MESON Chess Problem Database

Problem Display
PID: 187924 (5b2/3B1N2/1B1P1P2/1pNk4/pR1P2pK/5q1n/6Q1/3R4 w - - 0 1)

van Dijk, Johannes

Sydney Morning Herald, 1910

5b2/3B1N2/1B1P1P2/1pNk4/pR1P2pK/5q1n/6Q1/3R4

#2

11 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
      • 2.Qa2#
    • 1...g3
      • 2.Qxf3#
  • Tries
    • 1.Sxa4?
      • threat
        • 2.Sc3#
      • 1...Ke4
        • 2.d5#
      • 1...bxa4!
    • 1.Re1?
      • threat
        • 2.Re5#
      • 1...Qe4
        • 2.Qxe4#
        • 2.Qa2#
      • 1...Bxd6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc3#
      • 1...Qf2+
        • 2.Sxf2#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Kxe4
        • 2.d5#
      • 1...Qxe4
        • 2.Qa2#
      • 1...Qc3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::QAB(B),XQ(a)
  • Tries
    • Try
      • S(F);XP(c)
      • Threat
        • S(F)
      • Vars
        • K(f);OGATE,S_FLIGHT::R(C)+P(D)
      • Refutation
        • P(e);XS(F)
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Refutation
        • B(g);XP(H)
  • Actual
    • S(F);N_PINQ(a)
    • Threat
      • S(F)
    • Vars
      • Q(a);CHECK::QAB(B)+S(F),XQ(a)
      • Q(a);CHECK,XP(I)::QAB(B)+S(F),DCHECK,XQ(a)
      • K(f);OGATE,P_SPINQ(a),S_FLIGHT,XS(F)::R(C)+P(D)
      • Q(a);N_GUARD,P_SPINQ(a),SBLOCK,XS(F)::QAB(B)
      • Q(a);::QAB(B)+S(F),DCHECK,XQ(a)
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