MESON Chess Problem Database

Problem Display
PID: 239829 (4B1K1/3p4/Ppk5/1Nq4R/1p6/1p6/1P1P4/R1Q5 w - - 0 1)

Haring, Jacobus

Themes-64, 1968

4B1K1/3p4/Ppk5/1Nq4R/1p6/1p6/1P1P4/R1Q5

#2

9 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb5
      • 2.Bxd7#
    • 1...Qxc1
      • 2.Rxc1#
    • 1...Qc4+
      • 2.Qxc4#
  • Tries
    • 1.Qh1+?
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Kxb5!
    • 1.d4?
      • 1...Qc4+
        • 2.Qxc4#
      • 1...Kxb5
        • 2.Bxd7#
      • 1...Qxc1
        • 2.Rxc1#
      • 1...Qc3
        • 2.Qh6#
      • 1...Qc2!
    • 1.a7?
      • 1...Kxb5
        • 2.Bxd7#
      • 1...Kb7
        • 2.a8Q#
      • 1...Qxc1
        • 2.a8Q#
        • 2.a8B#
      • 1...Qc2
        • 2.a8Q#
        • 2.a8B#
      • 1...Qc3
        • 2.a8Q#
        • 2.a8B#
      • 1...Qc4+!
  • Keys
    • 1.d3!
      • 1...Qc4+
        • 2.Qxc4#
      • 1...Kxb5
        • 2.Bxd7#
      • 1...Qxc1
        • 2.Rxc1#
      • 1...Qc2
        • 2.Qh6#
      • 1...Qc3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT,XS(E)::B(H),XP(f)
    • Q(c);N_SPINQ(c),OGATE,XQ(B)::R(A),XQ(c)
    • Q(c);CHECK,OGATEB::QAR2(B),XQ(c)
  • Tries
    • Try
      • Q(B);CHECK,N_PINQ(c)
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAB1(B),XQ(c)
      • Refutation
        • K(e);P_SPINQ(c),S_FLIGHT,XS(E)
    • Try
      • P(D);
      • Vars
        • Q(c);CHECK,OGATEB::QAR2(B),XQ(c)
        • K(e);S_FLIGHT,XS(E)::B(H),XP(f)
        • Q(c);N_SPINQ(c),OGATE,XQ(B)::R(A),XQ(c)
        • Q(c);N_GUARD::QAR(B)
      • Refutation
        • Q(c);
    • Try
      • P(G);
      • Vars
        • K(e);S_FLIGHT,XS(E)::B(H),XP(f)
        • K(e);N_SPINP(f),N_SPINQ(c),S_FLIGHT::P=Q
        • Q(c);N_SPINQ(c),XQ(B)::P=Q
        • Q(c);::P=Q
      • Refutation
        • Q(c);CHECK
  • Actual
    • P(D);
    • Vars
      • Q(c);CHECK,OGATEB::QAR2(B),XQ(c)
      • K(e);S_FLIGHT,XS(E)::B(H),XP(f)
      • Q(c);N_SPINQ(c),OGATE,XQ(B)::R(A),XQ(c)
      • Q(c);N_GUARD::QAR(B)
      • Q(c);N_GUARD::QAB(B)
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