MESON Chess Problem Database

Problem Display
PID: 189767 (r7/3B4/8/kP6/N7/Q7/n1NK4/8 w - - 0 1)

van Dijk, Johannes

De Schaakcourant, 1912

r7/3B4/8/kP6/N7/Q7/n1NK4/8

#2

6 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qb4#
    • 1...Sc3
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
  • Tries
    • 1.Qd6?
      • 1...Kxa4
        • 2.Qa3#
      • 1...Ra6
        • 2.Qxa6#
      • 1...Rb8
        • 2.Qa6#
      • 1...Rc8
        • 2.Qa6#
      • 1...Rd8
        • 2.Qa6#
      • 1...Re8
        • 2.Qa6#
      • 1...Rf8
        • 2.Qa6#
      • 1...Rg8
        • 2.Qa6#
      • 1...Rh8
        • 2.Qa6#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Ra7!
    • 1.Qc3+?
      • 1...Kxa4
        • 2.Qa3#
        • 2.b6#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sxc3!
  • Keys
    • 1.Qc5!
      • 1...Kxa4
        • 2.Qa3#
      • 1...Ra6
        • 2.b6#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Rb8
        • 2.Qa7#
      • 1...Rc8
        • 2.Qa7#
      • 1...Rd8
        • 2.Qa7#
      • 1...Re8
        • 2.Qa7#
      • 1...Rf8
        • 2.Qa7#
      • 1...Rg8
        • 2.Qa7#
      • 1...Rh8
        • 2.Qa7#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(b);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
        • R(c);N_GUARD::QAR1(C),XR(c)
        • R(c);N_GUARD::QAR1(C)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • R(c);
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(C),XS(a)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • R(c);SBLOCK::QAR(C)+P(E)
      • R(c);N_GUARD::QAR2(C),XR(c)
      • R(c);N_GUARD::QAR2(C)
      • R(c);N_GUARD,P_PINB(F)::QAR2(C)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
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