MESON Chess Problem Database

Problem Display
PID: 184824 (6B1/1bp5/p3Q3/3P4/3kNP2/5K2/8/4N3 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1908

6B1/1bp5/p3Q3/3P4/3kNP2/5K2/8/4N3

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qxd5#
  • Tries
    • 1.Qxa6?
      • threat
        • 2.Sc2#
        • 2.Qd3#
        • 2.Qa4#
      • 1...Bxd5
        • 2.Sc2#
        • 2.Qd3#
      • 1...Bc6
        • 2.Sc2#
        • 2.Qd3#
      • 1...c5
        • 2.Sc2#
        • 2.Qd3#
      • 1...Bxa6!
    • 1.Qe7?
      • threat
        • 2.Qb4#
        • 2.Qc5#
      • 1...Bxd5
        • 2.Qc5#
      • 1...a5
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Kc4!
    • 1.d6?
      • threat
        • 2.Qc4#
        • 2.Qe5#
        • 2.Qf6#
      • 1...cxd6
        • 2.Qc4#
        • 2.Qf6#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bxe4+!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qa4#
      • 1...Kc4
        • 2.Qa4#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Bc6
        • 2.dxc6#
      • 1...c5
        • 2.dxc5 ep#
      • 1...c6
        • 2.dxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);OGATE,P_PINS(C),XP(E)::QAR1(F),XB(c)
  • Tries
    • Try
      • Q(F);XP(b)
      • Threat
        • DUALS(3)
      • Refutation
        • B(c);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);P_PINS(C),XP(E)::QAB1(F)
        • P(b);::QAB1(F)
        • P(d);::QAB1(F),XP(d)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(E);P_SPINS(C)
      • Threat
        • DUALS(3)
      • Vars
        • B(c);N_GUARD::QAR1(F),XB(c)
      • Refutation
        • B(c);CHECK,XS(C)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • K(a);P-FLIGHT::QAR2(F)
      • B(c);OGATE,P_PINS(C),P_SPINB(c),XP(E)::QAR1(F),XB(c)
      • B(c);OGATE::QAR(F)+P(E),XB(c)
      • P(d);OGATE::QAR(F)+P(E),XP(d),EP
      • P(d);OGATE::QAR(F)+P(E),XP(d)
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