
    • 1.Sb4?
      • threat
        • 2.Bb5#
        • 2.Qc8#
        • 2.Qb5#
      • 1...Rxb1
        • 2.Qc8#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Be5
        • 2.Qc8#
      • 1...d5!
    • 1.Bf7+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Sb4#
      • 1...Rd5+
        • 2.Se5#
      • 1...Kd3
        • 2.Sb4#
      • 1...Kb5
        • 2.Sd4#
        • 2.Se5#
        • 2.Sa7#
        • 2.Sb8#
        • 2.Sd8#
      • 1...Kc5
        • 2.Sb4#
      • 1...Kd5
        • 2.Sb4#
      • 1...d5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(3)
      • Vars
        • R(a);XS(A)::QAR(F)
        • R(a);N_GUARD,P_PINQ(F)::QAB1(F),XR(a)
        • B(d);::QAR(F)
      • Refutation
        • P(g);
    • Try
      • B(J);CHECK
      • Vars
        • R(a);N_GUARD,P_PINQ(F),P_SPINR(a)::QAB1(F),XR(a)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(H)
    • Vars
      • R(a);CHECK,SBLOCK::QAR(F)+S(H),DCHECK
      • K(f);S_FLIGHT::S(H)
      • K(f);P-FLIGHT::QAR(F)+S(H)
      • P(g);SBLOCK::QAR(F)+S(H),DCHECK
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