MESON Chess Problem Database

Problem Display
PID: 17976 (4q3/N1pr1Pp1/1bp1P3/p1k3NR/7R/5b1r/QK1n3B/8 w - - 0 1)

Visserman, Eeltje

3rd HM., Probleemblad, 1952

4q3/N1pr1Pp1/1bp1P3/p1k3NR/7R/5b1r/QK1n3B/8

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Sxe6#
    • 1...Rd5
      • 2.Qa3#
    • 1...Bxa7
      • 2.Qxa5#
    • 1...Sb1
      • 2.Qc4#
    • 1...Sf1
      • 2.Qc4#
    • 1...Sc4+
      • 2.Qxc4#
  • Tries
    • 1.Sxf3+?
      • 1...Rd5
        • 2.Qa3#
      • 1...g5!
    • 1.Se4+?
      • 1...Kb4
        • 2.Sxc6#
      • 1...Kd4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Se4#
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Bxh5
        • 2.Qxc6#
      • 1...Bxa7
        • 2.Qxa5#
      • 1...Rd5
        • 2.Qa3#
      • 1...Be4
        • 2.Sxe4#
      • 1...Bd5
        • 2.Qd4#
      • 1...Se4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(k);XP(G)::R(F)+S(E),DCHECK,XQ(k)
    • R(i);SBLOCK::QAB(A)
    • B(f);N_GUARD,XS(H)::QAR2(A),XP(d)
    • S(a);N_GUARD::QAR1(A)
    • S(a);CHECK,N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • S(E);CHECK,XB(b)
      • Vars
        • R(i);P_SPINR(i)::QAB(A)
      • Refutation
        • P(j);P_SPINP(j)
    • Try
      • S(E);CHECK
      • Vars
        • K(e);S_FLIGHT::S(H),XP(g)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • R(F)+S(E),DCHECK
    • Vars
      • S(a);CHECK,N_GUARD::QAR1(A),XS(a)
      • K(e);P-FLIGHT::QAB1(A),XP(g)
      • B(b);N_GUARD,XR(F)::QAR1(A),XP(g)
      • B(f);N_GUARD,XS(H)::QAR2(A),XP(d)
      • R(i);SBLOCK::QAB(A)
      • B(b);::R(F)+S(E),DCHECK,XB(b)
      • B(b);S_CUTR(i)::QAB1(A)
      • S(a);::R(F)+S(E),DCHECK,XS(a)
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