MESON Chess Problem Database

Problem Display
PID: 245101 (3R4/2R5/3B3q/K3P3/2Pk4/5P2/b1QP1P2/N2nr3 w - - 0 1)

Haring, Jacobus

De Maasbode, 1953

3R4/2R5/3B3q/K3P3/2Pk4/5P2/b1QP1P2/N2nr3

#2

11 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2+
      • 2.Qxd2#
    • 1...Rf1
      • 2.Qe4#
    • 1...Rg1
      • 2.Qe4#
    • 1...Rh1
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rxe5+
      • 2.Bc5#
    • 1...Bb1
      • 2.Sb3#
    • 1...Bb3
      • 2.Sxb3#
    • 1...Bxc4
      • 2.Qxc4#
    • 1...Sb2
      • 2.Qc3#
    • 1...Sxf2
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
      • 2.dxc3#
    • 1...Se3
      • 2.Qe4#
      • 2.Qc3#
  • Tries
    • 1.f4?
      • threat
        • 2.Bc5#
      • 1...Qxd6
        • 2.Rxd6#
      • 1...Sc3
        • 2.dxc3#
      • 1...Qxf4!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Sc2#
      • 1...Qxd2+
        • 2.Bb4#
      • 1...Rxe5+
        • 2.Bxe5#
      • 1...Bxc4
        • 2.Bc5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Bb1
        • 2.Sb3#
      • 1...Bb3
        • 2.Sxb3#
      • 1...Se3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(e);CHECK,OGATE,XP(C)::QAR2(B),XQ(e)
    • R(b);N_GUARD::QAR1(B)
    • R(b);N_GUARD::QAR1(B),XR(b)
    • R(b);CHECK,SBLOCK,XP(H)::R(K)+B(I),DCHECK
    • B(c);N_GUARD::S(A)
    • B(c);N_GUARD::S(A),XB(c)
    • B(c);OGATE,XP(F)::QAR1(B),XB(c)
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD,XP(D)::QAB1(B)
  • Tries
    • Try
      • P(E);
      • Threat
        • R(K)+B(I),DCHECK
      • Vars
        • Q(e);OGATE,P_SPINQ(e),XB(I)::R(K),XQ(e)
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • Q(e);XP(E)
  • Actual
    • Q(B);
    • Threat
      • S(A)
    • Vars
      • Q(e);CHECK,N_GUARD,XP(C)::R(K)+B(I)
      • R(b);CHECK,OGATE,XP(H)::R(K)+B(I),DCHECK,XR(b)
      • B(c);SBLOCK,XP(F)::R(K)+B(I),DCHECK
      • R(b);N_GUARD::QAR1(B),XR(b)
      • B(c);N_GUARD::S(A)
      • B(c);N_GUARD::S(A),XB(c)
      • S(a);S_CUTR(b)::QAR1(B)
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