MESON Chess Problem Database

Problem Display
PID: 259507 (q7/1Bp3p1/1B1pP3/pN1n4/Rbb1kPK1/p3r1P1/2P1r1n1/1Q2R2N w - - 0 1)

Niemeijer, Meindert

Western Morning News, 1924

(First published on Sat Sep 27 1924)

q7/1Bp3p1/1B1pP3/pN1n4/Rbb1kPK1/p3r1P1/2P1r1n1/1Q2R2N

#2

12 + 13

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe1
      • 2.Sf2#
    • 1...Rxc2
      • 2.Sf2#
    • 1...Rf2
      • 2.Sxf2#
    • 1...Rb3
      • 2.Sf2#
    • 1...Rc3
      • 2.Sf2#
    • 1...Rd3
      • 2.Sf2#
    • 1...Rxg3+
      • 2.Sxg3#
    • 1...Bxe1
      • 2.Rxc4#
    • 1...Bd2
      • 2.Rxc4#
    • 1...Bd3
      • 2.Sc3#
  • Tries
    • 1.Sc3+?
      • 1...Rxc3
        • 2.Sf2#
      • 1...Bxc3!
    • 1.Sxd6+?
      • 1...Bxd6
        • 2.Rxc4#
      • 1...cxd6!
    • 1.c3+?
      • 1...Rc2
        • 2.Sf2#
      • 1...Rd3
        • 2.Sf2#
      • 1...Bd3!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qd4#
      • 1...Rxg3+
        • 2.Sxg3#
      • 1...Rd2
        • 2.Qf3#
      • 1...Rd3
        • 2.Sf2#
      • 1...Bd2
        • 2.Rxc4#
      • 1...Bc3
        • 2.Qxd5#
      • 1...Bc5
        • 2.Qxd5#
      • 1...Bd3
        • 2.Sc3#
      • 1...c5
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD,XR(B)::S(C)
    • R(a);N_GUARD,P_SPINR(a),XP(D)::S(C)
    • R(a);N_GUARD,P_SPINR(d)::S(C),XR(a)
    • R(d);P_SPINR(a)::S(C)
    • R(d);CHECK,P_SPINR(a),XP(E)::S(C),XR(d)
    • B(e);OGATE,P_SPINB(f),XR(B)::R(F),XB(f)
    • B(e);OGATE,P_SPINB(f)::R(F),XB(f)
    • B(f);P_SPINB(e),S_CUTR(d)::S(I)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • R(d);P_SPINR(a),XS(I)::S(C)
      • Refutation
        • B(e);P_SPINB(f),XS(I)
    • Try
      • S(I);CHECK,XP(j)
      • Vars
        • B(e);OGATE,P_SPINB(f),XS(I)::R(F),XB(f)
      • Refutation
        • P(k);XS(I)
    • Try
      • P(D);CHECK
      • Vars
        • R(a);P_SPINR(a)::S(C)
        • R(d);P_SPINR(a)::S(C)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(d);CHECK,P_SPINR(a),XP(E)::S(C),XR(d)
      • R(a);OGATE,P_SPINR(d)::QAB1(A)
      • R(d);P_SPINR(a)::S(C)
      • B(e);OGATE,P_SPINB(f)::R(F),XB(f)
      • B(e);P_SPINB(f)::QAB1(A),XS(i)
      • B(f);P_SPINB(e),S_CUTR(d)::S(I)
      • P(k);N_GUARD,S_CUTB(e)::S(I),XP(j)
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