MESON Chess Problem Database

Problem Display
PID: 187928 (Q7/2pp3p/K3p3/1p6/BB6/3N4/k3PR1r/4Rb2 w - - 0 1)

van Dijk, Johannes

Source?, 1910

Q7/2pp3p/K3p3/1p6/BB6/3N4/k3PR1r/4Rb2

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.e3#
      • 2.e4#
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Bc2?
      • threat
        • 2.Kxb5#
        • 2.Kb7#
      • 1...Rh5
        • 2.Kb7#
      • 1...c6
        • 2.Kb6#
        • 2.Kb7#
      • 1...Bg2!
    • 1.Bc3?
      • threat
        • 2.Ra1#
      • 1...Ka3
        • 2.Ra1#
      • 1...bxa4!
    • 1.Qh8?
      • threat
        • 2.Ra1#
        • 2.Qa1#
        • 2.Qb2#
      • 1...bxa4
        • 2.Qb2#
      • 1...e5!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Bc2#
      • 1...Bg2+
        • 2.e4#
      • 1...bxa4
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD::QAB(H)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAR(H)+K(G)
      • Refutation
        • B(a);
    • Try
      • B(F);
      • Threat
        • R1(A)
      • Vars
        • K(b);P-FLIGHT::R(A)
      • Refutation
        • P(d);XB(E)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);XB(E)::QAR1(H)
      • Refutation
        • P(e);
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • QAR(H)+B(E)
    • Vars
      • B(a);CHECK,N_GUARD,S_CUTR(c)::R(C)+P(B)
      • P(d);OGATE,P_SPINP(d),XB(E)::QAR2(H),XP(d)
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