MESON Chess Problem Database

Problem Display
PID: 253368 (8/3p4/3Bp3/8/n2kP3/1Q3pN1/1npP1P2/2KbN3 w - - 0 1)

Niemeijer, Meindert

Western Morning News, 1921

(First published on Sat Apr 9 1921)

8/3p4/3Bp3/8/n2kP3/1Q3pN1/1npP1P2/2KbN3

#2

8 + 8

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Sxc2#
    • 1...Sd3+
      • 2.Qxd3#
    • 1...Sc4
      • 2.Qd3#
    • 1...Sc3
      • 2.Qxc3#
      • 2.dxc3#
    • 1...Sc5
      • 2.Qc3#
    • 1...Sb6
      • 2.Qc3#
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Sf5+?
      • 1...exf5
        • 2.Qd5#
      • 1...Kxe4!
    • 1.Qxb2+?
      • 1...Kc4
        • 2.Qb4#
        • 2.d3#
      • 1...Sc3
        • 2.Qxc3#
        • 2.Qb4#
      • 1...Sxb2!
    • 1.Qb5?
      • threat
        • 2.Be5#
      • 1...Sd3+
        • 2.Qxd3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e5
        • 2.Bxe5#
        • 2.Qd5#
      • 1...Sc4!
    • 1.Qb6+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sxb6!
  • Keys
    • 1.d3!
      • 1...Sxd3+
        • 2.Qxd3#
      • 1...Be2
        • 2.Sxc2#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc3
        • 2.Qb6#
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...e5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::S(B),XP(c)
    • S(b);CHECK,N_GUARD::QAR1(E),XS(b)
    • S(b);N_GUARD::QAR1(E)
    • S(e);N_GUARD::QAB1(E)
    • P(g);N_GUARD::QAR1(E)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • P(g);XS(F)::QAR1(E)
      • Refutation
        • K(f);P-FLIGHT,XP(G)
    • Try
      • Q(E);CHECK,XS(b)
      • Refutation
        • S(e);XQ(E)
    • Try
      • Q(E);
      • Threat
        • B(H)
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(E),XS(b)
        • S(e);N_GUARD::QAB1(E),XS(e)
      • Refutation
        • S(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);P-FLIGHT,S_CUTS(b)::QAR1(E)
        • S(e);N_GUARD,P_SPINS(e)::QAB1(E),XS(e)
      • Refutation
        • S(e);XQ(E)
  • Actual
    • P(C);
    • Vars
      • S(b);CHECK,OGATE,XP(C)::QAR1(E),XS(b)
      • B(a);N_GUARD::S(B),XP(c)
      • S(b);N_GUARD::QAR1(E),XS(b)
      • S(e);N_GUARD,SBLOCK::QAB(E)
      • S(e);N_GUARD::QAB(E),XS(b)
      • P(g);N_GUARD::S(F)
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