MESON Chess Problem Database

Problem Display
PID: 193559 (8/Q2b4/1rpr3N/1p6/1P1k1Np1/3P2K1/p2BP3/8 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1915

8/Q2b4/1rpr3N/1p6/1P1k1Np1/3P2K1/p2BP3/8

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Qg7#
    • 1...a1Q
      • 2.Qxa1#
    • 1...a1S
      • 2.Qxa1#
    • 1...a1B
      • 2.Qxa1#
    • 1...a1R
      • 2.Qxa1#
  • Tries
    • 1.Qxb6+?
      • 1...c5
        • 2.Qxc5#
        • 2.Qxd6#
      • 1...Ke5!
    • 1.Qxa2?
      • threat
        • 2.Qa1#
        • 2.Qb2#
      • 1...Ra6
        • 2.Qb2#
      • 1...Ke5!
    • 1.Qa3?
      • threat
        • 2.Qb2#
        • 2.Qc3#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...Ke5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxd6#
      • 1...Ke5
        • 2.Bc3#
      • 1...Rxh6
        • 2.e3#
      • 1...Re6
        • 2.Sf5#
      • 1...Rd5
        • 2.e3#
      • 1...Rf6
        • 2.e3#
      • 1...Rg6
        • 2.e3#
      • 1...Be6
        • 2.Qg7#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • B(h);OGATE::QAB(H)
    • P(a);OGATE::QAB(H),XQ(a)
    • P(a);OGATE::QAB(H),XS(a)
    • P(a);OGATE::QAB(H),XB(a)
    • P(a);OGATE::QAB(H),XR(a)
  • Tries
    • Try
      • Q(H);CHECK,XR(e)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);N_PINR(e),XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);::QAB(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);N_PINR(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATE::QAB(H),XQ(a)
        • P(a);OGATE::QAB(H),XB(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(H);N_PINR(e)
    • Threat
      • QAR2(H),XR(g)
    • Vars
      • K(b);P_SPINR(g),S_FLIGHT::B(A)
      • R(g);XS(G)::P(B)
      • R(g);S_CUTB(h)::S(G)
      • R(g);::P(B)
      • B(h);OGATE::QAB(H)
      • P(f);OGATE::QAB1(H),XP(f)
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